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Add unauthenticated mode demo for coreSNTP library for time synchronization (#621)

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Add the FreeRTOS/coreSNTP library as a submodule (along with manifest.yaml file update) and add a demo project to showcase use of the coreSNTP library for having a SNTP client daemon in the system for periodically synchronizing system time with the internet to maintain Coordinated Univeral Time (UTC) in a device. This demo maintains UTC time of system in RAM, thereby, representing systems without a Real-Time Clock (RTC) module in the device.

Note: This demo shows use of coreSNTP library for SNTP communication with NTP/SNTP time servers in non-authenticated mode (i.e. without any security mechanism payload beyond the standard 48 bytes of NTP packet exchange between client-server).
pull/623/head^2
Archit Aggarwal 4 years ago committed by GitHub
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.gitmodules vendored
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[submodule "FreeRTOS-Plus/Source/AWS/ota"]
path = FreeRTOS-Plus/Source/AWS/ota
url = https://github.com/aws/ota-for-aws-iot-embedded-sdk.git
[submodule "FreeRTOS-Plus/Source/Application-Protocols/coreSNTP"]
path = FreeRTOS-Plus/Source/Application-Protocols/coreSNTP
url = https://github.com/FreeRTOS/coreSNTP.git

802
FreeRTOS-Plus/Demo/coreSNTP_Windows_Simulator/DemoTasks/SNTPClientTask.c
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/*
* FreeRTOS V202104.00
* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
/*
* This file is part of the demo project that shows use of the coreSNTP library to create
* an SNTP client (daemon) task for synchronizing system time with internet time and
* maintaining Coordinated Universal Time (UTC) (or wall-clock time) in the system.
*
* This file contains the SNTP client (daemon) task as well as functionality for
* maintaining wall-clock or UTC time in RAM. The SNTP client periodically synchronizes
* system clock with an SNTP/NTP servers. Any other task running an application in the
* system can query the system time. For an example of an application task querying time
* from the system, refer to the SampleAppTask.c file in this project.
*
* !!! NOTE !!!
* This SNTP demo does not authenticate the server nor the client.
* Hence, this demo should not be used as production ready code.
*/
/* Standard includes. */
#include <string.h>
#include <stdio.h>
#include <stdint.h>
#include <time.h>
/* Kernel includes. */
#include "FreeRTOS.h"
#include "task.h"
/* Demo include. */
#include "common_demo_include.h"
/* SNTP library include. */
#include "core_sntp_client.h"
/* Synchronization primitive include. */
#include "semphr.h"
/* FreeRTOS+TCP includes */
#include "FreeRTOS_IP.h"
#include "FreeRTOS_UDP_IP.h"
#include "FreeRTOS_Sockets.h"
/*-----------------------------------------------------------*/
/* Compile time error for undefined configs. */
#ifndef democonfigLIST_OF_TIME_SERVERS
#error "Define the democonfigLIST_OF_TIME_SERVERS config by following the instructions in demo_config.h file."
#endif
#ifndef democonfigDESIRED_CLOCK_ACCURACY_MS
#error "Define the democonfigDESIRED_CLOCK_ACCURACY_MS config by following instructions in demo_config.h file."
#endif
#ifndef democonfigSYSTEM_CLOCK_TOLERANCE_PPM
#error "Define the democonfigSYSTEM_CLOCK_TOLERANCE_PPM config by following instructions in demo_config.h file."
#endif
#ifndef democonfigSYSTEM_START_YEAR
#error "Define the democonfigSYSTEM_START_YEAR config by following instructions in demo_config.h file."
#endif
/*-----------------------------------------------------------*/
/* Default values for configuration . */
#ifndef democonfigSERVER_RESPONSE_TIMEOUT_MS
#define democonfigSERVER_RESPONSE_TIMEOUT_MS ( 5000 )
#endif
/**
* @brief The size for network buffer that is allocated for initializing the coreSNTP library in the
* demo.
*
* @note The size of the buffer MUST be large enough to hold an entire SNTP packet, which includes the standard SNTP
* packet data of 48 bytes and authentication data for security mechanism, if used, in communication with time server.
*/
#define SNTP_CONTEXT_NETWORK_BUFFER_SIZE ( SNTP_PACKET_BASE_SIZE )
/**
* @brief The constant for storing the number of milliseconds per FreeRTOS tick in the system.
* @note This value represents the time duration per tick from the perspective of the
* of Windows Simulator based FreeRTOS system that carries lagging clock drift in relation to
* internet time or UTC time. Thus, the actual time duration value per tick of the system will be
* larger from the perspective of internet time.
*/
#define MILLISECONDS_PER_TICK ( 1000 / configTICK_RATE_HZ )
/*-----------------------------------------------------------*/
/**
* @brief The definition of the @ref NetworkContext_t structure for the demo.
* The structure wraps a FreeRTOS+TCP socket that is used for UDP communication
* with time servers.
*
* @note The context is used in the @ref UdpTransportInterface_t interface required
* by the coreSNTP library.
*
*/
struct NetworkContext
{
Socket_t socket;
};
/**
* @brief Structure aggregating state variables for RAM-based wall-clock time
* in Coordinated Universal Time (UTC) for system.
*
* @note This demo uses the following mathematical model to represent current
* time in RAM.
*
* BaseTime = Time set at boot or the last synchronized time
* Slew Rate = Number of seconds to adjust per system time second
* No. of ticks since last SNTP sync = Current FreeRTOS Tick Count -
* Tick count at last SNTP sync
*
* Time Elapsed since last SNTP sync = No. of ticks since last SNTP sync
* x
* Number of milliseconds per FreeRTOS tick
*
* Slew Adjustment = Slew Rate x Time Elapsed since last SNTP sync
*
* Current Time = Base Time +
* Time Elapsed since last SNTP sync +
* Slew Adjustment
*/
typedef struct SystemClock
{
UTCTime_t baseTime;
TickType_t lastSyncTickCount;
uint32_t pollPeriod;
uint32_t slewRate; /* Seconds/Seconds */
bool firstTimeSyncDone;
} SystemClock_t;
/**
* @brief Shared global system clock object for representing UTC/wall-clock
* time in system.
*/
static SystemClock_t systemClock;
/**
* @brief Mutex for protecting access to the shared memory of the
* system clock parameters.
*/
static SemaphoreHandle_t xMutex = NULL;
static StaticSemaphore_t xSemaphoreMutex;
/*-----------------------------------------------------------*/
/**
* @brief Utility function to convert the passed year to UNIX time representation
* of seconds since 1st Jan 1970 00h:00m:00s seconds to 1st Jan 00h:00m:00s of the
* the passed year.
*
* This utility does account for leap years.
*
* @param[in] The year to translate.
*/
static uint32_t translateYearToUnixSeconds( uint16_t year );
/**
* @brief Calculates the current time in the system.
* It calculates the current time as:
*
* BaseTime = Time set at device boot or the last synchronized time
* SlewRate = Number of seconds to adjust per system time second
*
* Current Time = Base Time +
* Time since last SNTP Synchronization +
* Slew Adjustment (if slew rate > 0) for time period since
* last SNTP synchronization
*
* @param[in] pBaseTime The base time in the system clock parameters.
* @param[in] lastSyncTickCount The tick count at the last time synchronization
* with a time server.
* @param[in] slewRate The slew rate as seconds of clock adjustment per FreeRTOS
* system time second.
* @param[out] pCurrentTime This will be populated with the calculated current
* UTC time in the system.
*/
static void calculateCurrentTime( UTCTime_t * pBaseTime,
TickType_t lastSyncTickCount,
uint32_t slewRate,
UTCTime_t * pCurrentTime );
/**
* @brief Initializes the SNTP context for the SNTP client task.
* This function generates an array of the configured time servers, creates a FreeRTOS UDP socket
* for the UDP transport interface and initializes the passed SNTP context by calling the
* Sntp_Init() API of the coreSNTP library.
*
* @param[in, out] pContext The memory for the SNTP client context that will be initialized with
* Sntp_Init API.
* @param[in] pTimeServers The list of time servers configured through the democonfigLIST_OF_TIME_SERVERS
* macro in demo_config.h.
* @param[in] numOfServers The number of time servers configured in democonfigLIST_OF_TIME_SERVERS.
* @param[in] pContextBuffer The allocated network buffer that will be initialized in the SNTP context.
* @param[in] pUdpContext The memory for the network context for the UDP transport interface that will
* be passed to the SNTP client context. This will be filled with a UDP context created by this function.
*
* @return Returns `true` if initialization of SNTP client context is successful; otherwise `false`.
*/
static bool initializeSntpClient( SntpContext_t * pContext,
const char ** pTimeServers,
size_t numOfServers,
uint8_t * pContextBuffer,
size_t contextBufferSize,
NetworkContext_t * pUdpContext );
/**
* @brief The demo implementation of the @ref SntpResolveDns_t interface to
* allow the coreSNTP library to resolve DNS name of a time server being
* used for requesting time from.
*
* @param[in] pTimeServer The time-server whose IPv4 address is to be resolved.
* @param[out] pIpV4Addr This is filled with the resolved IPv4 address of
* @p pTimeServer.
*/
static bool resolveDns( const SntpServerInfo_t * pServerAddr,
uint32_t * pIpV4Addr );
/**
* @brief The demo implementation of the @ref UdpTransportSendTo_t function
* of the UDP transport interface to allow the coreSNTP library to perform
* network operation of sending time request over UDP to the provided time server.
*
* @param[in] pNetworkContext This will be the NetworkContext_t context object
* representing the FreeRTOS UDP socket to use for network send operation.
* @param[in] serverAddr The IPv4 address of the time server.
* @param[in] serverPort The port of the server to send data to.
* @param[in] pBuffer The demo-supplied network buffer of size, SNTP_CONTEXT_NETWORK_BUFFER_SIZE,
* containing the data to send over the network.
* @param[in] bytesToSend The size of data in @p pBuffer to send.
*
* @return Returns the return code of FreeRTOS UDP send API, FreeRTOS_sendto, which returns
* 0 for error or timeout OR the number of bytes sent over the network.
*/
static int32_t UdpTransport_Send( NetworkContext_t * pNetworkContext,
uint32_t serverAddr,
uint16_t serverPort,
const void * pBuffer,
size_t bytesToSend );
/**
* @brief The demo implementation of the @ref UdpTransportRecvFrom_t function
* of the UDP transport interface to allow the coreSNTP library to perform
* network operation of reading expected time response over UDP from
* provided time server.
*
* @param[in] pNetworkContext This will be the NetworkContext_t context object
* representing the FreeRTOS UDP socket to use for network read operation.
* @param[in] pTimeServer The IPv4 address of the time server to receive data from.
* @param[in] serverPort The port of the server to receive data from.
* @param[out] pBuffer The demo-supplied network buffer of size, SNTP_CONTEXT_NETWORK_BUFFER_SIZE,
* that will be filled with data received from the network.
* @param[in] bytesToRecv The expected number of bytes to receive from the network
* for the server response server.
*
* @return Returns one of the following:
* - 0 for timeout in receiving any data from the network (by translating the
* -pdFREERTOS_ERRNO_EWOULDBLOCK return code from FreeRTOS_recvfrom API )
* OR
* - The number of bytes read from the network.
*/
static int32_t UdpTransport_Recv( NetworkContext_t * pNetworkContext,
uint32_t serverAddr,
uint16_t serverPort,
void * pBuffer,
size_t bytesToRecv );
/**
* @brief The demo implementation of the @ref SntpGetTime_t interface
* for obtaining system clock time for the coreSNTP library.
*
* @param[out] pTime This will be populated with the current time from
* the system.
*/
static void sntpClient_GetTime( SntpTimestamp_t * pCurrentTime );
/**
* @brief The demo implementation of the @ref SntpSetTime_t interface
* for correcting the system clock time based on the time received
* from the server response and the clock-offset value calculated by
* the coreSNTP library.
*
* @note This demo uses either the "slew" OR "step" methodology of system
* clock correction based on the use-case:
* 1. "Step" correction is used if:
* - System time is ahead of server time so that system time is immediately
* corrected instead of potentially receding back in time with a "slew"
* correction approach.
* OR
* - It is the first time synchronization for the system since boot-up. Using
* "step" approach immediately corrects the system if it is far away from the
* server time on device startup instead of slowly correcting over time with
* the "slew" approach.
*
* 2. The "slew" correction approach is used for all cases other than the above
* as they represent regular time synchronization during device runtime where
* the system time may have drifted behind the server time, and can be corrected
* gradually over the SNTP client's polling interval period.
*
* @note The above system clock correction algorithm is just one example of a correction
* approach. It can be modified to suit your application needs. Examples include:
* - Always using "slew" correction if the device is always within a small time offset from
* server and your application is sensitive to non-abrupt changes in time (that could occur
* with "step" approach) for use-cases like logging events in correct order
* - Always using a "step" approach for a simplicity if your application is not sensitive to
* abrupt changes/progress in time.
*/
static void sntpClient_SetTime( const SntpServerInfo_t * pTimeServer,
const SntpTimestamp_t * pServerTime,
int32_t clockOffsetSec,
SntpLeapSecondInfo_t leapSecondInfo );
