2 FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
\r
5 ***************************************************************************
\r
7 * FreeRTOS tutorial books are available in pdf and paperback. *
\r
8 * Complete, revised, and edited pdf reference manuals are also *
\r
11 * Purchasing FreeRTOS documentation will not only help you, by *
\r
12 * ensuring you get running as quickly as possible and with an *
\r
13 * in-depth knowledge of how to use FreeRTOS, it will also help *
\r
14 * the FreeRTOS project to continue with its mission of providing *
\r
15 * professional grade, cross platform, de facto standard solutions *
\r
16 * for microcontrollers - completely free of charge! *
\r
18 * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
\r
20 * Thank you for using FreeRTOS, and thank you for your support! *
\r
22 ***************************************************************************
\r
25 This file is part of the FreeRTOS distribution.
\r
27 FreeRTOS is free software; you can redistribute it and/or modify it under
\r
28 the terms of the GNU General Public License (version 2) as published by the
\r
29 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
\r
30 >>>NOTE<<< The modification to the GPL is included to allow you to
\r
31 distribute a combined work that includes FreeRTOS without being obliged to
\r
32 provide the source code for proprietary components outside of the FreeRTOS
\r
33 kernel. FreeRTOS is distributed in the hope that it will be useful, but
\r
34 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
\r
35 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
\r
36 more details. You should have received a copy of the GNU General Public
\r
37 License and the FreeRTOS license exception along with FreeRTOS; if not it
\r
38 can be viewed here: http://www.freertos.org/a00114.html and also obtained
\r
39 by writing to Richard Barry, contact details for whom are available on the
\r
44 ***************************************************************************
\r
46 * Having a problem? Start by reading the FAQ "My application does *
\r
47 * not run, what could be wrong? *
\r
49 * http://www.FreeRTOS.org/FAQHelp.html *
\r
51 ***************************************************************************
\r
54 http://www.FreeRTOS.org - Documentation, training, latest information,
\r
55 license and contact details.
\r
57 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
\r
58 including FreeRTOS+Trace - an indispensable productivity tool.
\r
60 Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
\r
61 the code with commercial support, indemnification, and middleware, under
\r
62 the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
\r
63 provide a safety engineered and independently SIL3 certified version under
\r
64 the SafeRTOS brand: http://www.SafeRTOS.com.
\r
67 /*-----------------------------------------------------------
\r
68 * Components that can be compiled to either ARM or THUMB mode are
\r
69 * contained in serial.c The ISR routines, which can only be compiled
\r
70 * to ARM mode, are contained in this file.
\r
71 *----------------------------------------------------------*/
\r
75 /* Library includes. */
\r
76 #include "75x_uart.h"
\r
78 /* Scheduler includes. */
\r
79 #include "FreeRTOS.h"
\r
82 static xQueueHandle xRxedChars;
\r
83 static xQueueHandle xCharsForTx;
\r
84 static portBASE_TYPE volatile *pxQueueEmpty;
\r
86 void vConfigureQueues( xQueueHandle xQForRx, xQueueHandle xQForTx, portBASE_TYPE volatile *pxEmptyFlag )
\r
88 xRxedChars = xQForRx;
\r
89 xCharsForTx = xQForTx;
\r
90 pxQueueEmpty = pxEmptyFlag;
\r
92 /*-----------------------------------------------------------*/
\r
94 void vSerialISR( void )
\r
97 portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
\r
101 if( UART0->MIS & UART_IT_Transmit )
\r
103 /* The interrupt was caused by the THR becoming empty. Are there any
\r
104 more characters to transmit? */
\r
105 if( xQueueReceiveFromISR( xCharsForTx, &cChar, &xHigherPriorityTaskWoken ) == pdTRUE )
\r
107 /* A character was retrieved from the queue so can be sent to the
\r
113 *pxQueueEmpty = pdTRUE;
\r
116 UART_ClearITPendingBit( UART0, UART_IT_Transmit );
\r
119 if( UART0->MIS & UART_IT_Receive )
\r
121 /* The interrupt was caused by a character being received. Grab the
\r
122 character from the RHR and place it in the queue of received
\r
125 xQueueSendFromISR( xRxedChars, &cChar, &xHigherPriorityTaskWoken );
\r
126 UART_ClearITPendingBit( UART0, UART_IT_Receive );
\r
128 } while( UART0->MIS );
\r
130 /* If a task was woken by either a character being received or a character
\r
131 being transmitted then we may need to switch to another task. */
\r
132 portEND_SWITCHING_ISR( xHigherPriorityTaskWoken );
\r