2 FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
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5 ***************************************************************************
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7 * FreeRTOS tutorial books are available in pdf and paperback. *
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8 * Complete, revised, and edited pdf reference manuals are also *
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11 * Purchasing FreeRTOS documentation will not only help you, by *
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12 * ensuring you get running as quickly as possible and with an *
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13 * in-depth knowledge of how to use FreeRTOS, it will also help *
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14 * the FreeRTOS project to continue with its mission of providing *
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15 * professional grade, cross platform, de facto standard solutions *
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16 * for microcontrollers - completely free of charge! *
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18 * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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20 * Thank you for using FreeRTOS, and thank you for your support! *
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22 ***************************************************************************
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25 This file is part of the FreeRTOS distribution.
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27 FreeRTOS is free software; you can redistribute it and/or modify it under
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28 the terms of the GNU General Public License (version 2) as published by the
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29 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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30 >>>NOTE<<< The modification to the GPL is included to allow you to
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31 distribute a combined work that includes FreeRTOS without being obliged to
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32 provide the source code for proprietary components outside of the FreeRTOS
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33 kernel. FreeRTOS is distributed in the hope that it will be useful, but
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34 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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35 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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36 more details. You should have received a copy of the GNU General Public
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37 License and the FreeRTOS license exception along with FreeRTOS; if not it
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38 can be viewed here: http://www.freertos.org/a00114.html and also obtained
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39 by writing to Richard Barry, contact details for whom are available on the
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44 ***************************************************************************
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46 * Having a problem? Start by reading the FAQ "My application does *
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47 * not run, what could be wrong? *
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49 * http://www.FreeRTOS.org/FAQHelp.html *
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51 ***************************************************************************
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54 http://www.FreeRTOS.org - Documentation, training, latest information,
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55 license and contact details.
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57 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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58 including FreeRTOS+Trace - an indispensable productivity tool.
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60 Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
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61 the code with commercial support, indemnification, and middleware, under
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62 the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
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63 provide a safety engineered and independently SIL3 certified version under
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64 the SafeRTOS brand: http://www.SafeRTOS.com.
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68 NOTE : Tasks run in system mode and the scheduler runs in Supervisor mode.
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69 The processor MUST be in supervisor mode when vTaskStartScheduler is
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70 called. The demo applications included in the FreeRTOS.org download switch
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71 to supervisor mode prior to main being called. If you are not using one of
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72 these demo application projects then ensure Supervisor mode is used.
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77 * Creates all the demo application tasks, then starts the scheduler. The WEB
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78 * documentation provides more details of the demo application tasks.
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80 * Main.c also creates a task called "Check". This only executes every three
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81 * seconds but has the highest priority so is guaranteed to get processor time.
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82 * Its main function is to check that all the other tasks are still operational.
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83 * Each task (other than the "flash" tasks) maintains a unique count that is
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84 * incremented each time the task successfully completes its function. Should
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85 * any error occur within such a task the count is permanently halted. The
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86 * check task inspects the count of each task to ensure it has changed since
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87 * the last time the check task executed. If all the count variables have
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88 * changed all the tasks are still executing error free, and the check task
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89 * toggles the onboard LED. Should any task contain an error at any time
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90 * the LED toggle rate will change from 3 seconds to 500ms.
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92 * To check the operation of the memory allocator the check task also
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93 * dynamically creates a task before delaying, and deletes it again when it
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94 * wakes. If memory cannot be allocated for the new task the call to xTaskCreate
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95 * will fail and an error is signalled. The dynamically created task itself
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96 * allocates and frees memory just to give the allocator a bit more exercise.
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101 Changes from V2.4.2
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103 + The vErrorChecks() task now dynamically creates then deletes a task each
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104 cycle. This tests the operation of the memory allocator.