/*------------------------------------------------------------------------------*/
static uint32_t translateYearToUnixSeconds( uint16_t year )
{
configASSERT( year >= 1970 );
uint32_t numOfDaysSince1970 = ( year - 1970 ) * 365;
/* Calculate the extra days in leap years (for February 29) over the time
* period from 1st Jan 1970 to 1st Jan of the passed year.
* By subtracting from the year 1969, the extra day in 1972 is covered. */
numOfDaysSince1970 += ( ( year - 1969 ) / 4 );
return( numOfDaysSince1970 * 24 * 3600 );
}
void calculateCurrentTime( UTCTime_t * pBaseTime,
TickType_t lastSyncTickCount,
uint32_t slewRate,
UTCTime_t * pCurrentTime )
{
uint64_t msElapsedSinceLastSync = 0;
TickType_t ticksElapsedSinceLastSync = xTaskGetTickCount() - lastSyncTickCount;
/* Calculate time elapsed since last synchronization according to the number
* of system ticks passed. */
msElapsedSinceLastSync = ticksElapsedSinceLastSync * MILLISECONDS_PER_TICK;
/* If slew rate is set, then apply the slew-based clock adjustment for the elapsed time. */
if( slewRate > 0 )
{
msElapsedSinceLastSync += ( uint64_t ) slewRate * msElapsedSinceLastSync;
}
/* Set the current UTC time in the output parameter. */
if( msElapsedSinceLastSync >= 1000 )
{
pCurrentTime->secs = pBaseTime->secs + msElapsedSinceLastSync / 1000;
pCurrentTime->msecs = msElapsedSinceLastSync % 1000;
}
else
{
pCurrentTime->secs = pBaseTime->secs;
pCurrentTime->msecs = msElapsedSinceLastSync;
}
}
/********************** DNS Resolution Interface *******************************/
static bool resolveDns( const SntpServerInfo_t * pServerAddr,
uint32_t * pIpV4Addr )
{
uint32_t resolvedAddr = 0;
bool status = false;
resolvedAddr = FreeRTOS_gethostbyname( pServerAddr->pServerName );
/* Set the output parameter if DNS look up succeeded. */
if( resolvedAddr != 0 )
{
/* DNS Look up succeeded. */
status = true;
*pIpV4Addr = resolvedAddr;
#if defined( LIBRARY_LOG_LEVEL ) && ( LIBRARY_LOG_LEVEL != LOG_NONE )
uint8_t stringAddr[ 16 ];
FreeRTOS_inet_ntoa( resolvedAddr, stringAddr );
LogInfo( ( "Resolved time server as %s", stringAddr ) );
#endif
}
return status;
}
/********************** UDP Interface definition *******************************/
int32_t UdpTransport_Send( NetworkContext_t * pNetworkContext,
uint32_t serverAddr,
uint16_t serverPort,
const void * pBuffer,
size_t bytesToSend )
{
struct freertos_sockaddr destinationAddress;
int32_t bytesSent;
destinationAddress.sin_addr = serverAddr;
destinationAddress.sin_port = FreeRTOS_htons( serverPort );
/* Send the buffer with ulFlags set to 0, so the FREERTOS_ZERO_COPY bit
* is clear. */
bytesSent = FreeRTOS_sendto( /* The socket being send to. */
pNetworkContext->socket,
/* The data being sent. */
pBuffer,
/* The length of the data being sent. */
bytesToSend,
/* ulFlags with the FREERTOS_ZERO_COPY bit clear. */
0,
/* Where the data is being sent. */
&destinationAddress,
/* Not used but should be set as shown. */
sizeof( destinationAddress )
);
return bytesSent;
}
static int32_t UdpTransport_Recv( NetworkContext_t * pNetworkContext,
uint32_t serverAddr,
uint16_t serverPort,
void * pBuffer,
size_t bytesToRecv )
{
struct freertos_sockaddr sourceAddress;
int32_t bytesReceived;
socklen_t addressLength = sizeof( struct freertos_sockaddr );
/* Receive into the buffer with ulFlags set to 0, so the FREERTOS_ZERO_COPY bit
* is clear. */
bytesReceived = FreeRTOS_recvfrom( /* The socket data is being received on. */
pNetworkContext->socket,
/* The buffer into which received data will be
* copied. */
pBuffer,
/* The length of the buffer into which data will be
* copied. */
bytesToRecv,
/* ulFlags with the FREERTOS_ZERO_COPY bit clear. */
0,
/* Will get set to the source of the received data. */
&sourceAddress,
/* Not used but should be set as shown. */
&addressLength
);
/* If data is received from the network, discard the data if received from a different source than
* the server. */
if( ( bytesReceived > 0 ) && ( ( sourceAddress.sin_addr != serverAddr ) ||
( FreeRTOS_ntohs( sourceAddress.sin_port ) != serverPort ) ) )
{
bytesReceived = 0;
#if defined( LIBRARY_LOG_LEVEL ) && ( LIBRARY_LOG_LEVEL != LOG_NONE )
/* Convert the IP address of the sender's address to string for logging. */
char stringAddr[ 16 ];
FreeRTOS_inet_ntoa( sourceAddress.sin_addr, stringAddr );
/* Log about reception of packet from unexpected sender. */
LogWarn( ( "Received UDP packet from unexpected source: Addr=%s Port=%u",
stringAddr, FreeRTOS_ntohs( sourceAddress.sin_port ) ) );
#endif
}
/* Translate the return code of timeout to the UDP transport interface expected
* code to indicate read retry. */
else if( bytesReceived == -pdFREERTOS_ERRNO_EWOULDBLOCK )
{
bytesReceived = 0;
}
return bytesReceived;
}
/**************************** Time Interfaces ************************************************/
static void sntpClient_GetTime( SntpTimestamp_t * pCurrentTime )
{
UTCTime_t currentTime;
uint64_t ntpSecs;
/* Obtain mutex for accessing system clock variables */
xSemaphoreTake( xMutex, portMAX_DELAY );
calculateCurrentTime( &systemClock.baseTime,
systemClock.lastSyncTickCount,
systemClock.slewRate,
&currentTime );
/* Release mutex. */
xSemaphoreGive( xMutex );
/* Convert UTC time from UNIX timescale to SNTP timestamp format. */
ntpSecs = currentTime.secs + SNTP_TIME_AT_UNIX_EPOCH_SECS;
/* Support case of SNTP timestamp rollover on 7 February 2036 when
* converting from UNIX time to SNTP timestamp. */
if( ntpSecs > UINT32_MAX )
{
/* Subtract an extra second as timestamp 0 represents the epoch for
* NTP era 1. */
pCurrentTime->seconds = ntpSecs - UINT32_MAX - 1;
}
else
{
pCurrentTime->seconds = ntpSecs;
}
pCurrentTime->fractions = MILLISECONDS_TO_SNTP_FRACTIONS( currentTime.msecs );
}
static void sntpClient_SetTime( const SntpServerInfo_t * pTimeServer,
const SntpTimestamp_t * pServerTime,
int32_t clockOffsetSec,
SntpLeapSecondInfo_t leapSecondInfo )
{
/* TODO - Handle leap second. */
( void ) leapSecondInfo;
( void ) pTimeServer;
/* Obtain the mutext for accessing system clock variables. */
xSemaphoreTake( xMutex, portMAX_DELAY );
/* Use "step" approach if:
* The system clock has drifted ahead of server time.
* OR
* This is the first time synchronization with NTP server since device boot-up.
*/
if( ( clockOffsetSec < 0 ) || ( systemClock.firstTimeSyncDone == false ) )
{
SntpStatus_t status;
uint32_t unixSecs;
uint32_t unixMicroSecs;
/* Convert server time from NTP timestamp to UNIX format. */
status = Sntp_ConvertToUnixTime( pServerTime,
&unixSecs,
&unixMicroSecs );
configASSERT( status == SntpSuccess );
/* Immediately correct the base time of the system clock as server time. */
systemClock.baseTime.secs = unixSecs;
systemClock.baseTime.msecs = unixMicroSecs / 1000;
/* Reset slew rate to zero as the time has been immediately corrected to server time. */
systemClock.slewRate = 0;
/* Store the tick count of the current time synchronization in the system clock. */
systemClock.lastSyncTickCount = xTaskGetTickCount();
/* Set the system clock flag that indicates completion of the first time synchronization since device boot-up. */
if( systemClock.firstTimeSyncDone == false )
{
systemClock.firstTimeSyncDone = true;
}
}
/* As the system clock is behind server time, we will use a "slew" approach to gradually
* correct system time over the poll interval period. */
else
{
/* Update the base time based on the previous slew rate and the time period transpired
* since last time synchronization. */
calculateCurrentTime( &systemClock.baseTime,
systemClock.lastSyncTickCount,
systemClock.slewRate,
&systemClock.baseTime );
/* Calculate the new slew rate as offset in seconds of adjustment per second. */
systemClock.slewRate = clockOffsetSec / systemClock.pollPeriod;
/* Store the tick count of the current time synchronization in the system clock. */
systemClock.lastSyncTickCount = xTaskGetTickCount();
}
xSemaphoreGive( xMutex );
}
/*************************************************************************************/
void initializeSystemClock( void )
{
/* On boot-up initialize the system time as the first second in the configured year. */
int64_t startupTimeInUnixSecs = translateYearToUnixSeconds( democonfigSYSTEM_START_YEAR );
systemClock.baseTime.secs = startupTimeInUnixSecs;
systemClock.baseTime.msecs = 0;
LogInfo( ( "System time has been initialized to the year %u", democonfigSYSTEM_START_YEAR ) );
printTime( &systemClock.baseTime );
/* Initialize semaphore for guarding access to system clock variables. */
xMutex = xSemaphoreCreateMutexStatic( &xSemaphoreMutex );
configASSERT( xMutex );
/* Clear the first time sync completed flag of the system clock object so that a "step" correction
* of system time is utilized for the first time synchronization from a time server. */
systemClock.firstTimeSyncDone = false;
}
/*-----------------------------------------------------------*/
static bool initializeSntpClient( SntpContext_t * pContext,
const char ** pTimeServers,
size_t numOfServers,
uint8_t * pContextBuffer,
size_t contextBufferSize,
NetworkContext_t * pUdpContext )
{
bool initStatus = false;
/* Populate the list of time servers. */
SntpServerInfo_t * pServers = pvPortMalloc( sizeof( SntpServerInfo_t ) * numOfServers );
if( pServers == NULL )
{
LogError( ( "Unable to initialize SNTP client: Malloc failed for memory of configured time servers." ) );
}
else
{
for( int8_t index = 0; index < numOfServers; index++ )
{
pServers[ index ].pServerName = pTimeServers[ index ];
pServers[ index ].port = SNTP_DEFAULT_SERVER_PORT;
}
LogInfo( ( "Calculated poll interval: %lus", systemClock.pollPeriod ) );
/* Create a UDP socket for network I/O with server. */
pUdpContext->socket = FreeRTOS_socket( FREERTOS_AF_INET,
FREERTOS_SOCK_DGRAM,
FREERTOS_IPPROTO_UDP );
/* Check the socket was created successfully. */
/* TODO - Consider using random port assigned by FreeRTOS for better protection */
/* against "off-path" attacker. */
if( pUdpContext->socket == FREERTOS_INVALID_SOCKET )
{
/* There was insufficient FreeRTOS heap memory available for the socket
* to be created. */
LogError( ( "Failed to create UDP socket for SNTP client due to insufficient memory." ) );
}
else
{
struct freertos_sockaddr bindAddress;
UdpTransportInterface_t udpTransportIntf;
bindAddress.sin_port = FreeRTOS_htons( SNTP_DEFAULT_SERVER_PORT );
if( FreeRTOS_bind( pUdpContext->socket, &bindAddress, sizeof( bindAddress ) ) == 0 )
{
/* The bind was successful. */
LogDebug( ( "UDP socket has been bound to port %lu", SNTP_DEFAULT_SERVER_PORT ) );
}
/* Set the UDP transport interface object. */
udpTransportIntf.pUserContext = pUdpContext;
udpTransportIntf.sendTo = UdpTransport_Send;
udpTransportIntf.recvFrom = UdpTransport_Recv;
/* Initialize context. */
Sntp_Init( pContext,
pServers,
numOfServers,
democonfigSERVER_RESPONSE_TIMEOUT_MS,
pContextBuffer,
contextBufferSize,
resolveDns,
sntpClient_GetTime,
sntpClient_SetTime,
&udpTransportIntf,
NULL );
initStatus = true;
}
}
return initStatus;
}
/*-----------------------------------------------------------*/
void sntpTask( void * pParameters )
{
SntpContext_t clientContext;
bool initStatus = false;
/* Variable representing the SNTP client context. */
static SntpContext_t context;
/* Memory for the SNTP packet buffer in the SNTP context. */
static uint8_t contextBuffer[ SNTP_CONTEXT_NETWORK_BUFFER_SIZE ];
/* Memory for the network context representing the UDP socket that will be
* passed to the SNTP client context. */
static NetworkContext_t udpContext;
/* Store the configured time servers in an array. */
static const char * pTimeServers[] = { democonfigLIST_OF_TIME_SERVERS };
const size_t numOfServers = sizeof( pTimeServers ) / sizeof( char * );
initStatus = initializeSntpClient( &clientContext,
pTimeServers,
numOfServers,
contextBuffer,
sizeof( contextBuffer ),
&udpContext );
if( initStatus == true )
{
SntpStatus_t status;
/* Calculate Poll interval of SNTP client based on desired accuracy and clock tolerance of the system. */
status = Sntp_CalculatePollInterval( democonfigSYSTEM_CLOCK_TOLERANCE_PPM,
democonfigDESIRED_CLOCK_ACCURACY_MS,
&systemClock.pollPeriod );
configASSERT( status == SntpSuccess );
LogInfo( ( "Initialized SNTP Client context. Starting the SNTP client loop for time synchronization every %lu seconds",
systemClock.pollPeriod ) );
/* SNTP Client loop of sending and receiving SNTP packets for time synchronization at poll intervals */
while( 1 )
{
/* TODO - Generate random number with corePKCS11. */
status = Sntp_SendTimeRequest( &clientContext, 100 );
configASSERT( status == SntpSuccess );
/* Wait till the server response is not received. */
do
{
/* Attempt to receive server response each time for 200 ms. */
status = Sntp_ReceiveTimeResponse( &clientContext, 200 );
} while( status == SntpNoResponseReceived );
/* Wait for the poll interval period before the next iteration of time synchronization. */
vTaskDelay( pdMS_TO_TICKS( systemClock.pollPeriod * 1000 ) );
}
}
else
{
configASSERT( false );
/* Terminate the task as the SNTP client failed to be run. */
LogError( ( "Failed to initialize SNTP client. Terminating SNTP client task.." ) );
vTaskDelete( NULL );
}
}
/*-----------------------------------------------------------*/
void systemGetWallClockTime( UTCTime_t * pTime )
{
TickType_t xTickCount = 0;
uint32_t ulTimeMs = 0UL;
/* Obtain the mutext for accessing system clock variables. */
xSemaphoreTake( xMutex, portMAX_DELAY );
/* Calculate the current RAM-based time using a mathematical formula using
* system clock state parameters and the time transpired since last synchronization. */
calculateCurrentTime( &systemClock.baseTime,
systemClock.lastSyncTickCount,
systemClock.slewRate,
pTime );
xSemaphoreGive( xMutex );
}
/*-----------------------------------------------------------*/

