2 FreeRTOS.org V5.1.1 - 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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27 ***************************************************************************
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29 * SAVE TIME AND MONEY! We can port FreeRTOS.org to your own hardware, *
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30 * and even write all or part of your application on your behalf. *
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31 * See http://www.OpenRTOS.com for details of the services we provide to *
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32 * expedite your project. *
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34 ***************************************************************************
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35 ***************************************************************************
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37 Please ensure to read the configuration and relevant port sections of the
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38 online documentation.
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40 http://www.FreeRTOS.org - Documentation, latest information, license and
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43 http://www.SafeRTOS.com - A version that is certified for use in safety
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46 http://www.OpenRTOS.com - Commercial support, development, porting,
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47 licensing and training services.
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50 /*-----------------------------------------------------------
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51 * Components that can be compiled to either ARM or THUMB mode are
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52 * contained in serial.c The ISR routines, which can only be compiled
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53 * to ARM mode, are contained in this file.
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54 *----------------------------------------------------------*/
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58 /* Library includes. */
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59 #include "75x_uart.h"
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61 /* Scheduler includes. */
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62 #include "FreeRTOS.h"
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65 static xQueueHandle xRxedChars;
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66 static xQueueHandle xCharsForTx;
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67 static portBASE_TYPE volatile *pxQueueEmpty;
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69 void vConfigureQueues( xQueueHandle xQForRx, xQueueHandle xQForTx, portBASE_TYPE volatile *pxEmptyFlag )
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71 xRxedChars = xQForRx;
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72 xCharsForTx = xQForTx;
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73 pxQueueEmpty = pxEmptyFlag;
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75 /*-----------------------------------------------------------*/
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77 void vSerialISR( void )
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79 signed portCHAR cChar;
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80 portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
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84 if( UART0->MIS & UART_IT_Transmit )
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86 /* The interrupt was caused by the THR becoming empty. Are there any
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87 more characters to transmit? */
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88 if( xQueueReceiveFromISR( xCharsForTx, &cChar, &xHigherPriorityTaskWoken ) == pdTRUE )
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90 /* A character was retrieved from the queue so can be sent to the
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96 *pxQueueEmpty = pdTRUE;
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99 UART_ClearITPendingBit( UART0, UART_IT_Transmit );
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102 if( UART0->MIS & UART_IT_Receive )
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104 /* The interrupt was caused by a character being received. Grab the
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105 character from the RHR and place it in the queue of received
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108 xQueueSendFromISR( xRxedChars, &cChar, &xHigherPriorityTaskWoken );
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109 UART_ClearITPendingBit( UART0, UART_IT_Receive );
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111 } while( UART0->MIS );
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113 /* If a task was woken by either a character being received or a character
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114 being transmitted then we may need to switch to another task. */
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115 portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );
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