RIS-V_RV32_SiFive_HiFive1_GCC project now running the blinky demo - still a work in progress.
Richard Barry
5 years ago
parent
dbac79045c
commit
71d9450836
@ -0,0 +1,205 @@
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/*
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* FreeRTOS Kernel V10.2.1
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* Copyright (C) 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* http://www.FreeRTOS.org
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* http://aws.amazon.com/freertos
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*
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* 1 tab == 4 spaces!
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*/
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/******************************************************************************
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* NOTE 1: This project provides two demo applications. A simple blinky
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* style project, and a more comprehensive test and demo application. The
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* mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting in main.c is used to select
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* between the two. See the notes on using mainCREATE_SIMPLE_BLINKY_DEMO_ONLY
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* in main.c. This file implements the simply blinky style version.
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*
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* NOTE 2: This file only contains the source code that is specific to the
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* basic demo. Generic functions, such FreeRTOS hook functions, and functions
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* required to configure the hardware are defined in main.c.
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******************************************************************************
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*
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* main_blinky() creates one queue, and two tasks. It then starts the
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* scheduler.
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*
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* The Queue Send Task:
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* The queue send task is implemented by the prvQueueSendTask() function in
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* this file. prvQueueSendTask() sits in a loop that causes it to repeatedly
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* block for 1000 milliseconds, before sending the value 100 to the queue that
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* was created within main_blinky(). Once the value is sent, the task loops
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* back around to block for another 1000 milliseconds...and so on.
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*
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* The Queue Receive Task:
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* The queue receive task is implemented by the prvQueueReceiveTask() function
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* in this file. prvQueueReceiveTask() sits in a loop where it repeatedly
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* blocks on attempts to read data from the queue that was created within
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* main_blinky(). When data is received, the task checks the value of the
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* data, and if the value equals the expected 100, writes 'Blink' to the UART
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* (the UART is used in place of the LED to allow easy execution in QEMU). The
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* 'block time' parameter passed to the queue receive function specifies that
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* the task should be held in the Blocked state indefinitely to wait for data to
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* be available on the queue. The queue receive task will only leave the
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* Blocked state when the queue send task writes to the queue. As the queue
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* send task writes to the queue every 1000 milliseconds, the queue receive
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* task leaves the Blocked state every 1000 milliseconds, and therefore toggles
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* the LED every 200 milliseconds.
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*/
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/* Standard includes. */
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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/* Kernel includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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#include "queue.h"
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/* Priorities used by the tasks. */
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#define mainQUEUE_RECEIVE_TASK_PRIORITY ( tskIDLE_PRIORITY + 2 )
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#define mainQUEUE_SEND_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )
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/* The rate at which data is sent to the queue. The 200ms value is converted
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to ticks using the pdMS_TO_TICKS() macro. */
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#define mainQUEUE_SEND_FREQUENCY_MS pdMS_TO_TICKS( 1000 )
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/* The maximum number items the queue can hold. The priority of the receiving
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task is above the priority of the sending task, so the receiving task will
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preempt the sending task and remove the queue items each time the sending task
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writes to the queue. Therefore the queue will never have more than one item in
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it at any time, and even with a queue length of 1, the sending task will never
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find the queue full. */
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#define mainQUEUE_LENGTH ( 1 )
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/*-----------------------------------------------------------*/
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/*
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* Called by main when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 1 in
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* main.c.
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*/
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void main_blinky( void );
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/*
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* The tasks as described in the comments at the top of this file.
