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121 lines
4.3 KiB
C
121 lines
4.3 KiB
C
/*
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FreeRTOS V7.0.2 - Copyright (C) 2011 Real Time Engineers Ltd.
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***************************************************************************
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* *
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* FreeRTOS tutorial books are available in pdf and paperback. *
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* Complete, revised, and edited pdf reference manuals are also *
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* available. *
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* *
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* Purchasing FreeRTOS documentation will not only help you, by *
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* ensuring you get running as quickly as possible and with an *
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* in-depth knowledge of how to use FreeRTOS, it will also help *
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* the FreeRTOS project to continue with its mission of providing *
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* professional grade, cross platform, de facto standard solutions *
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* for microcontrollers - completely free of charge! *
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* *
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* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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* *
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* Thank you for using FreeRTOS, and 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 modification to the GPL is included to allow you to
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distribute a combined work that includes FreeRTOS without being obliged to
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provide the source code for proprietary components outside of the FreeRTOS
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kernel. FreeRTOS is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or 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_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 char 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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