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106 Changes from V2.5.2
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108 + vParTestInitialise() is called during initialisation to ensure all the
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113 /* Standard includes. */
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114 #include <stdlib.h>
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115 #include <string.h>
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117 /* Scheduler includes. */
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118 #include "FreeRTOS.h"
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121 /* Demo application includes. */
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122 #include "partest.h"
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124 #include "integer.h"
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126 #include "comtest2.h"
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127 #include "semtest.h"
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129 #include "dynamic.h"
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130 #include "BlockQ.h"
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131 #include "serial.h"
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133 /*-----------------------------------------------------------*/
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135 /* Constants to setup I/O. */
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136 #define mainTX_ENABLE ( ( unsigned long ) 0x0001 )
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137 #define mainRX_ENABLE ( ( unsigned long ) 0x0004 )
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138 #define mainP0_14 ( ( unsigned long ) 0x4000 )
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139 #define mainJTAG_PORT ( ( unsigned long ) 0x3E0000UL )
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141 /* Constants to setup the PLL. */
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142 #define mainPLL_MUL_4 ( ( unsigned char ) 0x0003 )
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143 #define mainPLL_DIV_1 ( ( unsigned char ) 0x0000 )
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144 #define mainPLL_ENABLE ( ( unsigned char ) 0x0001 )
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145 #define mainPLL_CONNECT ( ( unsigned char ) 0x0003 )
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146 #define mainPLL_FEED_BYTE1 ( ( unsigned char ) 0xaa )
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147 #define mainPLL_FEED_BYTE2 ( ( unsigned char ) 0x55 )
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148 #define mainPLL_LOCK ( ( unsigned long ) 0x0400 )
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150 /* Constants to setup the MAM. */
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151 #define mainMAM_TIM_3 ( ( unsigned char ) 0x03 )
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152 #define mainMAM_MODE_FULL ( ( unsigned char ) 0x02 )
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154 /* Constants to setup the peripheral bus. */
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155 #define mainBUS_CLK_FULL ( ( unsigned char ) 0x01 )
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157 /* Constants for the ComTest tasks. */
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158 #define mainCOM_TEST_BAUD_RATE ( ( unsigned long ) 115200 )
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159 #define mainCOM_TEST_LED ( 3 )
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161 /* Priorities for the demo application tasks. */
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162 #define mainLED_TASK_PRIORITY ( tskIDLE_PRIORITY + 3 )
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163 #define mainCOM_TEST_PRIORITY ( tskIDLE_PRIORITY + 2 )
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164 #define mainQUEUE_POLL_PRIORITY ( tskIDLE_PRIORITY + 0 )
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165 #define mainCHECK_TASK_PRIORITY ( tskIDLE_PRIORITY + 4 )
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166 #define mainSEM_TEST_PRIORITY ( tskIDLE_PRIORITY + 0 )
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167 #define mainBLOCK_Q_PRIORITY ( tskIDLE_PRIORITY + 2 )
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169 /* The rate at which the on board LED will toggle when there is/is not an
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171 #define mainNO_ERROR_FLASH_PERIOD ( ( portTickType ) 3000 / portTICK_RATE_MS )
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172 #define mainERROR_FLASH_PERIOD ( ( portTickType ) 500 / portTICK_RATE_MS )
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173 #define mainON_BOARD_LED_BIT ( ( unsigned long ) 0x80 )
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175 /* Constants used by the vMemCheckTask() task. */
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176 #define mainCOUNT_INITIAL_VALUE ( ( unsigned long ) 0 )
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177 #define mainNO_TASK ( 0 )
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179 /* The size of the memory blocks allocated by the vMemCheckTask() task. */
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180 #define mainMEM_CHECK_SIZE_1 ( ( size_t ) 51 )
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181 #define mainMEM_CHECK_SIZE_2 ( ( size_t ) 52 )
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182 #define mainMEM_CHECK_SIZE_3 ( ( size_t ) 151 )
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184 /*-----------------------------------------------------------*/
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187 * The Olimex demo board has a single built in LED. This function simply
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188 * toggles its state.
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190 void prvToggleOnBoardLED( void );
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193 * Checks that all the demo application tasks are still executing without error
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194 * - as described at the top of the file.
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196 static long prvCheckOtherTasksAreStillRunning( unsigned long ulMemCheckTaskCount );
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199 * The task that executes at the highest priority and calls
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200 * prvCheckOtherTasksAreStillRunning(). See the description at the top
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203 static void vErrorChecks( void *pvParameters );
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206 * Dynamically created and deleted during each cycle of the vErrorChecks()
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207 * task. This is done to check the operation of the memory allocator.
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208 * See the top of vErrorChecks for more details.
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210 static void vMemCheckTask( void *pvParameters );
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213 * Configure the processor for use with the Olimex demo board. This includes
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214 * setup for the I/O, system clock, and access timings.
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216 static void prvSetupHardware( void );
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218 /*-----------------------------------------------------------*/
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221 * Starts all the other tasks, then starts the scheduler.
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225 /* Setup the hardware for use with the Olimex demo board. */
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226 prvSetupHardware();
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228 /* Start the demo/test application tasks. */
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229 vStartIntegerMathTasks( tskIDLE_PRIORITY );
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230 vAltStartComTestTasks( mainCOM_TEST_PRIORITY, mainCOM_TEST_BAUD_RATE, mainCOM_TEST_LED );
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231 vStartLEDFlashTasks( mainLED_TASK_PRIORITY );
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232 vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY );
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233 vStartMathTasks( tskIDLE_PRIORITY );
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234 vStartSemaphoreTasks( mainSEM_TEST_PRIORITY );
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235 vStartDynamicPriorityTasks();
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236 vStartBlockingQueueTasks( mainBLOCK_Q_PRIORITY );
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238 /* Start the check task - which is defined in this file. */
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239 xTaskCreate( vErrorChecks, ( signed char * ) "Check", configMINIMAL_STACK_SIZE, NULL, mainCHECK_TASK_PRIORITY, NULL );
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241 /* Now all the tasks have been started - start the scheduler.
