2 FreeRTOS V4.0.1 - Copyright (C) 2003-2006 Richard Barry.
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4 This file is part of the FreeRTOS distribution.
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6 FreeRTOS is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2 of the License, or
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9 (at your option) any later version.
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11 FreeRTOS is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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16 You should have received a copy of the GNU General Public License
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17 along with FreeRTOS; if not, write to the Free Software
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18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 A special exception to the GPL can be applied should you wish to distribute
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21 a combined work that includes FreeRTOS, without being obliged to provide
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22 the source code for any proprietary components. See the licensing section
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23 of http://www.FreeRTOS.org for full details of how and when the exception
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26 ***************************************************************************
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27 See http://www.FreeRTOS.org for documentation, latest information, license
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28 and contact details. Please ensure to read the configuration and relevant
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29 port sections of the online documentation.
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30 ***************************************************************************
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35 + ISRcode pulled inline to reduce stack-usage.
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37 + Added functionality to only call vTaskSwitchContext() once
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38 when handling multiple interruptsources in a single interruptcall.
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40 + Filename changed to a .c extension to allow stepping through code
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46 #ifndef _FREERTOS_SERIAL_ISRSERIALRX_C
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47 #define _FREERTOS_SERIAL_ISRSERIALRX_C
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49 #define serCONTINUOUS_RX ( 1 )
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50 #define serCLEAR_OVERRUN ( 0 )
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54 * Was the interrupt a byte being received?
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59 * Queue to interface between comms API and interrupt routine.
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61 extern xQueueHandle xRxedChars;
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64 * Because we are not allowed to use local variables here,
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65 * PRODL is (ab)used as temporary storage. This is allowed
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66 * because this SFR will be restored before exiting the ISR.
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68 extern portCHAR cChar;
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69 #pragma locate cChar &PRODL
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72 * If there was a framing error, just get and ignore
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82 * Get the character and post it on the queue of Rxed
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83 * characters. If the post causes a task to wake ask
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84 * for a context switch as the woken task may have a
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85 * higher priority than the task we have interrupted.
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90 * Clear any overrun errors.
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94 bCREN = serCLEAR_OVERRUN;
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95 bCREN = serCONTINUOUS_RX;
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98 if( xQueueSendFromISR( xRxedChars, ( const void * ) &cChar, pdFALSE ) )
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100 uxSwitchRequested = pdTRUE;
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106 #endif /* _FREERTOS_SERIAL_ISRSERIALRX_C */
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