110 lines
3.2 KiB
C
110 lines
3.2 KiB
C
/*
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FreeRTOS.org V4.7.1 - Copyright (C) 2003-2008 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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Please ensure to read the configuration and relevant port sections of the
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online documentation.
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+++ http://www.FreeRTOS.org +++
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Documentation, latest information, license and contact details.
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+++ http://www.SafeRTOS.com +++
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A version that is certified for use in safety critical systems.
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+++ http://www.OpenRTOS.com +++
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Commercial support, development, porting, licensing and training services.
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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_ISRSERIALTX_C
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#define _FREERTOS_SERIAL_ISRSERIALTX_C
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#define serINTERRUPT_DISABLED ( 0 )
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{
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/*
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* Was the interrupt the Tx register becoming empty?
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*/
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if( bTXIF && bTXIE)
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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 xCharsForTx;
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/*
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* Because we are not allowed to use local variables here,
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* PRODL and PRODH are (ab)used as temporary storage. This
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* is allowed because these SFR's will be restored before
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* 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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extern portBASE_TYPE pxTaskWoken;
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#pragma locate pxTaskWoken &PRODH
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if( xQueueReceiveFromISR( xCharsForTx, &cChar, &pxTaskWoken ) == pdTRUE )
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{
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/*
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* Send the next character queued for Tx.
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*/
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TXREG = cChar;
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}
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else
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{
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/*
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* Queue empty, nothing to send.
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*/
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bTXIE = serINTERRUPT_DISABLED;
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}
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/*
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* If we woke another task, ask for a contextswitch
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*/
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if( pxTaskWoken == pdTRUE )
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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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#endif /* _FREERTOS_SERIAL_ISRSERIALTX_C */
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