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/*
* FreeRTOS V202104.00
* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
/*
* This file belongs to the demo for showing use of the coreSNTP library for synchronizing
* system time with internet time and maintaining correct wall-clock time.
*
* This file shows how an application task can query Coordinated Universal Time (UTC) from system,
* that is maintained and synchronized periodically in the SNTP client (daemon) task of the demo
* project. Refer to the the SNTPClientTask.c file in this project for the SNTP client task.
*/
/* Standard includes. */
#include <string.h>
#include <stdio.h>
#include <stdint.h>
#include <time.h>
/* Kernel includes. */
#include "FreeRTOS.h"
#include "task.h"
/* Demo includes. */
#include "common_demo_include.h"
/*-----------------------------------------------------------*/
/**
* @brief The periodicity of the application task in query and logging system time. This is the time
* interval between consecutive system clock time queries in the sample application task.
*/
#define CLOCK_QUERY_TASK_DELAY_MS ( 1000 )
/*-----------------------------------------------------------*/
void printTime( const UTCTime_t * pUnixTime )
{
struct tm * currTime;
time_t time;
/* Obtain the broken-down UTC representation of the current system time. */
time = pUnixTime->secs;
currTime = gmtime( &time );
/* Log the time as both UNIX timestamp and Human Readable time. */
LogInfo( ( "Time:\nUNIX=%lusecs %lums\nHuman Readable=%lu-%02lu-%02lu %02luh:%02lum:%02lus",
pUnixTime->secs, pUnixTime->msecs,
currTime->tm_year + 1900, currTime->tm_mon + 1, currTime->tm_mday,
currTime->tm_hour, currTime->tm_min, currTime->tm_sec ) );
}
/*************************************************************************************/
/* Sample application task that will query and log system time every second. */
void sampleAppTask( void * pvParameters )
{
UTCTime_t systemTime;
while( 1 )
{
systemGetWallClockTime( &systemTime );
printTime( &systemTime );
vTaskDelay( pdMS_TO_TICKS( CLOCK_QUERY_TASK_DELAY_MS ) );
}
}
/*-----------------------------------------------------------*/

