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jeremybenn |
/*
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FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd.
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***************************************************************************
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* *
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* If you are: *
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* *
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* + New to FreeRTOS, *
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* + Wanting to learn FreeRTOS or multitasking in general quickly *
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* + Looking for basic training, *
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* + Wanting to improve your FreeRTOS skills and productivity *
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* *
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* then take a look at the FreeRTOS books - available as PDF or paperback *
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* *
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* "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
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* http://www.FreeRTOS.org/Documentation *
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* *
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* A pdf reference manual is also available. Both are usually delivered *
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* to your inbox within 20 minutes to two hours when purchased between 8am *
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* and 8pm GMT (although please allow up to 24 hours in case of *
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* exceptional circumstances). Thank you for your support! *
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* *
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***************************************************************************
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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***NOTE*** The exception to the GPL is included to allow you to distribute
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a combined work that includes FreeRTOS without being obliged to provide the
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source code for proprietary components outside of the FreeRTOS kernel.
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FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details. You should have received a copy of the GNU General Public
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License and the FreeRTOS license exception along with FreeRTOS; if not it
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can be viewed here: http://www.freertos.org/a00114.html and also obtained
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by writing to Richard Barry, contact details for whom are available on the
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FreeRTOS WEB site.
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1 tab == 4 spaces!
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http://www.FreeRTOS.org - Documentation, latest information, license and
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contact details.
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http://www.SafeRTOS.com - A version that is certified for use in safety
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critical systems.
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http://www.OpenRTOS.com - Commercial support, development, porting,
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licensing and training services.
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*/
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/*
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Changes from V3.0.0
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+ ISRcode pulled inline to reduce stack-usage.
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+ Added functionality to only call vTaskSwitchContext() once
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when handling multiple interruptsources in a single interruptcall.
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+ Filename changed to a .c extension to allow stepping through code
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using F7.
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Changes from V3.0.1
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*/
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#ifndef _FREERTOS_SERIAL_ISRSERIALRX_C
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#define _FREERTOS_SERIAL_ISRSERIALRX_C
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#define serCONTINUOUS_RX ( 1 )
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#define serCLEAR_OVERRUN ( 0 )
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{
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/*
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* Was the interrupt a byte being received?
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*/
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if( bRCIF && bRCIE)
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{
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/*
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* Queue to interface between comms API and interrupt routine.
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*/
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extern xQueueHandle xRxedChars;
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/*
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* Because we are not allowed to use local variables here,
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* PRODL is (ab)used as temporary storage. This is allowed
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* because this SFR will be restored before exiting the ISR.
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*/
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extern char cChar;
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extern portBASE_TYPE xHigherPriorityTaskWoken;
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#pragma locate cChar &PRODL
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/*
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* If there was a framing error, just get and ignore
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* the character
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*/
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if( bFERR )
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{
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cChar = RCREG;
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}
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else
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{
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/*
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* Get the character and post it on the queue of Rxed
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* characters. If the post causes a task to wake ask
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* for a context switch as the woken task may have a
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* higher priority than the task we have interrupted.
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*/
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cChar = RCREG;
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/*
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* Clear any overrun errors.
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*/
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if( bOERR )
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{
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bCREN = serCLEAR_OVERRUN;
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bCREN = serCONTINUOUS_RX;
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}
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xHigherPriorityTaskWoken = pdFALSE;
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xQueueSendFromISR( xRxedChars, ( const void * ) &cChar, &xHigherPriorityTaskWoken );
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if( xHigherPriorityTaskWoken )
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{
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uxSwitchRequested = pdTRUE;
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}
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}
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}
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}
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#endif /* _FREERTOS_SERIAL_ISRSERIALRX_C */
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