git.sur5r.net Git - freertos/blob - FreeRTOS/Demo/PC/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
  28      *    not run, what could be wrong?".  Have you defined configASSERT()?  *\r
  29      *                                                                       *\r
  30      *    http://www.FreeRTOS.org/FAQHelp.html                               *\r
  31      *                                                                       *\r
  32     ***************************************************************************\r
  33 \r
  34     ***************************************************************************\r
  35      *                                                                       *\r
  36      *    FreeRTOS provides completely free yet professionally developed,    *\r
  37      *    robust, strictly quality controlled, supported, and cross          *\r
  38      *    platform software that is more than just the market leader, it     *\r
  39      *    is the industry's de facto standard.                               *\r
  40      *                                                                       *\r
  41      *    Help yourself get started quickly while simultaneously helping     *\r
  42      *    to support the FreeRTOS project by purchasing a FreeRTOS           *\r
  43      *    tutorial book, reference manual, or both:                          *\r
  44      *    http://www.FreeRTOS.org/Documentation                              *\r
  45      *                                                                       *\r
  46     ***************************************************************************\r
  47 \r
  48     ***************************************************************************\r
  49      *                                                                       *\r
  50      *   Investing in training allows your team to be as productive as       *\r
  51      *   possible as early as possible, lowering your overall development    *\r
  52      *   cost, and enabling you to bring a more robust product to market     *\r
  53      *   earlier than would otherwise be possible.  Richard Barry is both    *\r
  54      *   the architect and key author of FreeRTOS, and so also the world's   *\r
  55      *   leading authority on what is the world's most popular real time     *\r
  56      *   kernel for deeply embedded MCU designs.  Obtaining your training    *\r
  57      *   from Richard ensures your team will gain directly from his in-depth *\r
  58      *   product knowledge and years of usage experience.  Contact Real Time *\r
  59      *   Engineers Ltd to enquire about the FreeRTOS Masterclass, presented  *\r
  60      *   by Richard Barry:  http://www.FreeRTOS.org/contact\r
  61      *                                                                       *\r
  62     ***************************************************************************\r
  63 \r
  64     ***************************************************************************\r
  65      *                                                                       *\r
  66      *    You are receiving this top quality software for free.  Please play *\r
  67      *    fair and reciprocate by reporting any suspected issues and         *\r
  68      *    participating in the community forum:                              *\r
  69      *    http://www.FreeRTOS.org/support                                    *\r
  70      *                                                                       *\r
  71      *    Thank you!                                                         *\r
  72      *                                                                       *\r
  73     ***************************************************************************\r
  74 \r
  75     http://www.FreeRTOS.org - Documentation, books, training, latest versions,\r
  76     license and Real Time Engineers Ltd. contact details.\r
  77 \r
  78     http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
  79     including FreeRTOS+Trace - an indispensable productivity tool, a DOS\r
  80     compatible FAT file system, and our tiny thread aware UDP/IP stack.\r
  81 \r
  82     http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.\r
  83     Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.\r
  84 \r
  85     http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High\r
  86     Integrity Systems ltd. to sell under the OpenRTOS brand.  Low cost OpenRTOS\r
  87     licenses offer ticketed support, indemnification and commercial middleware.\r
  88 \r
  89     http://www.SafeRTOS.com - High Integrity Systems also provide a safety\r
  90     engineered and independently SIL3 certified version for use in safety and\r
  91     mission critical applications that require provable dependability.\r
  92 \r
  93     1 tab == 4 spaces!\r
  94 */\r
  95 \r
  96 /*\r
  97 Changes from V1.01:\r
  98 \r
  99         + Types used updated.\r
 100         + Add vParTestToggleLED();\r
 101 \r
 102 \r
 103 Changes from V2.0.0\r
 104 \r
 105         + Use scheduler suspends in place of critical sections.\r
 106 */\r
 107 \r
 108 #include "FreeRTOS.h"\r
 109 #include "partest.h"\r
 110 #include "task.h"\r
 111 \r
 112 #define partstALL_OUTPUTS_OFF                   ( ( unsigned char ) 0x00 )\r
 113 #define partstMAX_OUTPUT_LED                    ( ( unsigned char ) 7 )\r
 114 \r
 115 /*lint -e956 File scope parameters okay here. */\r
 116 static unsigned short usPortAddress = partstDEFAULT_PORT_ADDRESS;\r
 117 static volatile unsigned char ucCurrentOutputValue = partstALL_OUTPUTS_OFF;\r
 118 /*lint +e956 */\r
 119 \r
 120 \r
 121 /*-----------------------------------------------------------\r
 122  * Simple parallel port IO routines\r
 123  *-----------------------------------------------------------*/\r
 124 \r
 125 void vParTestInitialise( void )\r
 126 {\r
 127         ucCurrentOutputValue = partstALL_OUTPUTS_OFF;\r
 128 \r
 129         portOUTPUT_BYTE( usPortAddress, ( unsigned ) partstALL_OUTPUTS_OFF );\r
 130 }\r
 131 /*-----------------------------------------------------------*/\r
 132 \r
 133 void vParTestSetLED( unsigned portBASE_TYPE uxLED, portBASE_TYPE xValue )\r
 134 {\r
 135 unsigned char ucBit = ( unsigned char ) 1;\r
 136 \r
 137         if( uxLED <= partstMAX_OUTPUT_LED )\r
 138         {\r
 139                 ucBit <<= uxLED;\r
 140         }       \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                 portOUTPUT_BYTE( usPortAddress, ( unsigned ) ucCurrentOutputValue );\r
 155         }\r
 156         xTaskResumeAll();\r
 157 }\r
 158 /*-----------------------------------------------------------*/\r
 159 \r
 160 void vParTestToggleLED( unsigned portBASE_TYPE uxLED )\r
 161 {\r
 162 unsigned char ucBit;\r
 163 \r
 164         if( uxLED <= partstMAX_OUTPUT_LED )\r
 165         {\r
 166                 ucBit = ( ( unsigned char ) 1 ) << uxLED;\r
 167 \r
 168                 vTaskSuspendAll();\r
 169                 {\r
 170                         if( ucCurrentOutputValue & ucBit )\r
 171                         {\r
 172                                 ucCurrentOutputValue &= ~ucBit;\r
 173                         }\r
 174                         else\r
 175                         {\r
 176                                 ucCurrentOutputValue |= ucBit;\r
 177                         }\r
 178 \r
 179                         portOUTPUT_BYTE( usPortAddress, ( unsigned ) ucCurrentOutputValue );\r
 180                 }\r
 181                 xTaskResumeAll();                       \r
 182         }\r
 183 }\r
 184 \r