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/*
* FreeRTOS V202104.00
* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* http://www.FreeRTOS.org
* http://aws.amazon.com/freertos
*
* 1 tab == 4 spaces!
*/
#ifndef FREERTOS_CONFIG_H
#define FREERTOS_CONFIG_H
/*-----------------------------------------------------------
* Application specific definitions.
*
* These definitions should be adjusted for your particular hardware and
* application requirements.
*
* THESE PARAMETERS ARE DESCRIBED WITHIN THE 'CONFIGURATION' SECTION OF THE
* FreeRTOS API DOCUMENTATION AVAILABLE ON THE FreeRTOS.org WEB SITE.
* http://www.freertos.org/a00110.html
*
* The bottom of this file contains some constants specific to running the UDP
* stack in this demo. Constants specific to FreeRTOS+TCP itself (rather than
* the demo) are contained in FreeRTOSIPConfig.h.
*----------------------------------------------------------*/
#define configUSE_PREEMPTION 1
#define configUSE_PORT_OPTIMISED_TASK_SELECTION 1
#define configMAX_PRIORITIES ( 7 )
#define configTICK_RATE_HZ ( 1000 ) /* In this non-real time simulated environment the tick frequency has to be at least a multiple of the Win32 tick frequency, and therefore very slow. */
#define configMINIMAL_STACK_SIZE ( ( unsigned short ) 60 ) /* In this simulated case, the stack only has to hold one small structure as the real stack is part of the Win32 thread. */
#define configTOTAL_HEAP_SIZE ( ( size_t ) ( 2048U * 1024U ) )
#define configMAX_TASK_NAME_LEN ( 15 )
#define configUSE_TRACE_FACILITY 0
#define configUSE_16_BIT_TICKS 0
#define configIDLE_SHOULD_YIELD 1
#define configUSE_CO_ROUTINES 0
#define configUSE_MUTEXES 1
#define configUSE_RECURSIVE_MUTEXES 1
#define configQUEUE_REGISTRY_SIZE 0
#define configUSE_APPLICATION_TASK_TAG 0
#define configUSE_COUNTING_SEMAPHORES 1
#define configUSE_ALTERNATIVE_API 0
#define configNUM_THREAD_LOCAL_STORAGE_POINTERS 0
#define configENABLE_BACKWARD_COMPATIBILITY 1
#define configSUPPORT_STATIC_ALLOCATION 1
#define configUSE_STATS_FORMATTING_FUNCTIONS 0
/* Hook function related definitions. */
#define configUSE_TICK_HOOK 0
#define configUSE_IDLE_HOOK 0
#define configUSE_MALLOC_FAILED_HOOK 0
#define configCHECK_FOR_STACK_OVERFLOW 0 /* Not applicable to the Win32 port. */
/* Software timer related definitions. */
#define configUSE_TIMERS 1
#define configTIMER_TASK_PRIORITY ( configMAX_PRIORITIES - 1 )
#define configTIMER_QUEUE_LENGTH 5
#define configTIMER_TASK_STACK_DEPTH ( configMINIMAL_STACK_SIZE * 2 )
/* Event group related definitions. */
#define configUSE_EVENT_GROUPS 1
/* Run time stats gathering configuration options. */
#define configGENERATE_RUN_TIME_STATS 0
/* Co-routine definitions. */
#define configUSE_CO_ROUTINES 0
#define configMAX_CO_ROUTINE_PRIORITIES ( 2 )
/* Set the following definitions to 1 to include the API function, or zero
* to exclude the API function. */
#define INCLUDE_vTaskPrioritySet 1
#define INCLUDE_uxTaskPriorityGet 1
#define INCLUDE_vTaskDelete 1
#define INCLUDE_vTaskCleanUpResources 0
#define INCLUDE_vTaskSuspend 1
#define INCLUDE_vTaskDelayUntil 1
#define INCLUDE_vTaskDelay 1
#define INCLUDE_uxTaskGetStackHighWaterMark 1
#define INCLUDE_xTaskGetSchedulerState 1
#define INCLUDE_xTimerGetTimerTaskHandle 0
#define INCLUDE_xTaskGetIdleTaskHandle 0
#define INCLUDE_xQueueGetMutexHolder 1
#define INCLUDE_eTaskGetState 1
#define INCLUDE_xEventGroupSetBitsFromISR 1
#define INCLUDE_xTimerPendFunctionCall 1
#define INCLUDE_pcTaskGetTaskName 1
/* Assert call defined for debug builds. */
#ifdef _DEBUG
extern void vAssertCalled( const char * pcFile,
uint32_t ulLine );
#define configASSERT( x ) if( ( x ) == 0 ) vAssertCalled( __FILE__, __LINE__ )
#endif /* _DEBUG */
/* Application specific definitions follow. **********************************/
/* Only used when running in the FreeRTOS Windows simulator. Defines the
* priority of the task used to simulate Ethernet interrupts. */
#define configMAC_ISR_SIMULATOR_PRIORITY ( configMAX_PRIORITIES - 1 )
/* This demo creates a virtual network connection by accessing the raw Ethernet
* or WiFi data to and from a real network connection. Many computers have more
* than one real network port, and configNETWORK_INTERFACE_TO_USE is used to tell
* the demo which real port should be used to create the virtual port. The ports
* available are displayed on the console when the application is executed. For
* example, on my development laptop setting configNETWORK_INTERFACE_TO_USE to 4
* results in the wired network being used, while setting
* configNETWORK_INTERFACE_TO_USE to 2 results in the wireless network being
* used. */
#define configNETWORK_INTERFACE_TO_USE ( 2L )
/* The address to which logging is sent should UDP logging be enabled. */
#define configUDP_LOGGING_ADDR0 192
#define configUDP_LOGGING_ADDR1 168
#define configUDP_LOGGING_ADDR2 0
#define configUDP_LOGGING_ADDR3 11
/* Default MAC address configuration. The demo creates a virtual network
* connection that uses this MAC address by accessing the raw Ethernet/WiFi data
* to and from a real network connection on the host PC. See the
* configNETWORK_INTERFACE_TO_USE definition above for information on how to
* configure the real network connection to use. */
#define configMAC_ADDR0 0x00
#define configMAC_ADDR1 0x11
#define configMAC_ADDR2 0x11
#define configMAC_ADDR3 0x11
#define configMAC_ADDR4 0x11
#define configMAC_ADDR5 0x41
/* Default IP address configuration. Used in ipconfigUSE_DNS is set to 0, or
* ipconfigUSE_DNS is set to 1 but a DNS server cannot be contacted. */
#define configIP_ADDR0 10
#define configIP_ADDR1 10
#define configIP_ADDR2 10
#define configIP_ADDR3 200
/* Default gateway IP address configuration. Used in ipconfigUSE_DNS is set to
* 0, or ipconfigUSE_DNS is set to 1 but a DNS server cannot be contacted. */
#define configGATEWAY_ADDR0 10
#define configGATEWAY_ADDR1 10
#define configGATEWAY_ADDR2 10
#define configGATEWAY_ADDR3 1
/* Default DNS server configuration. OpenDNS addresses are 208.67.222.222 and
* 208.67.220.220. Used in ipconfigUSE_DNS is set to 0, or ipconfigUSE_DNS is set
* to 1 but a DNS server cannot be contacted.*/
#define configDNS_SERVER_ADDR0 208
#define configDNS_SERVER_ADDR1 67
#define configDNS_SERVER_ADDR2 222
#define configDNS_SERVER_ADDR3 222
/* Default netmask configuration. Used in ipconfigUSE_DNS is set to 0, or
* ipconfigUSE_DNS is set to 1 but a DNS server cannot be contacted. */
#define configNET_MASK0 255
#define configNET_MASK1 0
#define configNET_MASK2 0
#define configNET_MASK3 0
/* The UDP port to which print messages are sent. */
#define configPRINT_PORT ( 15000 )
#if ( defined( _MSC_VER ) && ( _MSC_VER <= 1600 ) && !defined( snprintf ) )
/* Map to Windows names. */
#define snprintf _snprintf
#define vsnprintf _vsnprintf
#endif
/* Visual studio does not have an implementation of strcasecmp(). */
#define strcasecmp _stricmp
#define strncasecmp _strnicmp
#define strcmpi _strcmpi
/* Prototype for the function used to print out. In this case it prints to the
* console before the network is connected then a UDP port after the network has
* connected. */
extern void vLoggingPrintf( const char * pcFormatString,
... );
#define configPRINTF( X ) vLoggingPrintf X
#endif /* FREERTOS_CONFIG_H */

