/* | |
FreeRTOS.org V5.0.4 - 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, | |
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*/ | |
/* | |
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 */ |