2 FreeRTOS V6.0.5 - Copyright (C) 2010 Real Time Engineers Ltd.
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4 ***************************************************************************
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8 * + New to FreeRTOS, *
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9 * + Wanting to learn FreeRTOS or multitasking in general quickly *
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10 * + Looking for basic training, *
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11 * + Wanting to improve your FreeRTOS skills and productivity *
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13 * then take a look at the FreeRTOS eBook *
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15 * "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
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16 * http://www.FreeRTOS.org/Documentation *
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18 * A pdf reference manual is also available. Both are usually delivered *
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19 * to your inbox within 20 minutes to two hours when purchased between 8am *
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20 * and 8pm GMT (although please allow up to 24 hours in case of *
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21 * exceptional circumstances). Thank you for your support! *
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23 ***************************************************************************
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25 This file is part of the FreeRTOS distribution.
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27 FreeRTOS is free software; you can redistribute it and/or modify it under
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28 the terms of the GNU General Public License (version 2) as published by the
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29 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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30 ***NOTE*** The exception to the GPL is included to allow you to distribute
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31 a combined work that includes FreeRTOS without being obliged to provide the
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32 source code for proprietary components outside of the FreeRTOS kernel.
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33 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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34 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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35 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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36 more details. You should have received a copy of the GNU General Public
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37 License and the FreeRTOS license exception along with FreeRTOS; if not it
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38 can be viewed here: http://www.freertos.org/a00114.html and also obtained
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39 by writing to Richard Barry, contact details for whom are available on the
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44 http://www.FreeRTOS.org - Documentation, latest information, license and
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47 http://www.SafeRTOS.com - A version that is certified for use in safety
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50 http://www.OpenRTOS.com - Commercial support, development, porting,
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51 licensing and training services.
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56 + ISRcode pulled inline to reduce stack-usage.
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58 + Added functionality to only call vTaskSwitchContext() once
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59 when handling multiple interruptsources in a single interruptcall.
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61 + Filename changed to a .c extension to allow stepping through code
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67 #ifndef _FREERTOS_SERIAL_ISRSERIALRX_C
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68 #define _FREERTOS_SERIAL_ISRSERIALRX_C
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70 #define serCONTINUOUS_RX ( 1 )
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71 #define serCLEAR_OVERRUN ( 0 )
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75 * Was the interrupt a byte being received?
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80 * Queue to interface between comms API and interrupt routine.
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82 extern xQueueHandle xRxedChars;
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85 * Because we are not allowed to use local variables here,
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86 * PRODL is (ab)used as temporary storage. This is allowed
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87 * because this SFR will be restored before exiting the ISR.
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90 extern portBASE_TYPE xHigherPriorityTaskWoken;
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91 #pragma locate cChar &PRODL
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94 * If there was a framing error, just get and ignore
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104 * Get the character and post it on the queue of Rxed
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105 * characters. If the post causes a task to wake ask
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106 * for a context switch as the woken task may have a
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107 * higher priority than the task we have interrupted.
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112 * Clear any overrun errors.
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116 bCREN = serCLEAR_OVERRUN;
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117 bCREN = serCONTINUOUS_RX;
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120 xHigherPriorityTaskWoken = pdFALSE;
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121 xQueueSendFromISR( xRxedChars, ( const void * ) &cChar, &xHigherPriorityTaskWoken );
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123 if( xHigherPriorityTaskWoken )
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125 uxSwitchRequested = pdTRUE;
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131 #endif /* _FREERTOS_SERIAL_ISRSERIALRX_C */
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