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/*
* FreeRTOS V202104.00
* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* http://www.FreeRTOS.org
* http://aws.amazon.com/freertos
*
* 1 tab == 4 spaces!
*/
/*****************************************************************************
*
* See the following URL for configuration information.
* http://www.freertos.org/FreeRTOS-Plus/FreeRTOS_Plus_TCP/TCP_IP_Configuration.html
*
*****************************************************************************/
#ifndef FREERTOS_IP_CONFIG_H
#define FREERTOS_IP_CONFIG_H
/* Prototype for the function used to print out. In this case it prints to the
* console before the network is connected then a UDP port after the network has
* connected. */
extern void vLoggingPrintf( const char * pcFormatString,
... );
/* Set to 1 to print out debug messages. If ipconfigHAS_DEBUG_PRINTF is set to
* 1 then FreeRTOS_debug_printf should be defined to the function used to print
* out the debugging messages. */
#define ipconfigHAS_DEBUG_PRINTF 0
#if ( ipconfigHAS_DEBUG_PRINTF == 1 )
#define FreeRTOS_debug_printf( X ) vLoggingPrintf X
#endif
/* Set to 1 to print out non debugging messages, for example the output of the
* FreeRTOS_netstat() command, and ping replies. If ipconfigHAS_PRINTF is set to 1
* then FreeRTOS_printf should be set to the function used to print out the
* messages. */
#define ipconfigHAS_PRINTF 1
#if ( ipconfigHAS_PRINTF == 1 )
#define FreeRTOS_printf( X ) vLoggingPrintf X
#endif
/* Define the byte order of the target MCU (the MCU FreeRTOS+TCP is executing
* on). Valid options are pdFREERTOS_BIG_ENDIAN and pdFREERTOS_LITTLE_ENDIAN. */
#define ipconfigBYTE_ORDER pdFREERTOS_LITTLE_ENDIAN
/* If the network card/driver includes checksum offloading (IP/TCP/UDP checksums)
* then set ipconfigDRIVER_INCLUDED_RX_IP_CHECKSUM to 1 to prevent the software
* stack repeating the checksum calculations. */
#define ipconfigDRIVER_INCLUDED_RX_IP_CHECKSUM 1
/* Several API's will block until the result is known, or the action has been
* performed, for example FreeRTOS_send() and FreeRTOS_recv(). The timeouts can be
* set per socket, using setsockopt(). If not set, the times below will be
* used as defaults. */
#define ipconfigSOCK_DEFAULT_RECEIVE_BLOCK_TIME ( 5000 )
#define ipconfigSOCK_DEFAULT_SEND_BLOCK_TIME ( 5000 )
/* Include support for LLMNR: Link-local Multicast Name Resolution
* (non-Microsoft) */
#define ipconfigUSE_LLMNR ( 0 )
/* Include support for NBNS: NetBIOS Name Service (Microsoft) */
#define ipconfigUSE_NBNS ( 0 )
/* Include support for DNS caching. For TCP, having a small DNS cache is very
* useful. When a cache is present, ipconfigDNS_REQUEST_ATTEMPTS can be kept low
* and also DNS may use small timeouts. If a DNS reply comes in after the DNS
* socket has been destroyed, the result will be stored into the cache. The next
* call to FreeRTOS_gethostbyname() will return immediately, without even creating
* a socket. */
#define ipconfigUSE_DNS_CACHE ( 1 )
#define ipconfigDNS_CACHE_NAME_LENGTH ( 32 )
#define ipconfigDNS_CACHE_ENTRIES ( 4 )
#define ipconfigDNS_REQUEST_ATTEMPTS ( 2 )
/* The IP stack executes it its own task (although any application task can make
* use of its services through the published sockets API). ipconfigUDP_TASK_PRIORITY
* sets the priority of the task that executes the IP stack. The priority is a
* standard FreeRTOS task priority so can take any value from 0 (the lowest
* priority) to (configMAX_PRIORITIES - 1) (the highest priority).
* configMAX_PRIORITIES is a standard FreeRTOS configuration parameter defined in
* FreeRTOSConfig.h, not FreeRTOSIPConfig.h. Consideration needs to be given as to
* the priority assigned to the task executing the IP stack relative to the
* priority assigned to tasks that use the IP stack. */
#define ipconfigIP_TASK_PRIORITY ( configMAX_PRIORITIES - 2 )
/* The size, in words (not bytes), of the stack allocated to the FreeRTOS+TCP
* task. This setting is less important when the FreeRTOS Win32 simulator is used
* as the Win32 simulator only stores a fixed amount of information on the task
* stack. FreeRTOS includes optional stack overflow detection, see:
* http://www.freertos.org/Stacks-and-stack-overflow-checking.html */
#define ipconfigIP_TASK_STACK_SIZE_WORDS ( configMINIMAL_STACK_SIZE * 5 )
/* ipconfigRAND32() is called by the IP stack to generate random numbers for
* things such as a DHCP transaction number or initial sequence number. Random
* number generation is performed via this macro to allow applications to use their
* own random number generation method. For example, it might be possible to
* generate a random number by sampling noise on an analogue input. */
extern UBaseType_t uxRand();
#define ipconfigRAND32() uxRand()
/* If ipconfigUSE_NETWORK_EVENT_HOOK is set to 1 then FreeRTOS+TCP will call the
* network event hook at the appropriate times. If ipconfigUSE_NETWORK_EVENT_HOOK
* is not set to 1 then the network event hook will never be called. See
* http://www.FreeRTOS.org/FreeRTOS-Plus/FreeRTOS_Plus_UDP/API/vApplicationIPNetworkEventHook.shtml
*/
#define ipconfigUSE_NETWORK_EVENT_HOOK 1
/* Sockets have a send block time attribute. If FreeRTOS_sendto() is called but
* a network buffer cannot be obtained then the calling task is held in the Blocked
* state (so other tasks can continue to executed) until either a network buffer
* becomes available or the send block time expires. If the send block time expires
* then the send operation is aborted. The maximum allowable send block time is
* capped to the value set by ipconfigMAX_SEND_BLOCK_TIME_TICKS. Capping the
* maximum allowable send block time prevents prevents a deadlock occurring when
* all the network buffers are in use and the tasks that process (and subsequently
* free) the network buffers are themselves blocked waiting for a network buffer.
* ipconfigMAX_SEND_BLOCK_TIME_TICKS is specified in RTOS ticks. A time in
* milliseconds can be converted to a time in ticks by dividing the time in
* milliseconds by portTICK_PERIOD_MS. */
#define ipconfigUDP_MAX_SEND_BLOCK_TIME_TICKS ( 5000 / portTICK_PERIOD_MS )
/* If ipconfigUSE_DHCP is 1 then FreeRTOS+TCP will attempt to retrieve an IP
* address, netmask, DNS server address and gateway address from a DHCP server. If
* ipconfigUSE_DHCP is 0 then FreeRTOS+TCP will use a static IP address. The
* stack will revert to using the static IP address even when ipconfigUSE_DHCP is
* set to 1 if a valid configuration cannot be obtained from a DHCP server for any
* reason. The static configuration used is that passed into the stack by the
* FreeRTOS_IPInit() function call. */
#define ipconfigUSE_DHCP 1
/* When ipconfigUSE_DHCP is set to 1, DHCP requests will be sent out at
* increasing time intervals until either a reply is received from a DHCP server
* and accepted, or the interval between transmissions reaches
* ipconfigMAXIMUM_DISCOVER_TX_PERIOD. The IP stack will revert to using the
* static IP address passed as a parameter to FreeRTOS_IPInit() if the
* re-transmission time interval reaches ipconfigMAXIMUM_DISCOVER_TX_PERIOD without
* a DHCP reply being received. */
#define ipconfigMAXIMUM_DISCOVER_TX_PERIOD ( 120000 / portTICK_PERIOD_MS )
/* The ARP cache is a table that maps IP addresses to MAC addresses. The IP
* stack can only send a UDP message to a remove IP address if it knowns the MAC
* address associated with the IP address, or the MAC address of the router used to
* contact the remote IP address. When a UDP message is received from a remote IP
* address the MAC address and IP address are added to the ARP cache. When a UDP
* message is sent to a remote IP address that does not already appear in the ARP
* cache then the UDP message is replaced by a ARP message that solicits the
* required MAC address information. ipconfigARP_CACHE_ENTRIES defines the maximum
* number of entries that can exist in the ARP table at any one time. */
#define ipconfigARP_CACHE_ENTRIES 6
/* ARP requests that do not result in an ARP response will be re-transmitted a
* maximum of ipconfigMAX_ARP_RETRANSMISSIONS times before the ARP request is
* aborted. */
#define ipconfigMAX_ARP_RETRANSMISSIONS ( 5 )
/* ipconfigMAX_ARP_AGE defines the maximum time between an entry in the ARP
* table being created or refreshed and the entry being removed because it is stale.
* New ARP requests are sent for ARP cache entries that are nearing their maximum
* age. ipconfigMAX_ARP_AGE is specified in tens of seconds, so a value of 150 is
* equal to 1500 seconds (or 25 minutes). */
#define ipconfigMAX_ARP_AGE 150
/* Implementing FreeRTOS_inet_addr() necessitates the use of string handling
* routines, which are relatively large. To save code space the full
* FreeRTOS_inet_addr() implementation is made optional, and a smaller and faster
* alternative called FreeRTOS_inet_addr_quick() is provided. FreeRTOS_inet_addr()
* takes an IP in decimal dot format (for example, "192.168.0.1") as its parameter.
* FreeRTOS_inet_addr_quick() takes an IP address as four separate numerical octets
* (for example, 192, 168, 0, 1) as its parameters. If
* ipconfigINCLUDE_FULL_INET_ADDR is set to 1 then both FreeRTOS_inet_addr() and
* FreeRTOS_indet_addr_quick() are available. If ipconfigINCLUDE_FULL_INET_ADDR is
* not set to 1 then only FreeRTOS_indet_addr_quick() is available. */
#define ipconfigINCLUDE_FULL_INET_ADDR 1
/* ipconfigNUM_NETWORK_BUFFER_DESCRIPTORS defines the total number of network buffer that
* are available to the IP stack. The total number of network buffers is limited
* to ensure the total amount of RAM that can be consumed by the IP stack is capped
* to a pre-determinable value. */
#define ipconfigNUM_NETWORK_BUFFER_DESCRIPTORS 60
/* A FreeRTOS queue is used to send events from application tasks to the IP
* stack. ipconfigEVENT_QUEUE_LENGTH sets the maximum number of events that can
* be queued for processing at any one time. The event queue must be a minimum of
* 5 greater than the total number of network buffers. */
#define ipconfigEVENT_QUEUE_LENGTH ( ipconfigNUM_NETWORK_BUFFER_DESCRIPTORS + 5 )
/* The address of a socket is the combination of its IP address and its port
* number. FreeRTOS_bind() is used to manually allocate a port number to a socket
* (to 'bind' the socket to a port), but manual binding is not normally necessary
* for client sockets (those sockets that initiate outgoing connections rather than
* wait for incoming connections on a known port number). If
* ipconfigALLOW_SOCKET_SEND_WITHOUT_BIND is set to 1 then calling
* FreeRTOS_sendto() on a socket that has not yet been bound will result in the IP
* stack automatically binding the socket to a port number from the range
* socketAUTO_PORT_ALLOCATION_START_NUMBER to 0xffff. If
* ipconfigALLOW_SOCKET_SEND_WITHOUT_BIND is set to 0 then calling FreeRTOS_sendto()
* on a socket that has not yet been bound will result in the send operation being
* aborted. */
#define ipconfigALLOW_SOCKET_SEND_WITHOUT_BIND 1
/* Defines the Time To Live (TTL) values used in outgoing UDP packets. */
#define ipconfigUDP_TIME_TO_LIVE 128
#define ipconfigTCP_TIME_TO_LIVE 128 /* also defined in FreeRTOSIPConfigDefaults.h */
/* USE_TCP: Use TCP and all its features */
#define ipconfigUSE_TCP ( 1 )
/* Use the TCP socket wake context with a callback. */
#define ipconfigSOCKET_HAS_USER_WAKE_CALLBACK_WITH_CONTEXT ( 1 )
/* USE_WIN: Let TCP use windowing mechanism. */
#define ipconfigUSE_TCP_WIN ( 1 )
/* The MTU is the maximum number of bytes the payload of a network frame can
* contain. For normal Ethernet V2 frames the maximum MTU is 1500. Setting a
* lower value can save RAM, depending on the buffer management scheme used. If
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#define ipconfigNETWORK_MTU 1200
/* Set ipconfigUSE_DNS to 1 to include a basic DNS client/resolver. DNS is used
* through the FreeRTOS_gethostbyname() API function. */
#define ipconfigUSE_DNS 1
/* If ipconfigREPLY_TO_INCOMING_PINGS is set to 1 then the IP stack will
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#define ipconfigREPLY_TO_INCOMING_PINGS 1
/* If ipconfigSUPPORT_OUTGOING_PINGS is set to 1 then the
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#define ipconfigSUPPORT_OUTGOING_PINGS 0
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#define ipconfigSUPPORT_SELECT_FUNCTION 1
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#define ipconfigFILTER_OUT_NON_ETHERNET_II_FRAMES 1
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#define ipconfigETHERNET_DRIVER_FILTERS_FRAME_TYPES 1
/* The windows simulator cannot really simulate MAC interrupts, and needs to
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#define configWINDOWS_MAC_INTERRUPT_SIMULATOR_DELAY ( 20 / portTICK_PERIOD_MS )
/* Advanced only: in order to access 32-bit fields in the IP packets with
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#define ipconfigPACKET_FILLER_SIZE 2
/* Define the size of the pool of TCP window descriptors. On the average, each
* TCP socket will use up to 2 x 6 descriptors, meaning that it can have 2 x 6
* outstanding packets (for Rx and Tx). When using up to 10 TP sockets
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#define ipconfigTCP_WIN_SEG_COUNT 240
/* Each TCP socket has a circular buffers for Rx and Tx, which have a fixed
* maximum size. Define the size of Rx buffer for TCP sockets. */
#define ipconfigTCP_RX_BUFFER_LENGTH ( 1000 )
/* Define the size of Tx buffer for TCP sockets. */
#define ipconfigTCP_TX_BUFFER_LENGTH ( 1000 )
/* When using call-back handlers, the driver may check if the handler points to
* real program memory (RAM or flash) or just has a random non-zero value. */
#define ipconfigIS_VALID_PROG_ADDRESS( x ) ( ( x ) != NULL )
/* Include support for TCP hang protection. All sockets in a connecting or
* disconnecting stage will timeout after a period of non-activity. */
#define ipconfigTCP_HANG_PROTECTION ( 1 )
#define ipconfigTCP_HANG_PROTECTION_TIME ( 30 )
/* Include support for TCP keep-alive messages. */
#define ipconfigTCP_KEEP_ALIVE ( 1 )
#define ipconfigTCP_KEEP_ALIVE_INTERVAL ( 20 ) /* in seconds */
#define portINLINE __inline
#endif /* FREERTOS_IP_CONFIG_H */

