2 FreeRTOS V7.3.0 - Copyright (C) 2012 Real Time Engineers Ltd.
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4 FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME. PLEASE VISIT
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5 http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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7 ***************************************************************************
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9 * FreeRTOS tutorial books are available in pdf and paperback. *
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10 * Complete, revised, and edited pdf reference manuals are also *
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13 * Purchasing FreeRTOS documentation will not only help you, by *
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14 * ensuring you get running as quickly as possible and with an *
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15 * in-depth knowledge of how to use FreeRTOS, it will also help *
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16 * the FreeRTOS project to continue with its mission of providing *
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17 * professional grade, cross platform, de facto standard solutions *
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18 * for microcontrollers - completely free of charge! *
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20 * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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22 * Thank you for using FreeRTOS, and thank you for your support! *
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24 ***************************************************************************
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27 This file is part of the FreeRTOS distribution.
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29 FreeRTOS is free software; you can redistribute it and/or modify it under
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30 the terms of the GNU General Public License (version 2) as published by the
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31 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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32 >>>NOTE<<< The modification to the GPL is included to allow you to
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33 distribute a combined work that includes FreeRTOS without being obliged to
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34 provide the source code for proprietary components outside of the FreeRTOS
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35 kernel. FreeRTOS is distributed in the hope that it will be useful, but
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36 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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37 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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38 more details. You should have received a copy of the GNU General Public
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39 License and the FreeRTOS license exception along with FreeRTOS; if not it
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40 can be viewed here: http://www.freertos.org/a00114.html and also obtained
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41 by writing to Richard Barry, contact details for whom are available on the
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46 ***************************************************************************
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48 * Having a problem? Start by reading the FAQ "My application does *
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49 * not run, what could be wrong?" *
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51 * http://www.FreeRTOS.org/FAQHelp.html *
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53 ***************************************************************************
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56 http://www.FreeRTOS.org - Documentation, training, latest versions, license
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57 and contact details.
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59 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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60 including FreeRTOS+Trace - an indispensable productivity tool.
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62 Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
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63 the code with commercial support, indemnification, and middleware, under
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64 the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
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65 provide a safety engineered and independently SIL3 certified version under
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66 the SafeRTOS brand: http://www.SafeRTOS.com.
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71 + ISRcode pulled inline to reduce stack-usage.
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73 + Added functionality to only call vTaskSwitchContext() once
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74 when handling multiple interruptsources in a single interruptcall.
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76 + Filename changed to a .c extension to allow stepping through code
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82 #ifndef _FREERTOS_SERIAL_ISRSERIALRX_C
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83 #define _FREERTOS_SERIAL_ISRSERIALRX_C
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85 #define serCONTINUOUS_RX ( 1 )
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86 #define serCLEAR_OVERRUN ( 0 )
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90 * Was the interrupt a byte being received?
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95 * Queue to interface between comms API and interrupt routine.
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97 extern xQueueHandle xRxedChars;
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100 * Because we are not allowed to use local variables here,
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101 * PRODL is (ab)used as temporary storage. This is allowed
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102 * because this SFR will be restored before exiting the ISR.
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105 extern portBASE_TYPE xHigherPriorityTaskWoken;
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106 #pragma locate cChar &PRODL
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109 * If there was a framing error, just get and ignore
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119 * Get the character and post it on the queue of Rxed
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120 * characters. If the post causes a task to wake ask
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121 * for a context switch as the woken task may have a
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122 * higher priority than the task we have interrupted.
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127 * Clear any overrun errors.
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131 bCREN = serCLEAR_OVERRUN;
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132 bCREN = serCONTINUOUS_RX;
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135 xHigherPriorityTaskWoken = pdFALSE;
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136 xQueueSendFromISR( xRxedChars, ( const void * ) &cChar, &xHigherPriorityTaskWoken );
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138 if( xHigherPriorityTaskWoken )
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140 uxSwitchRequested = pdTRUE;
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146 #endif /* _FREERTOS_SERIAL_ISRSERIALRX_C */
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