git.sur5r.net Git - freertos/blob - FreeRTOS/Demo/AVR_ATMega323_WinAVR/ParTest/ParTest.c

   1 /*\r
   2     FreeRTOS V8.0.0:rc1 - 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 distribute\r
  28     >>! a combined work that includes FreeRTOS without being obliged to provide\r
  29     >>! the source code for proprietary components outside of the FreeRTOS\r
  30     >>! 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 V2.0.0\r
  68 \r
  69         + Use scheduler suspends in place of critical sections.\r
  70 \r
  71 Changes from V2.6.0\r
  72 \r
  73         + Replaced the inb() and outb() functions with direct memory\r
  74           access.  This allows the port to be built with the 20050414 build of\r
  75           WinAVR.\r
  76 */\r
  77 \r
  78 #include "FreeRTOS.h"\r
  79 #include "task.h"\r
  80 #include "partest.h"\r
  81 \r
  82 /*-----------------------------------------------------------\r
  83  * Simple parallel port IO routines.\r
  84  *-----------------------------------------------------------*/\r
  85 \r
  86 #define partstALL_BITS_OUTPUT                   ( ( unsigned char ) 0xff )\r
  87 #define partstALL_OUTPUTS_OFF                   ( ( unsigned char ) 0xff )\r
  88 #define partstMAX_OUTPUT_LED                    ( ( unsigned char ) 7 )\r
  89 \r
  90 static volatile unsigned char ucCurrentOutputValue = partstALL_OUTPUTS_OFF; /*lint !e956 File scope parameters okay here. */\r
  91 \r
  92 /*-----------------------------------------------------------*/\r
  93 \r
  94 void vParTestInitialise( void )\r
  95 {\r
  96         ucCurrentOutputValue = partstALL_OUTPUTS_OFF;\r
  97 \r
  98         /* Set port B direction to outputs.  Start with all output off. */\r
  99         DDRB = partstALL_BITS_OUTPUT;\r
 100         PORTB = ucCurrentOutputValue;\r
 101 }\r
 102 /*-----------------------------------------------------------*/\r
 103 \r
 104 void vParTestSetLED( unsigned portBASE_TYPE uxLED, signed portBASE_TYPE xValue )\r
 105 {\r
 106 unsigned char ucBit = ( unsigned char ) 1;\r
 107 \r
 108         if( uxLED <= partstMAX_OUTPUT_LED )\r
 109         {\r
 110                 ucBit <<= uxLED;        \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                         PORTB = ucCurrentOutputValue;\r
 125                 }\r
 126                 xTaskResumeAll();\r
 127         }\r
 128 }\r
 129 /*-----------------------------------------------------------*/\r
 130 \r
 131 void vParTestToggleLED( unsigned portBASE_TYPE uxLED )\r
 132 {\r
 133 unsigned char ucBit;\r
 134 \r
 135         if( uxLED <= partstMAX_OUTPUT_LED )\r
 136         {\r
 137                 ucBit = ( ( unsigned char ) 1 ) << uxLED;\r
 138 \r
 139                 vTaskSuspendAll();\r
 140                 {\r
 141                         if( ucCurrentOutputValue & ucBit )\r
 142                         {\r
 143                                 ucCurrentOutputValue &= ~ucBit;\r
 144                         }\r
 145                         else\r
 146                         {\r
 147                                 ucCurrentOutputValue |= ucBit;\r
 148                         }\r
 149 \r
 150                         PORTB = ucCurrentOutputValue;\r
 151                 }\r
 152                 xTaskResumeAll();                       \r
 153         }\r
 154 }\r
 155 \r
 156 \r