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<Filter>FreeRTOS\Source\include</Filter>
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<Filter>FreeRTOS\Source\include</Filter>
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<Filter>FreeRTOS\Source\include</Filter>
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<ClInclude Include="..\..\..\FreeRTOS\Source\portable\MSVC-MingW\portmacro.h">
<Filter>FreeRTOS\Source\include</Filter>
</ClInclude>
<ClInclude Include="..\..\..\FreeRTOS-Plus\Source\FreeRTOS-Plus-TCP\include\FreeRTOS_IP_Private.h">
<Filter>FreeRTOS+\FreeRTOS+TCP\include</Filter>
</ClInclude>
<ClInclude Include="..\..\..\FreeRTOS-Plus\Source\FreeRTOS-Plus-TCP\include\NetworkBufferManagement.h">
<Filter>FreeRTOS+\FreeRTOS+TCP\include</Filter>
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<Filter>FreeRTOS+\FreeRTOS+TCP\include</Filter>
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<Filter>FreeRTOS+\FreeRTOS+TCP\include</Filter>
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<Filter>FreeRTOS+\FreeRTOS+TCP\include</Filter>
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<Filter>FreeRTOS+\FreeRTOS+TCP\include</Filter>
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<Filter>FreeRTOS+\FreeRTOS+TCP\include</Filter>
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<Filter>FreeRTOS+\FreeRTOS+TCP\include</Filter>
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<Filter>FreeRTOS+\FreeRTOS+TCP\include</Filter>
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<Filter>FreeRTOS+\FreeRTOS+TCP\include</Filter>
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<Filter>FreeRTOS\Source\include</Filter>
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<Filter>FreeRTOS\Source\include</Filter>
</ClInclude>
<ClInclude Include="..\..\..\Source\Application-Protocols\coreSNTP\source\include\core_sntp_serializer.h">
<Filter>FreeRTOS+\FreeRTOS IoT Libraries\standard\coreSNTP\include</Filter>
</ClInclude>
<ClInclude Include="..\..\..\Source\Application-Protocols\coreSNTP\source\include\core_sntp_client.h">
<Filter>FreeRTOS+\FreeRTOS IoT Libraries\standard\coreSNTP\include</Filter>
</ClInclude>
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<Filter>FreeRTOS+\FreeRTOS+TCP\include</Filter>
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<Filter>FreeRTOS+\FreeRTOS IoT Libraries\standard\coreSNTP\include</Filter>
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<Filter>FreeRTOS+\FreeRTOS IoT Libraries\platform\backoff_algorithm\include</Filter>
</ClInclude>
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<Filter>FreeRTOS+\FreeRTOS IoT Libraries\platform\logging</Filter>
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<Filter>FreeRTOS+\FreeRTOS IoT Libraries\platform\logging</Filter>
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<Filter>Config</Filter>
</ClInclude>
</ItemGroup>
</Project>

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/*
* FreeRTOS V202104.00
* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* http://www.FreeRTOS.org
* http://aws.amazon.com/freertos
*/
#ifndef COMMON_DEMO_INCLUDE_H
#define COMMON_DEMO_INCLUDE_H
#include "demo_config.h"
/**
* @brief Utility macro to convert milliseconds to the fractions value of an SNTP timestamp.
* @note The fractions value MUST be less than 1000 as duration of seconds is not represented
* as fractions part of SNTP timestamp.
*/
#define MILLISECONDS_TO_SNTP_FRACTIONS( ms ) ( ms * 1000 * SNTP_FRACTION_VALUE_PER_MICROSECOND )
/**
* @brief Type representing system time in Coordinated Universal Time (UTC)
* zone as time since 1st January 1970 00h:00m:00s.
*
* @note This demo uses RAM-based mathematical model to represent UTC time
* in system.
*/
typedef struct UTCTime
{
uint32_t secs;
uint32_t msecs;
} UTCTime_t;
/**
* @brief Utility function to print the system time as both UNIX time (i.e.
* time since 1st January 1970 00h:00m:00s) and human-readable time (in the
* YYYY-MM-DD dd:mm:ss format).
*
* @param[in] pTime The system time to be printed.
*/
void printTime( const UTCTime_t * pTime );
/**
* @brief Initializes the system clock with the first second of the year (i.e. at midnight
* of 1st January) that is configured in the democonfigSYSTEM_START_YEAR config of
* demo_config.h file.
*/
void initializeSystemClock( void );
/**
* @brief The demo function for an application to query wall-clock
* time as Coordinated Universal Time (UTC) from the system.
*
* @note This demo showcases a RAM-based mathematical model for
* representing current UTC time in the system.
*
* @param[out] pTime This will be populated with the current time
* in the system as total time since 1st January 1900 00h:00m:00s.
*/
void systemGetWallClockTime( UTCTime_t * pTime );
/**
* @brief The task function for a sample application that queries
* system time periodically.
*/
void sampleAppTask( void * pvParameters );
/**
* @brief The task function that represents a daemon SNTP client task
* that is responsible for periodically synchronizing system time with
* time servers from the list of configured time servers in
* democonfigLIST_OF_TIME_SERVERS.
*
* @note The usage of the coreSNTP library API is encapsulated within
* this task. The rest of the FreeRTOS tasks/application does not need
* to be aware of the SNTP client as they can query time from the
* @ref systemGetWallClockTime() function.
*/
void sntpTask( void * parameters );
#endif /* ifndef COMMON_DEMO_INCLUDE_H */

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/*
* FreeRTOS V202104.00
* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* http://www.FreeRTOS.org
* http://aws.amazon.com/freertos
*/
#ifndef CORE_SNTP_CONFIG_H
#define CORE_SNTP_CONFIG_H
/**************************************************/
/******* DO NOT CHANGE the following order ********/
/**************************************************/
/* Include logging header files and define logging macros in the following order:
* 1. Include the header file "logging_levels.h".
* 2. Define the LIBRARY_LOG_NAME and LIBRARY_LOG_LEVEL macros depending on
* the logging configuration for SNTP.
* 3. Include the header file "logging_stack.h", if logging is enabled for SNTP.
*/
#include "logging_levels.h"
/* Logging configuration for the SNTP library. */
#ifndef LIBRARY_LOG_NAME
#define LIBRARY_LOG_NAME "SNTP"
#endif
#ifndef LIBRARY_LOG_LEVEL
#define LIBRARY_LOG_LEVEL LOG_ERROR
#endif
/* Prototype for the function used to print to console on Windows simulator
* of FreeRTOS.
* The function prints to the console before the network is connected;
* then a UDP port after the network has connected. */
extern void vLoggingPrintf( const char * pcFormatString,
... );
/* Map the SdkLog macro to the logging function to enable logging
* on Windows simulator. */
#ifndef SdkLog
#define SdkLog( message ) vLoggingPrintf message
#endif
#include "logging_stack.h"
/************ End of logging configuration ****************/
#endif /* ifndef CORE_SNTP_CONFIG_H */

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Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio Version 16
VisualStudioVersion = 16.0.29215.179
MinimumVisualStudioVersion = 10.0.40219.1
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "RTOSDemo", "WIN32.vcxproj", "{C686325E-3261-42F7-AEB1-DDE5280E1CEB}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|Win32 = Debug|Win32
EndGlobalSection
GlobalSection(ProjectConfigurationPlatforms) = postSolution
{C686325E-3261-42F7-AEB1-DDE5280E1CEB}.Debug|Win32.ActiveCfg = Debug|Win32
{C686325E-3261-42F7-AEB1-DDE5280E1CEB}.Debug|Win32.Build.0 = Debug|Win32
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE
EndGlobalSection
GlobalSection(ExtensibilityGlobals) = postSolution
SolutionGuid = {150F08BF-9D61-4CC2-8DBF-1335172A1EA4}
EndGlobalSection
GlobalSection(TestCaseManagementSettings) = postSolution
CategoryFile = FreeRTOS_Plus_TCP_Minimal.vsmdi
EndGlobalSection
EndGlobal

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/*
* FreeRTOS V202104.00
* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* http://www.FreeRTOS.org
* http://aws.amazon.com/freertos
*
* 1 tab == 4 spaces!
*/
#ifndef DEMO_CONFIG_H
#define DEMO_CONFIG_H
/**************************************************/
/******* DO NOT CHANGE the following order ********/
/**************************************************/
/* Include logging header files and define logging macros in the following order:
* 1. Include the header file "logging_levels.h".
* 2. Define the LIBRARY_LOG_NAME and LIBRARY_LOG_LEVEL macros depending on
* the logging configuration for DEMO.
* 3. Include the header file "logging_stack.h", if logging is enabled for DEMO.
*/
#include "logging_levels.h"
/* Logging configuration for the Demo. */
#ifndef LIBRARY_LOG_NAME
#define LIBRARY_LOG_NAME "SNTPDemo"
#endif
#ifndef LIBRARY_LOG_LEVEL
#define LIBRARY_LOG_LEVEL LOG_INFO
#endif
/* Prototype for the function used to print to console on Windows simulator
* of FreeRTOS.
* The function prints to the console before the network is connected;
* then a UDP port after the network has connected. */
extern void vLoggingPrintf( const char * pcFormatString,
... );
/* Map the SdkLog macro to the logging function to enable logging
* on Windows simulator. */
#ifndef SdkLog
#define SdkLog( message ) vLoggingPrintf message
#endif
#include "logging_stack.h"
/************ End of logging configuration ****************/
/**
* @brief The desired accuracy (in milliseconds) of system clock in relation with internet time.
* In other words, this is the maximum tolerance desired for clock drift in the system.
*/
#define democonfigDESIRED_CLOCK_ACCURACY_MS ( 1000 )
/**
* @brief The system clock tolerance (in parts per million) that represents the rate of clock
* drift of the system. The rate can be viewed as the system clock drift that occurs as milliseconds
* per second.
*
* @note In systems with a HW oscillator based clock, the frequency tolerance can be obtained from the
* hardware specification of the clock oscillator.
* @note This demo DOES NOT use a hardware clock oscillator as it runs on Windows Simulator. The configuration
* ONLY provides the user to view the impact of the settings for "Clock Tolerance" and "Desired
* Clock Accuracy" configurations on the calculated "SNTP polling period".
*/
#define democonfigSYSTEM_CLOCK_TOLERANCE_PPM ( 32000 )
/**
* @brief The set of time servers, in decreasing order of priority, for configuring the SNTP client.
* The servers SHOULD be listed as comma-separated list of strings. For example, the following
* can be a configuration used:
*/
#define democonfigLIST_OF_TIME_SERVERS "time.cloudflare.com", "pool.ntp.org"
/**
* @brief The year to bake in the demo application for initializing the system clock with.
* The demo initializes the system clock time for the starting second of the 1st January of
* the configured year. So for example, with a configuration of year 2021, the demo will
* initialize the system clock time as 1st January 2021 00h:00m:00s.
*
* @note The coreSNTP library REQUIRES that the client system time is within ~68 years of internet
* time. Thus, for systems that do not have an Real-Time Clock module, this demo shows how
* a starting time can be baked in the device firmware to keep the starting time of the system
* close to actual time on the first boot-up of device.
* For such systems without Real-Time Clock module, all device boot ups from subsequent device resets
* or power cycles can continue to carry close to correct time by EITHER
* * (RECOMMENDED) Saving the most recent time in non-volatile memory
* OR
* * Using the same firmware baked-in starting time of device for every boot-up.
*/
#define democonfigSYSTEM_START_YEAR ( 2021 )
/**
* @brief The timeout (in milliseconds) for the time response to a time request made to a
* time server.
*/
#define democonfigSERVER_RESPONSE_TIMEOUT_MS ( 5000 )
/**
* @brief Set the stack size of the main demo task.
*
* In the Windows port, this stack only holds a structure. The actual
* stack is created by an operating system thread.
*/
#define democonfigDEMO_STACKSIZE configMINIMAL_STACK_SIZE
#endif /* DEMO_CONFIG_H */

