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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [PIC18_WizC/] [serial/] [isrSerialTx.c] - Rev 613
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/* FreeRTOS V6.1.1 - Copyright (C) 2011 Real Time Engineers Ltd. *************************************************************************** * * * If you are: * * * * + New to FreeRTOS, * * + Wanting to learn FreeRTOS or multitasking in general quickly * * + Looking for basic training, * * + Wanting to improve your FreeRTOS skills and productivity * * * * then take a look at the FreeRTOS books - available as PDF or paperback * * * * "Using the FreeRTOS Real Time Kernel - a Practical Guide" * * http://www.FreeRTOS.org/Documentation * * * * A pdf reference manual is also available. Both are usually delivered * * to your inbox within 20 minutes to two hours when purchased between 8am * * and 8pm GMT (although please allow up to 24 hours in case of * * exceptional circumstances). Thank you for your support! * * * *************************************************************************** This file is part of the FreeRTOS distribution. FreeRTOS is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License (version 2) as published by the Free Software Foundation AND MODIFIED BY the FreeRTOS exception. ***NOTE*** The exception to the GPL is included to allow you to distribute a combined work that includes FreeRTOS without being obliged to provide the source code for proprietary components outside of the FreeRTOS kernel. FreeRTOS 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 and the FreeRTOS license exception along with FreeRTOS; if not it can be viewed here: http://www.freertos.org/a00114.html and also obtained by writing to Richard Barry, contact details for whom are available on the FreeRTOS WEB site. 1 tab == 4 spaces! 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, licensing and training services. */ /* 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 char 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 */
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