/* | |
FreeRTOS V5.4.2 - Copyright (C) 2009 Real Time Engineers Ltd. | |
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 exception 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. | |
Alternative commercial license and support terms are also available upon | |
request. See the licensing section of http://www.FreeRTOS.org for full | |
license details. | |
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 along | |
with FreeRTOS; if not, write to the Free Software Foundation, Inc., 59 | |
Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
*************************************************************************** | |
* * | |
* Looking for a quick start? Then check out the FreeRTOS eBook! * | |
* See http://www.FreeRTOS.org/Documentation for details * | |
* * | |
*************************************************************************** | |
1 tab == 4 spaces! | |
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. | |
*/ | |
/* | |
Changes from V3.0.0 | |
+ ISRcode pulled inline to reduce stack-usage. | |
+ Added functionality to only call vTaskSwitchContext() once | |
when handling multiple interruptsources in a single interruptcall. | |
+ Filename changed to a .c extension to allow stepping through code | |
using F7. | |
Changes from V3.0.1 | |
*/ | |
#ifndef _FREERTOS_SERIAL_ISRSERIALTX_C | |
#define _FREERTOS_SERIAL_ISRSERIALTX_C | |
#define serINTERRUPT_DISABLED ( 0 ) | |
{ | |
/* | |
* Was the interrupt the Tx register becoming empty? | |
*/ | |
if( bTXIF && bTXIE) | |
{ | |
/* | |
* Queue to interface between comms API and interrupt routine. | |
*/ | |
extern xQueueHandle xCharsForTx; | |
/* | |
* Because we are not allowed to use local variables here, | |
* PRODL and PRODH are (ab)used as temporary storage. This | |
* is allowed because these SFR's will be restored before | |
* exiting the ISR. | |
*/ | |
extern portCHAR cChar; | |
#pragma locate cChar &PRODL | |
extern portBASE_TYPE pxTaskWoken; | |
#pragma locate pxTaskWoken &PRODH | |
if( xQueueReceiveFromISR( xCharsForTx, &cChar, &pxTaskWoken ) == pdTRUE ) | |
{ | |
/* | |
* Send the next character queued for Tx. | |
*/ | |
TXREG = cChar; | |
} | |
else | |
{ | |
/* | |
* Queue empty, nothing to send. | |
*/ | |
bTXIE = serINTERRUPT_DISABLED; | |
} | |
/* | |
* If we woke another task, ask for a contextswitch | |
*/ | |
if( pxTaskWoken == pdTRUE ) | |
{ | |
uxSwitchRequested = pdTRUE; | |
} | |
} | |
} | |
#endif /* _FREERTOS_SERIAL_ISRSERIALTX_C */ |