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*/
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static void prvQueueReceiveTask( void *pvParameters );
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static void prvQueueSendTask( void *pvParameters );
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/*-----------------------------------------------------------*/
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/* The queue used by both tasks. */
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static QueueHandle_t xQueue = NULL;
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/*-----------------------------------------------------------*/
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void main_blinky( void )
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{
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/* Create the queue. */
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xQueue = xQueueCreate( mainQUEUE_LENGTH, sizeof( uint32_t ) );
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if( xQueue != NULL )
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{
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/* Start the two tasks as described in the comments at the top of this
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file. */
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xTaskCreate( prvQueueReceiveTask, /* The function that implements the task. */
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"Rx", /* The text name assigned to the task - for debug only as it is not used by the kernel. */
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configMINIMAL_STACK_SIZE * 2U, /* The size of the stack to allocate to the task. */
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NULL, /* The parameter passed to the task - not used in this case. */
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mainQUEUE_RECEIVE_TASK_PRIORITY, /* The priority assigned to the task. */
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NULL ); /* The task handle is not required, so NULL is passed. */
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xTaskCreate( prvQueueSendTask, "TX", configMINIMAL_STACK_SIZE * 2U, NULL, mainQUEUE_SEND_TASK_PRIORITY, NULL );
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/* Start the tasks and timer running. */
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vTaskStartScheduler();
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}
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/* If all is well, the scheduler will now be running, and the following
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line will never be reached. If the following line does execute, then
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there was insufficient FreeRTOS heap memory available for the Idle and/or
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timer tasks to be created. See the memory management section on the
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FreeRTOS web site for more details on the FreeRTOS heap
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http://www.freertos.org/a00111.html. */
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for( ;; );
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}
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/*-----------------------------------------------------------*/
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static void prvQueueSendTask( void *pvParameters )
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{
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TickType_t xNextWakeTime;
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const unsigned long ulValueToSend = 100UL;
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BaseType_t xReturned;
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/* Remove compiler warning about unused parameter. */
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( void ) pvParameters;
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/* Initialise xNextWakeTime - this only needs to be done once. */
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xNextWakeTime = xTaskGetTickCount();
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for( ;; )
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{
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/* Place this task in the blocked state until it is time to run again. */
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vTaskDelayUntil( &xNextWakeTime, mainQUEUE_SEND_FREQUENCY_MS );
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/* Send to the queue - causing the queue receive task to unblock and
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toggle the LED. 0 is used as the block time so the sending operation
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will not block - it shouldn't need to block as the queue should always
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be empty at this point in the code. */
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xReturned = xQueueSend( xQueue, &ulValueToSend, 0U );
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configASSERT( xReturned == pdPASS );
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}
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}
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/*-----------------------------------------------------------*/
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static void prvQueueReceiveTask( void *pvParameters )
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{
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unsigned long ulReceivedValue;
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const unsigned long ulExpectedValue = 100UL;
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const char * const pcPassMessage = "Blink\r\n";
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const char * const pcFailMessage = "Unexpected value received\r\n";
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extern void vToggleLED( void );
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/* Remove compiler warning about unused parameter. */
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( void ) pvParameters;
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for( ;; )
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{
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/* Wait until something arrives in the queue - this task will block