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243 NOTE : Tasks run in system mode and the scheduler runs in Supervisor mode.
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244 The processor MUST be in supervisor mode when vTaskStartScheduler is
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245 called. The demo applications included in the FreeRTOS.org download switch
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246 to supervisor mode prior to main being called. If you are not using one of
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247 these demo application projects then ensure Supervisor mode is used here. */
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248 vTaskStartScheduler();
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250 /* Should never reach here! */
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253 /*-----------------------------------------------------------*/
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255 static void vErrorChecks( void *pvParameters )
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257 portTickType xDelayPeriod = mainNO_ERROR_FLASH_PERIOD;
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258 unsigned long ulMemCheckTaskRunningCount;
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259 xTaskHandle xCreatedTask;
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261 /* The parameters are not used in this function. */
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262 ( void ) pvParameters;
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264 /* Cycle for ever, delaying then checking all the other tasks are still
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265 operating without error. If an error is detected then the delay period
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266 is decreased from mainNO_ERROR_FLASH_PERIOD to mainERROR_FLASH_PERIOD so
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267 the on board LED flash rate will increase.
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269 In addition to the standard tests the memory allocator is tested through
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270 the dynamic creation and deletion of a task each cycle. Each time the
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271 task is created memory must be allocated for its stack. When the task is
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272 deleted this memory is returned to the heap. If the task cannot be created
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273 then it is likely that the memory allocation failed. */
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277 /* Dynamically create a task - passing ulMemCheckTaskRunningCount as a
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279 ulMemCheckTaskRunningCount = mainCOUNT_INITIAL_VALUE;
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280 xCreatedTask = mainNO_TASK;
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282 if( xTaskCreate( vMemCheckTask, ( signed char * ) "MEM_CHECK", configMINIMAL_STACK_SIZE, ( void * ) &ulMemCheckTaskRunningCount, tskIDLE_PRIORITY, &xCreatedTask ) != pdPASS )
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284 /* Could not create the task - we have probably run out of heap. */
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285 xDelayPeriod = mainERROR_FLASH_PERIOD;
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288 /* Delay until it is time to execute again. */
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289 vTaskDelay( xDelayPeriod );
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291 /* Delete the dynamically created task. */
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292 if( xCreatedTask != mainNO_TASK )
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294 vTaskDelete( xCreatedTask );
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297 /* Check all the standard demo application tasks are executing without
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298 error. ulMemCheckTaskRunningCount is checked to ensure it was
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299 modified by the task just deleted. */
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300 if( prvCheckOtherTasksAreStillRunning( ulMemCheckTaskRunningCount ) != pdPASS )
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302 /* An error has been detected in one of the tasks - flash faster. */
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303 xDelayPeriod = mainERROR_FLASH_PERIOD;
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306 prvToggleOnBoardLED();
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309 /*-----------------------------------------------------------*/
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311 static void prvSetupHardware( void )
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313 #ifdef RUN_FROM_RAM
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314 /* Remap the interrupt vectors to RAM if we are are running from RAM. */
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318 /* Configure the RS2332 pins. All other pins remain at their default of 0. */
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319 PCB_PINSEL0 |= mainTX_ENABLE;
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320 PCB_PINSEL0 |= mainRX_ENABLE;
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322 /* Set all GPIO to output other than the P0.14 (BSL), and the JTAG pins.
