/* | |
FreeRTOS V7.0.0 - Copyright (C) 2011 Real Time Engineers Ltd. | |
*************************************************************************** | |
* * | |
* 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 Richard Barry, contact details for whom are available on the | |
FreeRTOS WEB site. | |
1 tab == 4 spaces! | |
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 char 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 */ |