2 FreeRTOS.org V4.1.2 - Copyright (C) 2003-2006 Richard Barry.
\r
4 This file is part of the FreeRTOS.org distribution.
\r
6 FreeRTOS.org is free software; you can redistribute it and/or modify
\r
7 it under the terms of the GNU General Public License as published by
\r
8 the Free Software Foundation; either version 2 of the License, or
\r
9 (at your option) any later version.
\r
11 FreeRTOS.org is distributed in the hope that it will be useful,
\r
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
\r
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
\r
14 GNU General Public License for more details.
\r
16 You should have received a copy of the GNU General Public License
\r
17 along with FreeRTOS.org; if not, write to the Free Software
\r
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
\r
20 A special exception to the GPL can be applied should you wish to distribute
\r
21 a combined work that includes FreeRTOS.org, without being obliged to provide
\r
22 the source code for any proprietary components. See the licensing section
\r
23 of http://www.FreeRTOS.org for full details of how and when the exception
\r
26 ***************************************************************************
\r
27 See http://www.FreeRTOS.org for documentation, latest information, license
\r
28 and contact details. Please ensure to read the configuration and relevant
\r
29 port sections of the online documentation.
\r
30 ***************************************************************************
\r
33 /*-----------------------------------------------------------
\r
34 * Components that can be compiled to either ARM or THUMB mode are
\r
35 * contained in serial.c The ISR routines, which can only be compiled
\r
36 * to ARM mode, are contained in this file.
\r
37 *----------------------------------------------------------*/
\r
41 /* Library includes. */
\r
42 #include "75x_uart.h"
\r
44 /* Scheduler includes. */
\r
45 #include "FreeRTOS.h"
\r
48 static xQueueHandle xRxedChars;
\r
49 static xQueueHandle xCharsForTx;
\r
50 static portBASE_TYPE volatile *pxQueueEmpty;
\r
52 void vConfigureQueues( xQueueHandle xQForRx, xQueueHandle xQForTx, portBASE_TYPE volatile *pxEmptyFlag )
\r
54 xRxedChars = xQForRx;
\r
55 xCharsForTx = xQForTx;
\r
56 pxQueueEmpty = pxEmptyFlag;
\r
58 /*-----------------------------------------------------------*/
\r
60 void vSerialISR( void )
\r
62 signed portCHAR cChar;
\r
63 portBASE_TYPE xTaskWokenByTx = pdFALSE, xTaskWokenByPost = pdFALSE;
\r
67 if( UART0->MIS & UART_IT_Transmit )
\r
69 /* The interrupt was caused by the THR becoming empty. Are there any
\r
70 more characters to transmit? */
\r
71 if( xQueueReceiveFromISR( xCharsForTx, &cChar, &xTaskWokenByTx ) == pdTRUE )
\r
73 /* A character was retrieved from the queue so can be sent to the
\r
79 *pxQueueEmpty = pdTRUE;
\r
82 UART_ClearITPendingBit( UART0, UART_IT_Transmit );
\r
85 if( UART0->MIS & UART_IT_Receive )
\r
87 /* The interrupt was caused by a character being received. Grab the
\r
88 character from the RHR and place it in the queue of received
\r
91 xTaskWokenByPost = xQueueSendFromISR( xRxedChars, &cChar, xTaskWokenByPost );
\r
92 UART_ClearITPendingBit( UART0, UART_IT_Receive );
\r
94 } while( UART0->MIS );
\r
96 /* If a task was woken by either a character being received or a character
\r
97 being transmitted then we may need to switch to another task. */
\r
98 portEND_SWITCHING_ISR( ( xTaskWokenByPost || xTaskWokenByTx ) );
\r