2 FreeRTOS.org V4.7.1 - Copyright (C) 2003-2008 Richard Barry.
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4 This file is part of the FreeRTOS.org distribution.
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6 FreeRTOS.org 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.org 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.org; 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.org, 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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28 Please ensure to read the configuration and relevant port sections of the
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29 online documentation.
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31 +++ http://www.FreeRTOS.org +++
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32 Documentation, latest information, license and contact details.
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34 +++ http://www.SafeRTOS.com +++
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35 A version that is certified for use in safety critical systems.
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37 +++ http://www.OpenRTOS.com +++
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38 Commercial support, development, porting, licensing and training services.
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40 ***************************************************************************
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43 /*-----------------------------------------------------------
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44 * Components that can be compiled to either ARM or THUMB mode are
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45 * contained in serial.c The ISR routines, which can only be compiled
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46 * to ARM mode, are contained in this file.
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47 *----------------------------------------------------------*/
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51 /* Library includes. */
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52 #include "75x_uart.h"
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54 /* Scheduler includes. */
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55 #include "FreeRTOS.h"
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58 static xQueueHandle xRxedChars;
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59 static xQueueHandle xCharsForTx;
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60 static portBASE_TYPE volatile *pxQueueEmpty;
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62 void vConfigureQueues( xQueueHandle xQForRx, xQueueHandle xQForTx, portBASE_TYPE volatile *pxEmptyFlag )
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64 xRxedChars = xQForRx;
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65 xCharsForTx = xQForTx;
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66 pxQueueEmpty = pxEmptyFlag;
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68 /*-----------------------------------------------------------*/
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70 void vSerialISR( void )
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72 signed portCHAR cChar;
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73 portBASE_TYPE xTaskWokenByTx = pdFALSE, xTaskWokenByPost = pdFALSE;
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77 if( UART0->MIS & UART_IT_Transmit )
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79 /* The interrupt was caused by the THR becoming empty. Are there any
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80 more characters to transmit? */
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81 if( xQueueReceiveFromISR( xCharsForTx, &cChar, &xTaskWokenByTx ) == pdTRUE )
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83 /* A character was retrieved from the queue so can be sent to the
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89 *pxQueueEmpty = pdTRUE;
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92 UART_ClearITPendingBit( UART0, UART_IT_Transmit );
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95 if( UART0->MIS & UART_IT_Receive )
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97 /* The interrupt was caused by a character being received. Grab the
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98 character from the RHR and place it in the queue of received
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101 xTaskWokenByPost = xQueueSendFromISR( xRxedChars, &cChar, xTaskWokenByPost );
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102 UART_ClearITPendingBit( UART0, UART_IT_Receive );
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104 } while( UART0->MIS );
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106 /* If a task was woken by either a character being received or a character
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107 being transmitted then we may need to switch to another task. */
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108 portEND_SWITCHING_ISR( ( xTaskWokenByPost || xTaskWokenByTx ) );
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