git.sur5r.net Git - freertos/blob - FreeRTOS/Demo/PC/ParTest/ParTest.c

   1 /*\r
   2     FreeRTOS V8.1.2 - Copyright (C) 2014 Real Time Engineers Ltd. \r
   3     All rights reserved\r
   4 \r
   5     VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.\r
   6 \r
   7     ***************************************************************************\r
   8      *                                                                       *\r
   9      *    FreeRTOS provides completely free yet professionally developed,    *\r
  10      *    robust, strictly quality controlled, supported, and cross          *\r
  11      *    platform software that has become a de facto standard.             *\r
  12      *                                                                       *\r
  13      *    Help yourself get started quickly and support the FreeRTOS         *\r
  14      *    project by purchasing a FreeRTOS tutorial book, reference          *\r
  15      *    manual, or both from: http://www.FreeRTOS.org/Documentation        *\r
  16      *                                                                       *\r
  17      *    Thank you!                                                         *\r
  18      *                                                                       *\r
  19     ***************************************************************************\r
  20 \r
  21     This file is part of the FreeRTOS distribution.\r
  22 \r
  23     FreeRTOS is free software; you can redistribute it and/or modify it under\r
  24     the terms of the GNU General Public License (version 2) as published by the\r
  25     Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.\r
  26 \r
  27     >>!   NOTE: The modification to the GPL is included to allow you to     !<<\r
  28     >>!   distribute a combined work that includes FreeRTOS without being   !<<\r
  29     >>!   obliged to provide the source code for proprietary components     !<<\r
  30     >>!   outside of the FreeRTOS kernel.                                   !<<\r
  31 \r
  32     FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
  33     WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
  34     FOR A PARTICULAR PURPOSE.  Full license text is available from the following\r
  35     link: http://www.freertos.org/a00114.html\r
  36 \r
  37     1 tab == 4 spaces!\r
  38 \r
  39     ***************************************************************************\r
  40      *                                                                       *\r
  41      *    Having a problem?  Start by reading the FAQ "My application does   *\r
  42      *    not run, what could be wrong?"                                     *\r
  43      *                                                                       *\r
  44      *    http://www.FreeRTOS.org/FAQHelp.html                               *\r
  45      *                                                                       *\r
  46     ***************************************************************************\r
  47 \r
  48     http://www.FreeRTOS.org - Documentation, books, training, latest versions,\r
  49     license and Real Time Engineers Ltd. contact details.\r
  50 \r
  51     http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
  52     including FreeRTOS+Trace - an indispensable productivity tool, a DOS\r
  53     compatible FAT file system, and our tiny thread aware UDP/IP stack.\r
  54 \r
  55     http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High\r
  56     Integrity Systems to sell under the OpenRTOS brand.  Low cost OpenRTOS\r
  57     licenses offer ticketed support, indemnification and middleware.\r
  58 \r
  59     http://www.SafeRTOS.com - High Integrity Systems also provide a safety\r
  60     engineered and independently SIL3 certified version for use in safety and\r
  61     mission critical applications that require provable dependability.\r
  62 \r
  63     1 tab == 4 spaces!\r
  64 */\r
  65 \r
  66 /*\r
  67 Changes from V1.01:\r
  68 \r
  69         + Types used updated.\r
  70         + Add vParTestToggleLED();\r
  71 \r
  72 \r
  73 Changes from V2.0.0\r
  74 \r
  75         + Use scheduler suspends in place of critical sections.\r
  76 */\r
  77 \r
  78 #include "FreeRTOS.h"\r
  79 #include "partest.h"\r
  80 #include "task.h"\r
  81 \r
  82 #define partstALL_OUTPUTS_OFF                   ( ( unsigned char ) 0x00 )\r
  83 #define partstMAX_OUTPUT_LED                    ( ( unsigned char ) 7 )\r
  84 \r
  85 /*lint -e956 File scope parameters okay here. */\r
  86 static unsigned short usPortAddress = partstDEFAULT_PORT_ADDRESS;\r
  87 static volatile unsigned char ucCurrentOutputValue = partstALL_OUTPUTS_OFF;\r
  88 /*lint +e956 */\r
  89 \r
  90 \r
  91 /*-----------------------------------------------------------\r
  92  * Simple parallel port IO routines\r
  93  *-----------------------------------------------------------*/\r
  94 \r
  95 void vParTestInitialise( void )\r
  96 {\r
  97         ucCurrentOutputValue = partstALL_OUTPUTS_OFF;\r
  98 \r
  99         portOUTPUT_BYTE( usPortAddress, ( unsigned ) partstALL_OUTPUTS_OFF );\r
 100 }\r
 101 /*-----------------------------------------------------------*/\r
 102 \r
 103 void vParTestSetLED( unsigned portBASE_TYPE uxLED, portBASE_TYPE xValue )\r
 104 {\r
 105 unsigned char ucBit = ( unsigned char ) 1;\r
 106 \r
 107         if( uxLED <= partstMAX_OUTPUT_LED )\r
 108         {\r
 109                 ucBit <<= uxLED;\r
 110         }       \r
 111 \r
 112         vTaskSuspendAll();\r
 113         {\r
 114                 if( xValue == pdTRUE )\r
 115                 {\r
 116                         ucBit ^= ( unsigned char ) 0xff;\r
 117                         ucCurrentOutputValue &= ucBit;\r
 118                 }\r
 119                 else\r
 120                 {\r
 121                         ucCurrentOutputValue |= ucBit;\r
 122                 }\r
 123 \r
 124                 portOUTPUT_BYTE( usPortAddress, ( unsigned ) ucCurrentOutputValue );\r
 125         }\r
 126         xTaskResumeAll();\r
 127 }\r
 128 /*-----------------------------------------------------------*/\r
 129 \r
 130 void vParTestToggleLED( unsigned portBASE_TYPE uxLED )\r
 131 {\r
 132 unsigned char ucBit;\r
 133 \r
 134         if( uxLED <= partstMAX_OUTPUT_LED )\r
 135         {\r
 136                 ucBit = ( ( unsigned char ) 1 ) << uxLED;\r
 137 \r
 138                 vTaskSuspendAll();\r
 139                 {\r
 140                         if( ucCurrentOutputValue & ucBit )\r
 141                         {\r
 142                                 ucCurrentOutputValue &= ~ucBit;\r
 143                         }\r
 144                         else\r
 145                         {\r
 146                                 ucCurrentOutputValue |= ucBit;\r
 147                         }\r
 148 \r
 149                         portOUTPUT_BYTE( usPortAddress, ( unsigned ) ucCurrentOutputValue );\r
 150                 }\r
 151                 xTaskResumeAll();                       \r
 152         }\r
 153 }\r
 154 \r