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

   1 /*\r
   2     FreeRTOS V8.1.0 - 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 Changes from V2.0.0\r
  73 \r
  74         + Use scheduler suspends in place of critical sections.\r
  75 */\r
  76 \r
  77 \r
  78 #include "FreeRTOS.h"\r
  79 #include "task.h"\r
  80 #include "partest.h"\r
  81 \r
  82 #define partstALL_OUTPUTS_OFF                   ( ( unsigned short) 0x00 )\r
  83 #define partstMAX_OUTPUT_LED                    ( ( unsigned char ) 7 )\r
  84 #define partstPORT_F_ADDR                               ( ( unsigned short ) 0x605 )\r
  85 #define partstPORT_DIRECTION_REG                ( ( unsigned short ) 0x606 )\r
  86 #define partstPORT_F_DIR_BIT                    ( ( unsigned short ) 0x20 )\r
  87 \r
  88 /*lint -e956 File scope parameters okay here. */\r
  89 static volatile unsigned char ucCurrentOutputValue = partstALL_OUTPUTS_OFF;\r
  90 /*lint +e956 */\r
  91 \r
  92 /*-----------------------------------------------------------\r
  93  * Simple parallel port IO routines.\r
  94  *-----------------------------------------------------------*/\r
  95 \r
  96 void vParTestInitialise( void )\r
  97 {\r
  98 unsigned short usInput;\r
  99 \r
 100         ucCurrentOutputValue = partstALL_OUTPUTS_OFF;\r
 101 \r
 102         /* Set the direction to output for port F. */\r
 103         usInput = portINPUT_BYTE( partstPORT_DIRECTION_REG );\r
 104         usInput |= partstPORT_F_DIR_BIT;\r
 105         portOUTPUT_BYTE( partstPORT_DIRECTION_REG, usInput );\r
 106 \r
 107         /* Start with all outputs off. */\r
 108         portOUTPUT_BYTE( partstPORT_F_ADDR, partstALL_OUTPUTS_OFF );\r
 109 }\r
 110 /*-----------------------------------------------------------*/\r
 111 \r
 112 void vParTestSetLED( unsigned portBASE_TYPE uxLED, portBASE_TYPE xValue )\r
 113 {\r
 114 unsigned char ucBit = ( unsigned char ) 1;\r
 115 \r
 116         if( uxLED <= partstMAX_OUTPUT_LED )\r
 117         {\r
 118                 ucBit <<= uxLED;\r
 119         }       \r
 120 \r
 121         vTaskSuspendAll();\r
 122         {\r
 123                 if( xValue == pdTRUE )\r
 124                 {\r
 125                         ucBit ^= ( unsigned char ) 0xff;\r
 126                         ucCurrentOutputValue &= ucBit;\r
 127                 }\r
 128                 else\r
 129                 {\r
 130                         ucCurrentOutputValue |= ucBit;\r
 131                 }\r
 132 \r
 133                 portOUTPUT_BYTE( partstPORT_F_ADDR, ( unsigned ) ucCurrentOutputValue );\r
 134         }\r
 135         xTaskResumeAll();\r
 136 }\r
 137 /*-----------------------------------------------------------*/\r
 138 \r
 139 void vParTestToggleLED( unsigned portBASE_TYPE uxLED )\r
 140 {\r
 141 unsigned char ucBit;\r
 142 \r
 143         if( uxLED <= partstMAX_OUTPUT_LED )\r
 144         {\r
 145                 ucBit = ( ( unsigned char ) 1 ) << uxLED;\r
 146 \r
 147                 vTaskSuspendAll();\r
 148                 {\r
 149                         if( ucCurrentOutputValue & ucBit )\r
 150                         {\r
 151                                 ucCurrentOutputValue &= ~ucBit;\r
 152                         }\r
 153                         else\r
 154                         {\r
 155                                 ucCurrentOutputValue |= ucBit;\r
 156                         }\r
 157 \r
 158                         portOUTPUT_BYTE( partstPORT_F_ADDR, ( unsigned ) ucCurrentOutputValue );\r
 159                 }\r
 160                 xTaskResumeAll();                       \r
 161         }\r
 162 }\r
 163 \r