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indefinitely provided INCLUDE_vTaskSuspend is set to 1 in
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FreeRTOSConfig.h. */
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xQueueReceive( xQueue, &ulReceivedValue, portMAX_DELAY );
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/* To get here something must have been received from the queue, but
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is it the expected value? If it is, toggle the LED. */
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if( ulReceivedValue == ulExpectedValue )
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{
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write( STDOUT_FILENO, pcPassMessage, strlen( pcPassMessage ) );
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vToggleLED();
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ulReceivedValue = 0U;
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}
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else
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{
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write( STDOUT_FILENO, pcFailMessage, strlen( pcFailMessage ) );
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}
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}
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}
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/*-----------------------------------------------------------*/
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@ -1,3 +0,0 @@
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This source repository is release under Apache2 and MIT licenses.
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See LICENSE.Apache2 and LICENSE.MIT for details.
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@ -1,202 +0,0 @@
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|
||||
DEALINGS IN THE SOFTWARE.
|
||||
@ -1,2 +0,0 @@
|
||||
# sifive-welcome
|
||||
A simple welcome example which prints SiFive banner and uses board LEDs
|
||||
@ -1,158 +0,0 @@
|
||||
/* Copyright 2019 SiFive, Inc */
|
||||
/* SPDX-License-Identifier: Apache-2.0 */
|
||||
|
||||
#include <stdio.h>
|
||||
#include <metal/cpu.h>
|
||||
#include <metal/led.h>
|
||||
#include <metal/button.h>
|
||||
#include <metal/switch.h>
|
||||
|
||||
#define RTC_FREQ 32768
|
||||
|
||||
struct metal_cpu *cpu0;
|
||||
struct metal_interrupt *cpu_intr, *tmr_intr;
|
||||
int tmr_id;
|
||||
volatile uint32_t timer_isr_flag;
|
||||
|
||||
void display_banner (void) {
|
||||
|
||||
printf("\n");
|
||||
printf("\n");
|
||||
printf(" SIFIVE, INC.\n");
|
||||
printf("\n");
|
||||
printf(" 5555555555555555555555555\n");
|
||||
printf(" 5555 5555\n");
|
||||
printf(" 5555 5555\n");
|
||||
printf(" 5555 5555\n");
|
||||
printf(" 5555 5555555555555555555555\n");
|
||||
printf(" 5555 555555555555555555555555\n");
|
||||
printf(" 5555 5555\n");
|
||||
printf(" 5555 5555\n");
|
||||
printf(" 5555 5555\n");
|
||||
printf(" 5555555555555555555555555555 55555\n");
|
||||
printf(" 55555 555555555 55555\n");
|
||||
printf(" 55555 55555 55555\n");
|
||||
printf(" 55555 5 55555\n");
|
||||
printf(" 55555 55555\n");
|
||||
printf(" 55555 55555\n");
|
||||
printf(" 55555 55555\n");
|
||||
printf(" 55555 55555\n");
|
||||
printf(" 55555 55555\n");
|
||||
printf(" 555555555\n");
|
||||
printf(" 55555\n");
|
||||
printf(" 5\n");
|
||||
printf("\n");
|
||||
|
||||
printf("\n");
|
||||
printf(" Welcome to SiFive!\n");
|
||||
|
||||
}
|
||||
|
||||
void timer_isr (int id, void *data) {
|
||||
|
||||
// Disable Timer interrupt
|
||||
metal_interrupt_disable(tmr_intr, tmr_id);
|
||||
|
||||
// Flag showing we hit timer isr
|
||||
timer_isr_flag = 1;
|
||||
}
|
||||
|
||||
void wait_for_timer(struct metal_led *which_led) {
|
||||
|
||||
// clear global timer isr flag
|
||||
timer_isr_flag = 0;
|
||||
|
||||
// Turn on desired LED
|
||||
metal_led_on(which_led);
|
||||
|
||||
// Set timer
|
||||
metal_cpu_set_mtimecmp(cpu0, metal_cpu_get_mtime(cpu0) + RTC_FREQ);
|
||||
|
||||
// Enable Timer interrupt
|
||||
metal_interrupt_enable(tmr_intr, tmr_id);
|
||||
|
||||
// wait till timer triggers and isr is hit
|
||||
while (timer_isr_flag == 0){};
|
||||
|
||||
timer_isr_flag = 0;
|
||||
|
||||
// Turn off this LED
|
||||
metal_led_off(which_led);
|
||||
}
|
||||
|
||||
int original_main (void)
|
||||
{
|
||||
int rc, up_cnt, dn_cnt;
|
||||
struct metal_led *led0_red, *led0_green, *led0_blue;
|
||||
|
||||
// This demo will toggle LEDs colors so we define them here
|
||||
led0_red = metal_led_get_rgb("LD0", "red");
|
||||
led0_green = metal_led_get_rgb("LD0", "green");
|
||||
led0_blue = metal_led_get_rgb("LD0", "blue");
|
||||
if ((led0_red == NULL) || (led0_green == NULL) || (led0_blue == NULL)) {
|
||||
printf("At least one of LEDs is null.\n");
|
||||
return 1;
|
||||
}
|
||||
|
||||
// Enable each LED
|
||||
metal_led_enable(led0_red);
|
||||
metal_led_enable(led0_green);
|
||||
metal_led_enable(led0_blue);
|
||||
|
||||
// All Off
|
||||
metal_led_off(led0_red);
|
||||
metal_led_off(led0_green);
|
||||
metal_led_off(led0_blue);
|
||||
|
||||
// Lets get the CPU and and its interrupt
|
||||
cpu0 = metal_cpu_get(0);
|
||||
if (cpu0 == NULL) {
|
||||
printf("CPU null.\n");
|
||||
return 2;
|
||||
}
|
||||
cpu_intr = metal_cpu_interrupt_controller(cpu0);
|
||||
if (cpu_intr == NULL) {
|
||||
printf("CPU interrupt controller is null.\n");
|
||||
return 3;
|
||||
}
|
||||
metal_interrupt_init(cpu_intr);
|
||||
|
||||
// display welcome banner
|
||||
display_banner();
|
||||
|
||||
// Setup Timer and its interrupt so we can toggle LEDs on 1s cadence
|
||||
tmr_intr = metal_cpu_timer_interrupt_controller(cpu0);
|
||||
if (tmr_intr == NULL) {
|
||||
printf("TIMER interrupt controller is null.\n");
|
||||
return 4;
|
||||
}
|
||||
metal_interrupt_init(tmr_intr);
|
||||
tmr_id = metal_cpu_timer_get_interrupt_id(cpu0);
|
||||
rc = metal_interrupt_register_handler(tmr_intr, tmr_id, timer_isr, cpu0);
|
||||
if (rc < 0) {
|
||||
printf("TIMER interrupt handler registration failed\n");
|
||||
return (rc * -1);
|
||||
}
|
||||
|
||||
// Lastly CPU interrupt
|
||||
if (metal_interrupt_enable(cpu_intr, 0) == -1) {
|
||||
printf("CPU interrupt enable failed\n");
|
||||
return 6;
|
||||
}
|
||||
|
||||
// Red -> Green -> Blue, repeat
|
||||
while (1) {
|
||||
|
||||
// Turn on RED
|
||||
wait_for_timer(led0_red);
|
||||
|
||||
// Turn on Green
|
||||
wait_for_timer(led0_green);
|
||||
|
||||
// Turn on Blue
|
||||
wait_for_timer(led0_blue);
|
||||
}
|
||||
|
||||
// return
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue