111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
/*
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FreeRTOS.org V4.7.0 - Copyright (C) 2003-2007 Richard Barry.
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This file is part of the FreeRTOS.org distribution.
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FreeRTOS.org is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FreeRTOS.org is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FreeRTOS.org; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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A special exception to the GPL can be applied should you wish to distribute
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a combined work that includes FreeRTOS.org, without being obliged to provide
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the source code for any proprietary components. See the licensing section
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of http://www.FreeRTOS.org for full details of how and when the exception
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can be applied.
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***************************************************************************
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See http://www.FreeRTOS.org for documentation, latest information, license
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and contact details. Please ensure to read the configuration and relevant
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port sections of the online documentation.
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Also see http://www.SafeRTOS.com a version that has been certified for use
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in safety critical systems, plus commercial licensing, development and
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support options.
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***************************************************************************
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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 portCHAR cChar;
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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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if( xQueueSendFromISR( xRxedChars, ( const void * ) &cChar, pdFALSE ) )
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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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