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

   1 /*\r
   2         FreeRTOS.org V4.8.0 - Copyright (C) 2003-2008 Richard Barry.\r
   3 \r
   4         This file is part of the FreeRTOS.org distribution.\r
   5 \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
  10 \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
  15 \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
  19 \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
  24         can be applied.\r
  25 \r
  26         ***************************************************************************\r
  27         ***************************************************************************\r
  28         *                                                                                                                                                 *\r
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  30         * running on your hardware - or even write all or part of your application*\r
  31         * for you?  See http://www.OpenRTOS.com for details.                                      *\r
  32         *                                                                                                                                                 *\r
  33         ***************************************************************************\r
  34         ***************************************************************************\r
  35 \r
  36         Please ensure to read the configuration and relevant port sections of the\r
  37         online documentation.\r
  38 \r
  39         http://www.FreeRTOS.org - Documentation, latest information, license and \r
  40         contact details.\r
  41 \r
  42         http://www.SafeRTOS.com - A version that is certified for use in safety \r
  43         critical systems.\r
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  45         http://www.OpenRTOS.com - Commercial support, development, porting, \r
  46         licensing and training services.\r
  47 */\r
  48 \r
  49 /*\r
  50 Changes from V1.01:\r
  51 \r
  52         + Types used updated.\r
  53         + Add vParTestToggleLED();\r
  54 \r
  55 \r
  56 Changes from V2.0.0\r
  57 \r
  58         + Use scheduler suspends in place of critical sections.\r
  59 */\r
  60 \r
  61 #include "FreeRTOS.h"\r
  62 #include "partest.h"\r
  63 #include "task.h"\r
  64 \r
  65 #define partstALL_OUTPUTS_OFF                   ( ( unsigned portCHAR ) 0x00 )\r
  66 #define partstMAX_OUTPUT_LED                    ( ( unsigned portCHAR ) 7 )\r
  67 \r
  68 /*lint -e956 File scope parameters okay here. */\r
  69 static unsigned portSHORT usPortAddress = partstDEFAULT_PORT_ADDRESS;\r
  70 static volatile unsigned portCHAR ucCurrentOutputValue = partstALL_OUTPUTS_OFF;\r
  71 /*lint +e956 */\r
  72 \r
  73 \r
  74 /*-----------------------------------------------------------\r
  75  * Simple parallel port IO routines\r
  76  *-----------------------------------------------------------*/\r
  77 \r
  78 void vParTestInitialise( void )\r
  79 {\r
  80         ucCurrentOutputValue = partstALL_OUTPUTS_OFF;\r
  81 \r
  82         portOUTPUT_BYTE( usPortAddress, ( unsigned ) partstALL_OUTPUTS_OFF );\r
  83 }\r
  84 /*-----------------------------------------------------------*/\r
  85 \r
  86 void vParTestSetLED( unsigned portBASE_TYPE uxLED, portBASE_TYPE xValue )\r
  87 {\r
  88 unsigned portCHAR ucBit = ( unsigned portCHAR ) 1;\r
  89 \r
  90         if( uxLED <= partstMAX_OUTPUT_LED )\r
  91         {\r
  92                 ucBit <<= uxLED;\r
  93         }       \r
  94 \r
  95         vTaskSuspendAll();\r
  96         {\r
  97                 if( xValue == pdTRUE )\r
  98                 {\r
  99                         ucBit ^= ( unsigned portCHAR ) 0xff;\r
 100                         ucCurrentOutputValue &= ucBit;\r
 101                 }\r
 102                 else\r
 103                 {\r
 104                         ucCurrentOutputValue |= ucBit;\r
 105                 }\r
 106 \r
 107                 portOUTPUT_BYTE( usPortAddress, ( unsigned ) ucCurrentOutputValue );\r
 108         }\r
 109         xTaskResumeAll();\r
 110 }\r
 111 /*-----------------------------------------------------------*/\r
 112 \r
 113 void vParTestToggleLED( unsigned portBASE_TYPE uxLED )\r
 114 {\r
 115 unsigned portCHAR ucBit;\r
 116 \r
 117         if( uxLED <= partstMAX_OUTPUT_LED )\r
 118         {\r
 119                 ucBit = ( ( unsigned portCHAR ) 1 ) << uxLED;\r
 120 \r
 121                 vTaskSuspendAll();\r
 122                 {\r
 123                         if( ucCurrentOutputValue & ucBit )\r
 124                         {\r
 125                                 ucCurrentOutputValue &= ~ucBit;\r
 126                         }\r
 127                         else\r
 128                         {\r
 129                                 ucCurrentOutputValue |= ucBit;\r
 130                         }\r
 131 \r
 132                         portOUTPUT_BYTE( usPortAddress, ( unsigned ) ucCurrentOutputValue );\r
 133                 }\r
 134                 xTaskResumeAll();                       \r
 135         }\r
 136 }\r
 137 \r