You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
144 lines
6.1 KiB
C
144 lines
6.1 KiB
C
/*
|
|
FreeRTOS V7.4.2 - Copyright (C) 2013 Real Time Engineers Ltd.
|
|
|
|
FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME. PLEASE VISIT
|
|
http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
|
|
|
|
***************************************************************************
|
|
* *
|
|
* FreeRTOS tutorial books are available in pdf and paperback. *
|
|
* Complete, revised, and edited pdf reference manuals are also *
|
|
* available. *
|
|
* *
|
|
* Purchasing FreeRTOS documentation will not only help you, by *
|
|
* ensuring you get running as quickly as possible and with an *
|
|
* in-depth knowledge of how to use FreeRTOS, it will also help *
|
|
* the FreeRTOS project to continue with its mission of providing *
|
|
* professional grade, cross platform, de facto standard solutions *
|
|
* for microcontrollers - completely free of charge! *
|
|
* *
|
|
* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
|
|
* *
|
|
* Thank you for using FreeRTOS, and thank you for your support! *
|
|
* *
|
|
***************************************************************************
|
|
|
|
|
|
This file is part of the FreeRTOS distribution.
|
|
|
|
FreeRTOS is free software; you can redistribute it and/or modify it under
|
|
the terms of the GNU General Public License (version 2) as published by the
|
|
Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
|
|
|
|
>>>>>>NOTE<<<<<< The modification to the GPL is included to allow you to
|
|
distribute a combined work that includes FreeRTOS without being obliged to
|
|
provide the source code for proprietary components outside of the FreeRTOS
|
|
kernel.
|
|
|
|
FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
|
|
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
|
|
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
|
|
details. You should have received a copy of the GNU General Public License
|
|
and the FreeRTOS license exception along with FreeRTOS; if not it can be
|
|
viewed here: http://www.freertos.org/a00114.html and also obtained by
|
|
writing to Real Time Engineers Ltd., contact details for whom are available
|
|
on the FreeRTOS WEB site.
|
|
|
|
1 tab == 4 spaces!
|
|
|
|
***************************************************************************
|
|
* *
|
|
* Having a problem? Start by reading the FAQ "My application does *
|
|
* not run, what could be wrong?" *
|
|
* *
|
|
* http://www.FreeRTOS.org/FAQHelp.html *
|
|
* *
|
|
***************************************************************************
|
|
|
|
|
|
http://www.FreeRTOS.org - Documentation, books, training, latest versions,
|
|
license and Real Time Engineers Ltd. contact details.
|
|
|
|
http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
|
|
including FreeRTOS+Trace - an indispensable productivity tool, and our new
|
|
fully thread aware and reentrant UDP/IP stack.
|
|
|
|
http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
|
|
Integrity Systems, who sell the code with commercial support,
|
|
indemnification and middleware, under the OpenRTOS brand.
|
|
|
|
http://www.SafeRTOS.com - High Integrity Systems also provide a safety
|
|
engineered and independently SIL3 certified version for use in safety and
|
|
mission critical applications that require provable dependability.
|
|
*/
|
|
|
|
/*-----------------------------------------------------------
|
|
* Components that can be compiled to either ARM or THUMB mode are
|
|
* contained in serial.c The ISR routines, which can only be compiled
|
|
* to ARM mode, are contained in this file.
|
|
*----------------------------------------------------------*/
|
|
|
|
|
|
|
|
/* Library includes. */
|
|
#include "75x_uart.h"
|
|
|
|
/* Scheduler includes. */
|
|
#include "FreeRTOS.h"
|
|
#include "queue.h"
|
|
|
|
static xQueueHandle xRxedChars;
|
|
static xQueueHandle xCharsForTx;
|
|
static portBASE_TYPE volatile *pxQueueEmpty;
|
|
|
|
void vConfigureQueues( xQueueHandle xQForRx, xQueueHandle xQForTx, portBASE_TYPE volatile *pxEmptyFlag )
|
|
{
|
|
xRxedChars = xQForRx;
|
|
xCharsForTx = xQForTx;
|
|
pxQueueEmpty = pxEmptyFlag;
|
|
}
|
|
/*-----------------------------------------------------------*/
|
|
|
|
void vSerialISR( void )
|
|
{
|
|
signed char cChar;
|
|
portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
|
|
|
|
do
|
|
{
|
|
if( UART0->MIS & UART_IT_Transmit )
|
|
{
|
|
/* The interrupt was caused by the THR becoming empty. Are there any
|
|
more characters to transmit? */
|
|
if( xQueueReceiveFromISR( xCharsForTx, &cChar, &xHigherPriorityTaskWoken ) == pdTRUE )
|
|
{
|
|
/* A character was retrieved from the queue so can be sent to the
|
|
THR now. */
|
|
UART0->DR = cChar;
|
|
}
|
|
else
|
|
{
|
|
*pxQueueEmpty = pdTRUE;
|
|
}
|
|
|
|
UART_ClearITPendingBit( UART0, UART_IT_Transmit );
|
|
}
|
|
|
|
if( UART0->MIS & UART_IT_Receive )
|
|
{
|
|
/* The interrupt was caused by a character being received. Grab the
|
|
character from the RHR and place it in the queue of received
|
|
characters. */
|
|
cChar = UART0->DR;
|
|
xQueueSendFromISR( xRxedChars, &cChar, &xHigherPriorityTaskWoken );
|
|
UART_ClearITPendingBit( UART0, UART_IT_Receive );
|
|
}
|
|
} while( UART0->MIS );
|
|
|
|
/* If a task was woken by either a character being received or a character
|
|
being transmitted then we may need to switch to another task. */
|
|
portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );
|
|
}
|
|
|
|
|