git.sur5r.net Git - freertos/blob - FreeRTOS/Demo/AVR_ATMega323_IAR/ParTest/ParTest.c

   1 /*\r
   2     FreeRTOS V8.2.0rc1 - 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     This file is part of the FreeRTOS distribution.\r
   8 \r
   9     FreeRTOS is free software; you can redistribute it and/or modify it under\r
  10     the terms of the GNU General Public License (version 2) as published by the\r
  11     Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.\r
  12 \r
  13     >>!   NOTE: The modification to the GPL is included to allow you to     !<<\r
  14     >>!   distribute a combined work that includes FreeRTOS without being   !<<\r
  15     >>!   obliged to provide the source code for proprietary components     !<<\r
  16     >>!   outside of the FreeRTOS kernel.                                   !<<\r
  17 \r
  18     FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
  19     WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
  20     FOR A PARTICULAR PURPOSE.  Full license text is available on the following\r
  21     link: http://www.freertos.org/a00114.html\r
  22 \r
  23     1 tab == 4 spaces!\r
  24 \r
  25     ***************************************************************************\r
  26      *                                                                       *\r
  27      *    Having a problem?  Start by reading the FAQ "My application does   *\r
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  29      *                                                                       *\r
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  32     ***************************************************************************\r
  33 \r
  34     ***************************************************************************\r
  35      *                                                                       *\r
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  46     ***************************************************************************\r
  47 \r
  48     ***************************************************************************\r
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  62     ***************************************************************************\r
  63 \r
  64     ***************************************************************************\r
  65      *                                                                       *\r
  66      *    You are receiving this top quality software for free.  Please play *\r
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  73     ***************************************************************************\r
  74 \r
  75     http://www.FreeRTOS.org - Documentation, books, training, latest versions,\r
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  77 \r
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  92 \r
  93     1 tab == 4 spaces!\r
  94 */\r
  95 \r
  96 /* \r
  97 Changes from V2.0.0\r
  98 \r
  99         + Use scheduler suspends in place of critical sections.\r
 100 \r
 101 Changes from V2.6.0\r
 102 \r
 103         + Replaced the inb() and outb() functions with direct memory\r
 104           access.  This allows the port to be built with the 20050414 build of\r
 105           WinAVR.\r
 106 */\r
 107 \r
 108 #include "FreeRTOS.h"\r
 109 #include "task.h"\r
 110 #include "partest.h"\r
 111 \r
 112 /*-----------------------------------------------------------\r
 113  * Simple parallel port IO routines.\r
 114  *-----------------------------------------------------------*/\r
 115 \r
 116 #define partstALL_BITS_OUTPUT                   ( ( unsigned char ) 0xff )\r
 117 #define partstALL_OUTPUTS_OFF                   ( ( unsigned char ) 0xff )\r
 118 #define partstMAX_OUTPUT_LED                    ( ( unsigned char ) 7 )\r
 119 \r
 120 static volatile unsigned char ucCurrentOutputValue = partstALL_OUTPUTS_OFF; /*lint !e956 File scope parameters okay here. */\r
 121 \r
 122 /*-----------------------------------------------------------*/\r
 123 \r
 124 void vParTestInitialise( void )\r
 125 {\r
 126         ucCurrentOutputValue = partstALL_OUTPUTS_OFF;\r
 127 \r
 128         /* Set port B direction to outputs.  Start with all output off. */\r
 129         DDRB = partstALL_BITS_OUTPUT;\r
 130         PORTB = ucCurrentOutputValue;\r
 131 }\r
 132 /*-----------------------------------------------------------*/\r
 133 \r
 134 void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )\r
 135 {\r
 136 unsigned char ucBit = ( unsigned char ) 1;\r
 137 \r
 138         if( uxLED <= partstMAX_OUTPUT_LED )\r
 139         {\r
 140                 ucBit <<= uxLED;\r
 141 \r
 142                 vTaskSuspendAll();\r
 143                 {\r
 144                         if( xValue == pdTRUE )\r
 145                         {\r
 146                                 ucBit ^= ( unsigned char ) 0xff;\r
 147                                 ucCurrentOutputValue &= ucBit;\r
 148                         }\r
 149                         else\r
 150                         {\r
 151                                 ucCurrentOutputValue |= ucBit;\r
 152                         }\r
 153 \r
 154                         PORTB = ucCurrentOutputValue;\r
 155                 }\r
 156                 xTaskResumeAll();\r
 157         }\r
 158 }\r
 159 /*-----------------------------------------------------------*/\r
 160 \r
 161 void vParTestToggleLED( unsigned portBASE_TYPE uxLED )\r
 162 {\r
 163 unsigned char ucBit;\r
 164 \r
 165         if( uxLED <= partstMAX_OUTPUT_LED )\r
 166         {\r
 167                 ucBit = ( ( unsigned char ) 1 ) << uxLED;\r
 168 \r
 169                 vTaskSuspendAll();\r
 170                 {\r
 171                         if( ucCurrentOutputValue & ucBit )\r
 172                         {\r
 173                                 ucCurrentOutputValue &= ~ucBit;\r
 174                         }\r
 175                         else\r
 176                         {\r
 177                                 ucCurrentOutputValue |= ucBit;\r
 178                         }\r
 179 \r
 180                         PORTB = ucCurrentOutputValue;\r
 181                 }\r
 182                 xTaskResumeAll();                       \r
 183         }\r
 184 }\r
 185 \r
 186 \r