/* | |
FreeRTOS.org V5.1.0 - Copyright (C) 2003-2008 Richard Barry. | |
This file is part of the FreeRTOS.org distribution. | |
FreeRTOS.org is free software; you can redistribute it and/or modify | |
it under the terms of the GNU General Public License as published by | |
the Free Software Foundation; either version 2 of the License, or | |
(at your option) any later version. | |
FreeRTOS.org 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 | |
along with FreeRTOS.org; if not, write to the Free Software | |
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
A special exception to the GPL can be applied should you wish to distribute | |
a combined work that includes FreeRTOS.org, without being obliged to provide | |
the source code for any proprietary components. See the licensing section | |
of http://www.FreeRTOS.org for full details of how and when the exception | |
can be applied. | |
*************************************************************************** | |
*************************************************************************** | |
* * | |
* SAVE TIME AND MONEY! We can port FreeRTOS.org to your own hardware, * | |
* and even write all or part of your application on your behalf. * | |
* See http://www.OpenRTOS.com for details of the services we provide to * | |
* expedite your project. * | |
* * | |
*************************************************************************** | |
*************************************************************************** | |
Please ensure to read the configuration and relevant port sections of the | |
online documentation. | |
http://www.FreeRTOS.org - Documentation, latest information, license and | |
contact details. | |
http://www.SafeRTOS.com - A version that is certified for use in safety | |
critical systems. | |
http://www.OpenRTOS.com - Commercial support, development, porting, | |
licensing and training services. | |
*/ | |
/*----------------------------------------------------------- | |
* 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 portCHAR 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 ); | |
} | |