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/*
* FreeRTOS V202104.00
* Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
/***
* See https://www.FreeRTOS.org/coresntp for configuration and usage instructions,
***/
/* Standard includes. */
#include <stdio.h>
#include <time.h>
/* Visual studio intrinsics used so the __debugbreak() function is available
* should an assert get hit. */
#include <intrin.h>
/* FreeRTOS includes. */
#include <FreeRTOS.h>
#include "task.h"
/* TCP/IP stack includes. */
#include "FreeRTOS_IP.h"
#include "FreeRTOS_Sockets.h"
/* Demo logging includes. */
#include "logging.h"
/* Demo Specific configs. */
#include "demo_config.h"
#include "common_demo_include.h"
/*
* Prototypes for the demos that can be started from this project. Note the
* SNTP demo is not actually started until the network is already, which is
* indicated by vApplicationIPNetworkEventHook() executing - hence
* prvStartSimpleSNTPDemo() is called from inside vApplicationIPNetworkEventHook().
*/
static void vStartSntpDemo( void );
/*
* Just seeds the simple pseudo random number generator.
*
* !!! NOTE !!!
* This is not a secure method of generating random numbers and production
* devices should use a true random number generator (TRNG).
*/
static void prvSRand( UBaseType_t ulSeed );
/*
* Miscellaneous initialization including preparing the logging and seeding the
* random number generator.
*/
static void prvMiscInitialisation( void );
/* The default IP and MAC address used by the demo. The address configuration
* defined here will be used if ipconfigUSE_DHCP is 0, or if ipconfigUSE_DHCP is
* 1 but a DHCP server could not be contacted. See the online documentation for
* more information. */
static const uint8_t ucIPAddress[ 4 ] = { configIP_ADDR0, configIP_ADDR1, configIP_ADDR2, configIP_ADDR3 };
static const uint8_t ucNetMask[ 4 ] = { configNET_MASK0, configNET_MASK1, configNET_MASK2, configNET_MASK3 };
static const uint8_t ucGatewayAddress[ 4 ] = { configGATEWAY_ADDR0, configGATEWAY_ADDR1, configGATEWAY_ADDR2, configGATEWAY_ADDR3 };
static const uint8_t ucDNSServerAddress[ 4 ] = { configDNS_SERVER_ADDR0, configDNS_SERVER_ADDR1, configDNS_SERVER_ADDR2, configDNS_SERVER_ADDR3 };
/* Set the following constant to pdTRUE to log using the method indicated by the
* name of the constant, or pdFALSE to not log using the method indicated by the
* name of the constant. Options include to standard out (xLogToStdout), to a disk
* file (xLogToFile), and to a UDP port (xLogToUDP). If xLogToUDP is set to pdTRUE
* then UDP messages are sent to the IP address configured as the UDP logging server
* address (see the configUDP_LOGGING_ADDR0 definitions in FreeRTOSConfig.h) and
* the port number set by configPRINT_PORT in FreeRTOSConfig.h. */
const BaseType_t xLogToStdout = pdTRUE, xLogToFile = pdFALSE, xLogToUDP = pdFALSE;
/* Default MAC address configuration. The demo creates a virtual network
* connection that uses this MAC address by accessing the raw Ethernet data
* to and from a real network connection on the host PC. See the
* configNETWORK_INTERFACE_TO_USE definition for information on how to configure
* the real network connection to use. */
const uint8_t ucMACAddress[ 6 ] = { configMAC_ADDR0, configMAC_ADDR1, configMAC_ADDR2, configMAC_ADDR3, configMAC_ADDR4, configMAC_ADDR5 };
/* Use by the pseudo random number generator. */
static UBaseType_t ulNextRand;
/*-----------------------------------------------------------*/
int main( void )
{
/***
* See https://www.FreeRTOS.org/coresntp for configuration and usage instructions.
*
***/
/* Miscellaneous initialization including preparing the logging and seeding
* the random number generator. */
prvMiscInitialisation();
/* Initialize the network interface.
*
***NOTE*** Tasks that use the network are created in the network event hook
* when the network is connected and ready for use (see the implementation of
* vApplicationIPNetworkEventHook() below). The address values passed in here
* are used if ipconfigUSE_DHCP is set to 0, or if ipconfigUSE_DHCP is set to 1
* but a DHCP server cannot be contacted. */
FreeRTOS_IPInit( ucIPAddress, ucNetMask, ucGatewayAddress, ucDNSServerAddress, ucMACAddress );
/* Start the RTOS scheduler. */
vTaskStartScheduler();
/* If all is well, the scheduler will now be running, and the following
* line will never be reached. If the following line does execute, then
* there was insufficient FreeRTOS heap memory available for the idle and/or
* timer tasks to be created. See the memory management section on the
* FreeRTOS web site for more details (this is standard text that is not
* really applicable to the Win32 simulator port). */
for( ; ; )
{
__debugbreak();
}
}
/*-----------------------------------------------------------*/
/**
* @brief Entry point of the demo that creates 2 tasks:
* 1. One task represents the SNTP client that periodically synchronizes system time with
* time from time servers.
* 2. The other task represents a sample application time that queries the system time
* periodically and prints it in human readable form of the YYYY-MM-DD hh:mm:ss.
*/
void vStartSntpDemo( void )
{
initializeSystemClock();
/* Create the SNTP client task that is responsible for synchronizing system time with the time servers
* periodically. This is created as a high priority task to keep the SNTP client operation unhindered. */
xTaskCreate( sntpTask, /* Function that implements the task. */
"SntpClientTask", /* Text name for the task - only used for debugging. */
democonfigDEMO_STACKSIZE, /* Size of stack (in words, not bytes) to allocate for the task. */
NULL, /* Task parameter - not used in this case. */
configMAX_PRIORITIES - 1, /* Task priority, must be between 0 and configMAX_PRIORITIES - 1. */
NULL );
/* Create the task that represents an application needing wall-clock time. */
xTaskCreate( sampleAppTask, /* Function that implements the task. */
"SampleAppTask", /* Text name for the task - only used for debugging. */
democonfigDEMO_STACKSIZE, /* Size of stack (in words, not bytes) to allocate for the task. */
NULL, /* Task parameter - not used in this case. */
tskIDLE_PRIORITY, /* Task priority, must be between 0 and configMAX_PRIORITIES - 1. */
NULL ); /* Used to pass out a handle to the created task - not used in this case. */
}
/*-----------------------------------------------------------*/
/* Called by FreeRTOS+TCP when the network connects or disconnects. Disconnect
* events are only received if implemented in the MAC driver. */
void vApplicationIPNetworkEventHook( eIPCallbackEvent_t eNetworkEvent )
{
uint32_t ulIPAddress, ulNetMask, ulGatewayAddress, ulDNSServerAddress;
char cBuffer[ 16 ];
static BaseType_t xTasksAlreadyCreated = pdFALSE;
/* If the network has just come up...*/
if( eNetworkEvent == eNetworkUp )
{
/* Create the tasks that use the IP stack if they have not already been
* created. */
if( xTasksAlreadyCreated == pdFALSE )
{
/* Demos that use the network are created after the network is
* up. */
LogInfo( ( "---------STARTING DEMO---------\r\n" ) );
vStartSntpDemo();
xTasksAlreadyCreated = pdTRUE;
}
/* Print out the network configuration, which may have come from a DHCP
* server. */
FreeRTOS_GetAddressConfiguration( &ulIPAddress, &ulNetMask, &ulGatewayAddress, &ulDNSServerAddress );
FreeRTOS_inet_ntoa( ulIPAddress, cBuffer );
LogInfo( ( "\r\n\r\nIP Address: %s\r\n", cBuffer ) );
FreeRTOS_inet_ntoa( ulNetMask, cBuffer );
LogInfo( ( "Subnet Mask: %s\r\n", cBuffer ) );
FreeRTOS_inet_ntoa( ulGatewayAddress, cBuffer );
LogInfo( ( "Gateway Address: %s\r\n", cBuffer ) );
FreeRTOS_inet_ntoa( ulDNSServerAddress, cBuffer );
LogInfo( ( "DNS Server Address: %s\r\n\r\n\r\n", cBuffer ) );
}
}
/*-----------------------------------------------------------*/
void vAssertCalled( const char * pcFile,
uint32_t ulLine )
{
volatile uint32_t ulBlockVariable = 0UL;
volatile char * pcFileName = ( volatile char * ) pcFile;
volatile uint32_t ulLineNumber = ulLine;
( void ) pcFileName;
( void ) ulLineNumber;
printf( "vAssertCalled( %s, %u\n", pcFile, ulLine );
/* Setting ulBlockVariable to a non-zero value in the debugger will allow
* this function to be exited. */
taskDISABLE_INTERRUPTS();
{
while( ulBlockVariable == 0UL )
{
__debugbreak();
}
}
taskENABLE_INTERRUPTS();
}
/*-----------------------------------------------------------*/
UBaseType_t uxRand( void )
{
const uint32_t ulMultiplier = 0x015a4e35UL, ulIncrement = 1UL;
/*
* Utility function to generate a pseudo random number.
*
* !!!NOTE!!!
* This is not a secure method of generating a random number. Production
* devices should use a True Random Number Generator (TRNG).
*/
ulNextRand = ( ulMultiplier * ulNextRand ) + ulIncrement;
return( ( int ) ( ulNextRand >> 16UL ) & 0x7fffUL );
}
/*-----------------------------------------------------------*/
static void prvSRand( UBaseType_t ulSeed )
{
/* Utility function to seed the pseudo random number generator. */
ulNextRand = ulSeed;
}
/*-----------------------------------------------------------*/
static void prvMiscInitialisation( void )
{
time_t xTimeNow;
uint32_t ulLoggingIPAddress;
ulLoggingIPAddress = FreeRTOS_inet_addr_quick( configUDP_LOGGING_ADDR0, configUDP_LOGGING_ADDR1, configUDP_LOGGING_ADDR2, configUDP_LOGGING_ADDR3 );
vLoggingInit( xLogToStdout, xLogToFile, xLogToUDP, ulLoggingIPAddress, configPRINT_PORT );
/*
* Seed random number generator.
*
* !!!NOTE!!!
* This is not a secure method of generating a random number. Production
* devices should use a True Random Number Generator (TRNG).
*/
time( &xTimeNow );
LogDebug( ( "Seed for randomizer: %lu\n", xTimeNow ) );
prvSRand( ( uint32_t ) xTimeNow );
LogDebug( ( "Random numbers: %08X %08X %08X %08X\n", ipconfigRAND32(), ipconfigRAND32(), ipconfigRAND32(), ipconfigRAND32() ) );
}
/*-----------------------------------------------------------*/
#if ( ipconfigUSE_LLMNR != 0 ) || ( ipconfigUSE_NBNS != 0 ) || ( ipconfigDHCP_REGISTER_HOSTNAME == 1 )
const char * pcApplicationHostnameHook( void )
{
/* Assign the name "FreeRTOS" to this network node. This function will
* be called during the DHCP: the machine will be registered with an IP
* address plus this name. */
return mainHOST_NAME;
}
#endif
/*-----------------------------------------------------------*/
#if ( ipconfigUSE_LLMNR != 0 ) || ( ipconfigUSE_NBNS != 0 )
BaseType_t xApplicationDNSQueryHook( const char * pcName )
{
BaseType_t xReturn;
/* Determine if a name lookup is for this node. Two names are given
* to this node: that returned by pcApplicationHostnameHook() and that set
* by mainDEVICE_NICK_NAME. */
if( _stricmp( pcName, pcApplicationHostnameHook() ) == 0 )
{
xReturn = pdPASS;
}
else if( _stricmp( pcName, mainDEVICE_NICK_NAME ) == 0 )
{
xReturn = pdPASS;
}
else
{
xReturn = pdFAIL;
}
return xReturn;
}
#endif /* if ( ipconfigUSE_LLMNR != 0 ) || ( ipconfigUSE_NBNS != 0 ) */
/*-----------------------------------------------------------*/
/*
* Callback that provides the inputs necessary to generate a randomized TCP
* Initial Sequence Number per RFC 6528. THIS IS ONLY A DUMMY IMPLEMENTATION
* THAT RETURNS A PSEUDO RANDOM NUMBER SO IS NOT INTENDED FOR USE IN PRODUCTION
* SYSTEMS.
*/
extern uint32_t ulApplicationGetNextSequenceNumber( uint32_t ulSourceAddress,
uint16_t usSourcePort,
uint32_t ulDestinationAddress,
uint16_t usDestinationPort )
{
( void ) ulSourceAddress;
( void ) usSourcePort;
( void ) ulDestinationAddress;
( void ) usDestinationPort;
return uxRand();
}
/*-----------------------------------------------------------*/
/*
* Set *pulNumber to a random number, and return pdTRUE. When the random number
* generator is broken, it shall return pdFALSE.
* The macros ipconfigRAND32() and configRAND32() are not in use
* anymore in FreeRTOS+TCP.
*
* THIS IS ONLY A DUMMY IMPLEMENTATION THAT RETURNS A PSEUDO RANDOM NUMBER SO IS
* NOT INTENDED FOR USE IN PRODUCTION SYSTEMS.
*/
BaseType_t xApplicationGetRandomNumber( uint32_t * pulNumber )
{
*pulNumber = uxRand();
return pdTRUE;
}
/*-----------------------------------------------------------*/
/* configUSE_STATIC_ALLOCATION is set to 1, so the application must provide an
* implementation of vApplicationGetIdleTaskMemory() to provide the memory that is
* used by the Idle task. */
void vApplicationGetIdleTaskMemory( StaticTask_t ** ppxIdleTaskTCBBuffer,
StackType_t ** ppxIdleTaskStackBuffer,
uint32_t * pulIdleTaskStackSize )
{
/* If the buffers to be provided to the Idle task are declared inside this
* function then they must be declared static - otherwise they will be allocated on
* the stack and so not exists after this function exits. */
static StaticTask_t xIdleTaskTCB;
static StackType_t uxIdleTaskStack[ configMINIMAL_STACK_SIZE ];
/* Pass out a pointer to the StaticTask_t structure in which the Idle task's
* state will be stored. */
*ppxIdleTaskTCBBuffer = &xIdleTaskTCB;
/* Pass out the array that will be used as the Idle task's stack. */
*ppxIdleTaskStackBuffer = uxIdleTaskStack;
/* Pass out the size of the array pointed to by *ppxIdleTaskStackBuffer.
* Note that, as the array is necessarily of type StackType_t,
* configMINIMAL_STACK_SIZE is specified in words, not bytes. */
*pulIdleTaskStackSize = configMINIMAL_STACK_SIZE;
}
/*-----------------------------------------------------------*/
/* configUSE_STATIC_ALLOCATION and configUSE_TIMERS are both set to 1, so the
* application must provide an implementation of vApplicationGetTimerTaskMemory()
* to provide the memory that is used by the Timer service task. */
void vApplicationGetTimerTaskMemory( StaticTask_t ** ppxTimerTaskTCBBuffer,
StackType_t ** ppxTimerTaskStackBuffer,
uint32_t * pulTimerTaskStackSize )
{
/* If the buffers to be provided to the Timer task are declared inside this
* function then they must be declared static - otherwise they will be allocated on
* the stack and so not exists after this function exits. */
static StaticTask_t xTimerTaskTCB;
static StackType_t uxTimerTaskStack[ configTIMER_TASK_STACK_DEPTH ];
/* Pass out a pointer to the StaticTask_t structure in which the Timer
* task's state will be stored. */
*ppxTimerTaskTCBBuffer = &xTimerTaskTCB;
/* Pass out the array that will be used as the Timer task's stack. */
*ppxTimerTaskStackBuffer = uxTimerTaskStack;
/* Pass out the size of the array pointed to by *ppxTimerTaskStackBuffer.
* Note that, as the array is necessarily of type StackType_t,
* configMINIMAL_STACK_SIZE is specified in words, not bytes. */
*pulTimerTaskStackSize = configTIMER_TASK_STACK_DEPTH;
}
/*-----------------------------------------------------------*/

