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

   1 /*\r
   2     FreeRTOS V7.5.1 - Copyright (C) 2013 Real Time Engineers Ltd.\r
   3 \r
   4     VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.\r
   5 \r
   6     ***************************************************************************\r
   7      *                                                                       *\r
   8      *    FreeRTOS provides completely free yet professionally developed,    *\r
   9      *    robust, strictly quality controlled, supported, and cross          *\r
  10      *    platform software that has become a de facto standard.             *\r
  11      *                                                                       *\r
  12      *    Help yourself get started quickly and support the FreeRTOS         *\r
  13      *    project by purchasing a FreeRTOS tutorial book, reference          *\r
  14      *    manual, or both from: http://www.FreeRTOS.org/Documentation        *\r
  15      *                                                                       *\r
  16      *    Thank you!                                                         *\r
  17      *                                                                       *\r
  18     ***************************************************************************\r
  19 \r
  20     This file is part of the FreeRTOS distribution.\r
  21 \r
  22     FreeRTOS is free software; you can redistribute it and/or modify it under\r
  23     the terms of the GNU General Public License (version 2) as published by the\r
  24     Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.\r
  25 \r
  26     >>! NOTE: The modification to the GPL is included to allow you to distribute\r
  27     >>! a combined work that includes FreeRTOS without being obliged to provide\r
  28     >>! the source code for proprietary components outside of the FreeRTOS\r
  29     >>! kernel.\r
  30 \r
  31     FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
  32     WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
  33     FOR A PARTICULAR PURPOSE.  Full license text is available from the following\r
  34     link: http://www.freertos.org/a00114.html\r
  35 \r
  36     1 tab == 4 spaces!\r
  37 \r
  38     ***************************************************************************\r
  39      *                                                                       *\r
  40      *    Having a problem?  Start by reading the FAQ "My application does   *\r
  41      *    not run, what could be wrong?"                                     *\r
  42      *                                                                       *\r
  43      *    http://www.FreeRTOS.org/FAQHelp.html                               *\r
  44      *                                                                       *\r
  45     ***************************************************************************\r
  46 \r
  47     http://www.FreeRTOS.org - Documentation, books, training, latest versions,\r
  48     license and Real Time Engineers Ltd. contact details.\r
  49 \r
  50     http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
  51     including FreeRTOS+Trace - an indispensable productivity tool, a DOS\r
  52     compatible FAT file system, and our tiny thread aware UDP/IP stack.\r
  53 \r
  54     http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High\r
  55     Integrity Systems to sell under the OpenRTOS brand.  Low cost OpenRTOS\r
  56     licenses offer ticketed support, indemnification and middleware.\r
  57 \r
  58     http://www.SafeRTOS.com - High Integrity Systems also provide a safety\r
  59     engineered and independently SIL3 certified version for use in safety and\r
  60     mission critical applications that require provable dependability.\r
  61 \r
  62     1 tab == 4 spaces!\r
  63 */\r
  64 \r
  65 /*\r
  66 Changes from V1.01:\r
  67 \r
  68         + Types used updated.\r
  69         + Add vParTestToggleLED();\r
  70 \r
  71 \r
  72 Changes from V2.0.0\r
  73 \r
  74         + Use scheduler suspends in place of critical sections.\r
  75 */\r
  76 \r
  77 #include "FreeRTOS.h"\r
  78 #include "partest.h"\r
  79 #include "task.h"\r
  80 \r
  81 #define partstALL_OUTPUTS_OFF                   ( ( unsigned char ) 0x00 )\r
  82 #define partstMAX_OUTPUT_LED                    ( ( unsigned char ) 7 )\r
  83 \r
  84 /*lint -e956 File scope parameters okay here. */\r
  85 static unsigned short usPortAddress = partstDEFAULT_PORT_ADDRESS;\r
  86 static volatile unsigned char ucCurrentOutputValue = partstALL_OUTPUTS_OFF;\r
  87 /*lint +e956 */\r
  88 \r
  89 \r
  90 /*-----------------------------------------------------------\r
  91  * Simple parallel port IO routines\r
  92  *-----------------------------------------------------------*/\r
  93 \r
  94 void vParTestInitialise( void )\r
  95 {\r
  96         ucCurrentOutputValue = partstALL_OUTPUTS_OFF;\r
  97 \r
  98         portOUTPUT_BYTE( usPortAddress, ( unsigned ) partstALL_OUTPUTS_OFF );\r
  99 }\r
 100 /*-----------------------------------------------------------*/\r
 101 \r
 102 void vParTestSetLED( unsigned portBASE_TYPE uxLED, portBASE_TYPE xValue )\r
 103 {\r
 104 unsigned char ucBit = ( unsigned char ) 1;\r
 105 \r
 106         if( uxLED <= partstMAX_OUTPUT_LED )\r
 107         {\r
 108                 ucBit <<= uxLED;\r
 109         }       \r
 110 \r
 111         vTaskSuspendAll();\r
 112         {\r
 113                 if( xValue == pdTRUE )\r
 114                 {\r
 115                         ucBit ^= ( unsigned char ) 0xff;\r
 116                         ucCurrentOutputValue &= ucBit;\r
 117                 }\r
 118                 else\r
 119                 {\r
 120                         ucCurrentOutputValue |= ucBit;\r
 121                 }\r
 122 \r
 123                 portOUTPUT_BYTE( usPortAddress, ( unsigned ) ucCurrentOutputValue );\r
 124         }\r
 125         xTaskResumeAll();\r
 126 }\r
 127 /*-----------------------------------------------------------*/\r
 128 \r
 129 void vParTestToggleLED( unsigned portBASE_TYPE uxLED )\r
 130 {\r
 131 unsigned char ucBit;\r
 132 \r
 133         if( uxLED <= partstMAX_OUTPUT_LED )\r
 134         {\r
 135                 ucBit = ( ( unsigned char ) 1 ) << uxLED;\r
 136 \r
 137                 vTaskSuspendAll();\r
 138                 {\r
 139                         if( ucCurrentOutputValue & ucBit )\r
 140                         {\r
 141                                 ucCurrentOutputValue &= ~ucBit;\r
 142                         }\r
 143                         else\r
 144                         {\r
 145                                 ucCurrentOutputValue |= ucBit;\r
 146                         }\r
 147 \r
 148                         portOUTPUT_BYTE( usPortAddress, ( unsigned ) ucCurrentOutputValue );\r
 149                 }\r
 150                 xTaskResumeAll();                       \r
 151         }\r
 152 }\r
 153 \r