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323 The JTAG pins are left as input as I'm not sure what will happen if the
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324 Wiggler is connected after powerup - not that it would be a good idea to
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326 GPIO_IODIR = ~( mainP0_14 + mainJTAG_PORT );
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328 /* Setup the PLL to multiply the XTAL input by 4. */
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329 SCB_PLLCFG = ( mainPLL_MUL_4 | mainPLL_DIV_1 );
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331 /* Activate the PLL by turning it on then feeding the correct sequence of
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333 SCB_PLLCON = mainPLL_ENABLE;
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334 SCB_PLLFEED = mainPLL_FEED_BYTE1;
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335 SCB_PLLFEED = mainPLL_FEED_BYTE2;
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337 /* Wait for the PLL to lock... */
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338 while( !( SCB_PLLSTAT & mainPLL_LOCK ) );
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340 /* ...before connecting it using the feed sequence again. */
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341 SCB_PLLCON = mainPLL_CONNECT;
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342 SCB_PLLFEED = mainPLL_FEED_BYTE1;
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343 SCB_PLLFEED = mainPLL_FEED_BYTE2;
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345 /* Setup and turn on the MAM. Three cycle access is used due to the fast
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346 PLL used. It is possible faster overall performance could be obtained by
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347 tuning the MAM and PLL settings. */
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348 MAM_TIM = mainMAM_TIM_3;
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349 MAM_CR = mainMAM_MODE_FULL;
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351 /* Setup the peripheral bus to be the same as the PLL output. */
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352 SCB_VPBDIV = mainBUS_CLK_FULL;
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354 /* Initialise LED outputs. */
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355 vParTestInitialise();
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357 /*-----------------------------------------------------------*/
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359 void prvToggleOnBoardLED( void )
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361 unsigned long ulState;
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363 ulState = GPIO0_IOPIN;
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364 if( ulState & mainON_BOARD_LED_BIT )
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366 GPIO_IOCLR = mainON_BOARD_LED_BIT;
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370 GPIO_IOSET = mainON_BOARD_LED_BIT;
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373 /*-----------------------------------------------------------*/
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375 static long prvCheckOtherTasksAreStillRunning( unsigned long ulMemCheckTaskCount )
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377 long lReturn = ( long ) pdPASS;
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379 /* Check all the demo tasks (other than the flash tasks) to ensure
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380 that they are all still running, and that none of them have detected
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383 if( xAreIntegerMathsTaskStillRunning() != pdTRUE )
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385 lReturn = ( long ) pdFAIL;
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388 if( xAreComTestTasksStillRunning() != pdTRUE )
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390 lReturn = ( long ) pdFAIL;
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393 if( xArePollingQueuesStillRunning() != pdTRUE )
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395 lReturn = ( long ) pdFAIL;
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398 if( xAreMathsTaskStillRunning() != pdTRUE )
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400 lReturn = ( long ) pdFAIL;
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403 if( xAreSemaphoreTasksStillRunning() != pdTRUE )
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405 lReturn = ( long ) pdFAIL;
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408 if( xAreDynamicPriorityTasksStillRunning() != pdTRUE )
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410 lReturn = ( long ) pdFAIL;
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413 if( xAreBlockingQueuesStillRunning() != pdTRUE )
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415 lReturn = ( long ) pdFAIL;
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418 if( ulMemCheckTaskCount == mainCOUNT_INITIAL_VALUE )
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420 /* The vMemCheckTask did not increment the counter - it must
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422 lReturn = ( long ) pdFAIL;
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427 /*-----------------------------------------------------------*/
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429 static void vMemCheckTask( void *pvParameters )
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431 unsigned long *pulMemCheckTaskRunningCounter;
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432 void *pvMem1, *pvMem2, *pvMem3;
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433 static long lErrorOccurred = pdFALSE;
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435 /* This task is dynamically created then deleted during each cycle of the
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436 vErrorChecks task to check the operation of the memory allocator. Each time
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437 the task is created memory is allocated for the stack and TCB. Each time
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438 the task is deleted this memory is returned to the heap. This task itself
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439 exercises the allocator by allocating and freeing blocks.
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441 The task executes at the idle priority so does not require a delay.
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443 pulMemCheckTaskRunningCounter is incremented each cycle to indicate to the
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444 vErrorChecks() task that this task is still executing without error. */
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446 pulMemCheckTaskRunningCounter = ( unsigned long * ) pvParameters;
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450 if( lErrorOccurred == pdFALSE )
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452 /* We have never seen an error so increment the counter. */
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453 ( *pulMemCheckTaskRunningCounter )++;
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456 /* Allocate some memory - just to give the allocator some extra
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457 exercise. This has to be in a critical section to ensure the
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458 task does not get deleted while it has memory allocated. */
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461 pvMem1 = pvPortMalloc( mainMEM_CHECK_SIZE_1 );
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462 if( pvMem1 == NULL )
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464 lErrorOccurred = pdTRUE;
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468 memset( pvMem1, 0xaa, mainMEM_CHECK_SIZE_1 );
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469 vPortFree( pvMem1 );
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474 /* Again - with a different size block. */
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477 pvMem2 = pvPortMalloc( mainMEM_CHECK_SIZE_2 );
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478 if( pvMem2 == NULL )
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480 lErrorOccurred = pdTRUE;
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484 memset( pvMem2, 0xaa, mainMEM_CHECK_SIZE_2 );
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485 vPortFree( pvMem2 );
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490 /* Again - with a different size block. */
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493 pvMem3 = pvPortMalloc( mainMEM_CHECK_SIZE_3 );
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494 if( pvMem3 == NULL )
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496 lErrorOccurred = pdTRUE;
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500 memset( pvMem3, 0xaa, mainMEM_CHECK_SIZE_3 );
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501 vPortFree( pvMem3 );
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