5
FreeRTOS-Plus/Demo/coreSNTP_Windows_Simulator/readme.url
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@ -0,0 +1,5 @@
[{000214A0-0000-0000-C000-000000000046}]
Prop3=19,11
[InternetShortcut]
IDList=
URL=https://www.freertos.org/sntp/sntp-demo.html

1
FreeRTOS-Plus/Source/Application-Protocols/coreSNTP

@ -0,0 +1 @@
Subproject commit cbf2696387a91267427c30554140fd5cead2f3dd

36
lexicon.txt
Unescape Escape View File

@ -71,6 +71,7 @@ backoffalgorithm
balternatesetting
baltimore
barry
basetime
basetype
bauddiv
baudrate
@ -158,6 +159,10 @@ burtcmodeem
busfault
buttonisr
bvic
bytesreceived
bytesreceived
bytessent
bytessent
bytestorecv
bytestosend
bytestring
@ -365,6 +370,7 @@ copybrief
corehttp
coremqtt
corepkcs
coresntp
coretasks
corextend
correctl
@ -677,6 +683,7 @@ fcs
fd
fde
fe
february
fec
ferr
ff
@ -807,6 +814,7 @@ hetreg
hfclk
hfrco
hfxo
hh
hidef
hifive
hkdf
@ -955,6 +963,7 @@ iproduct
iram
irda
iret
ireturned
irom
irq
irqchannelpreemptionpriority
@ -980,6 +989,8 @@ itm
itteratio
itu
ivr
jan
january
javascript
jefferson
jitp
@ -1005,6 +1016,7 @@ kickstart
knowns
kx
lapic
lastsynctickcount
latestversion
lathclr
lathinv
@ -1308,6 +1320,7 @@ nullptr
num
numaker
numberofitems
numofservers
nvic
nvs
ocd
@ -1385,6 +1398,7 @@ pasv
pathlen
payloadlength
pb
pbasetime
pbclk
pbuf
pbuffer
@ -1439,6 +1453,7 @@ pcnewdir
pcommandtorelease
pcommandtosend
pcontext
pcontextbuffer
pcoverflowedtask
pcpath
pcpayload
@ -1465,6 +1480,7 @@ pctransmittedstring
pctxbuffer
pcurl
pcurldata
pcurrenttime
pcwritebuffer
pd
pdata
@ -1759,6 +1775,7 @@ prvsimplezerocopyudpclienttask
prvsingletasktests
prvskipnamefield
prvstartsimplemqttdemo
prvstartsimplesntpdemo
prvstartstoptracecommand
prvstatcommand
prvstatfscommand
@ -1810,6 +1827,9 @@ ptal
ptcpsocket
pth
pthingname
ptime
ptimeserver
ptimeservers
ptm
ptopicfilter
ptp
@ -1843,6 +1863,7 @@ pucstreambufferstoragearea
pucstring
puctxbuffer
pucudppayloadbuffer
pudpcontext
pul
pulcount
puldigestlen
@ -2050,6 +2071,7 @@ rng
rnto
ro
robotronics
rollover
rom
rootca
rootcasize
@ -2097,6 +2119,8 @@ safertos
sam
sama
samd
sampleapp
sampleapptask
santity
sarecomtesttasksstillrunning
saveall
@ -2141,7 +2165,9 @@ serinterrupt
serput
sersource
sertx
serveraddr
serverhost
serverport
setbaudratevalue
setfaketaskpriority
setimagestate
@ -2177,6 +2203,7 @@ simultaniously
singletasks
sizeof
sk
slewrate
slibxr
smc
smclk
@ -2185,6 +2212,9 @@ smt
snextcheckvariable
sni
snprintf
sntp
sntpclienttask
sntptask
soc
sockaddr
socketauto
@ -2201,6 +2231,7 @@ sr
sram
src
sren
ss
sscanf
ssi
ssitask
@ -2268,6 +2299,7 @@ sysclk
sysinit
syst
systemcoreclock
systemgetwallclocktime
systeminit
systeminithook
systemirqhandler
@ -2625,6 +2657,7 @@ usthingnamelength
ustopicfilterlength
ustotallength
utalised
utc
utest
util
utilise
@ -3316,7 +3349,8 @@ xyieldpending
xyieldrequired
yrdkrl
yrpbrl
yyyy
yyyymmddhhmmss
zc
zer
zynq
zynq

7
manifest.yml
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@ -101,4 +101,11 @@ dependencies:
url: "https://github.com/aws/ota-for-aws-iot-embedded-sdk"
path: "FreeRTOS-Plus/Source/AWS/ota"
- name: "coreSNTP"
version: "v1.0.0"
repository:
type: "git"
url: "https://github.com/FreeRTOS/coreSNTP"
path: "FreeRTOS-Plus/Source/Application-Protocols/coreSNTP"
license: "MIT"

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