2 FreeRTOS V7.4.0 - Copyright (C) 2013 Real Time Engineers Ltd.
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4 FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME. PLEASE VISIT
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5 http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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7 ***************************************************************************
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9 * FreeRTOS tutorial books are available in pdf and paperback. *
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10 * Complete, revised, and edited pdf reference manuals are also *
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13 * Purchasing FreeRTOS documentation will not only help you, by *
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14 * ensuring you get running as quickly as possible and with an *
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15 * in-depth knowledge of how to use FreeRTOS, it will also help *
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16 * the FreeRTOS project to continue with its mission of providing *
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17 * professional grade, cross platform, de facto standard solutions *
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18 * for microcontrollers - completely free of charge! *
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20 * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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22 * Thank you for using FreeRTOS, and thank you for your support! *
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24 ***************************************************************************
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27 This file is part of the FreeRTOS distribution.
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29 FreeRTOS is free software; you can redistribute it and/or modify it under
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30 the terms of the GNU General Public License (version 2) as published by the
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31 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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33 >>>>>>NOTE<<<<<< The modification to the GPL is included to allow you to
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34 distribute a combined work that includes FreeRTOS without being obliged to
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35 provide the source code for proprietary components outside of the FreeRTOS
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38 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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39 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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40 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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41 details. You should have received a copy of the GNU General Public License
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42 and the FreeRTOS license exception along with FreeRTOS; if not itcan be
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43 viewed here: http://www.freertos.org/a00114.html and also obtained by
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44 writing to Real Time Engineers Ltd., contact details for whom are available
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45 on the FreeRTOS WEB site.
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49 ***************************************************************************
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51 * Having a problem? Start by reading the FAQ "My application does *
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52 * not run, what could be wrong?" *
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54 * http://www.FreeRTOS.org/FAQHelp.html *
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56 ***************************************************************************
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59 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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60 license and Real Time Engineers Ltd. contact details.
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62 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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63 including FreeRTOS+Trace - an indispensable productivity tool, and our new
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64 fully thread aware and reentrant UDP/IP stack.
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66 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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67 Integrity Systems, who sell the code with commercial support,
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68 indemnification and middleware, under the OpenRTOS brand.
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70 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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71 engineered and independently SIL3 certified version for use in safety and
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72 mission critical applications that require provable dependability.
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76 NOTE : Tasks run in system mode and the scheduler runs in Supervisor mode.
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77 The processor MUST be in supervisor mode when vTaskStartScheduler is
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78 called. The demo applications included in the FreeRTOS.org download switch
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79 to supervisor mode prior to main being called. If you are not using one of
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80 these demo application projects then ensure Supervisor mode is used.
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85 * Creates all the demo application tasks, then starts the scheduler. The WEB
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86 * documentation provides more details of the demo application tasks.
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88 * Main.c also creates a task called "Check". This only executes every three
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89 * seconds but has the highest priority so is guaranteed to get processor time.
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90 * Its main function is to check that all the other tasks are still operational.
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91 * Each task (other than the "flash" tasks) maintains a unique count that is
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92 * incremented each time the task successfully completes its function. Should
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93 * any error occur within such a task the count is permanently halted. The
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94 * check task inspects the count of each task to ensure it has changed since
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95 * the last time the check task executed. If all the count variables have
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96 * changed all the tasks are still executing error free, and the check task
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97 * toggles the onboard LED. Should any task contain an error at any time
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98 * the LED toggle rate will change from 3 seconds to 500ms.
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100 * To check the operation of the memory allocator the check task also
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101 * dynamically creates a task before delaying, and deletes it again when it
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102 * wakes. If memory cannot be allocated for the new task the call to xTaskCreate
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103 * will fail and an error is signalled. The dynamically created task itself
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104 * allocates and frees memory just to give the allocator a bit more exercise.
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109 Changes from V2.4.2
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111 + The vErrorChecks() task now dynamically creates then deletes a task each
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112 cycle. This tests the operation of the memory allocator.
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114 Changes from V2.5.2
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116 + vParTestInitialise() is called during initialisation to ensure all the
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121 /* Standard includes. */
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122 #include <stdlib.h>
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123 #include <string.h>
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125 /* Scheduler includes. */
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126 #include "FreeRTOS.h"
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129 /* Demo application includes. */
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130 #include "partest.h"
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132 #include "integer.h"
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134 #include "comtest2.h"
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135 #include "semtest.h"
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137 #include "dynamic.h"
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138 #include "BlockQ.h"
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139 #include "serial.h"
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141 /*-----------------------------------------------------------*/
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143 /* Constants to setup I/O. */
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144 #define mainTX_ENABLE ( ( unsigned long ) 0x0001 )
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145 #define mainRX_ENABLE ( ( unsigned long ) 0x0004 )
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146 #define mainP0_14 ( ( unsigned long ) 0x4000 )
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147 #define mainJTAG_PORT ( ( unsigned long ) 0x3E0000UL )
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149 /* Constants to setup the PLL. */
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150 #define mainPLL_MUL_4 ( ( unsigned char ) 0x0003 )
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151 #define mainPLL_DIV_1 ( ( unsigned char ) 0x0000 )
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152 #define mainPLL_ENABLE ( ( unsigned char ) 0x0001 )
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153 #define mainPLL_CONNECT ( ( unsigned char ) 0x0003 )
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154 #define mainPLL_FEED_BYTE1 ( ( unsigned char ) 0xaa )
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155 #define mainPLL_FEED_BYTE2 ( ( unsigned char ) 0x55 )
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156 #define mainPLL_LOCK ( ( unsigned long ) 0x0400 )
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158 /* Constants to setup the MAM. */
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159 #define mainMAM_TIM_3 ( ( unsigned char ) 0x03 )
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160 #define mainMAM_MODE_FULL ( ( unsigned char ) 0x02 )
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162 /* Constants to setup the peripheral bus. */
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163 #define mainBUS_CLK_FULL ( ( unsigned char ) 0x01 )
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165 /* Constants for the ComTest tasks. */
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166 #define mainCOM_TEST_BAUD_RATE ( ( unsigned long ) 115200 )
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167 #define mainCOM_TEST_LED ( 3 )
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169 /* Priorities for the demo application tasks. */
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170 #define mainLED_TASK_PRIORITY ( tskIDLE_PRIORITY + 3 )
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171 #define mainCOM_TEST_PRIORITY ( tskIDLE_PRIORITY + 2 )
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172 #define mainQUEUE_POLL_PRIORITY ( tskIDLE_PRIORITY + 0 )
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173 #define mainCHECK_TASK_PRIORITY ( tskIDLE_PRIORITY + 4 )
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174 #define mainSEM_TEST_PRIORITY ( tskIDLE_PRIORITY + 0 )
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175 #define mainBLOCK_Q_PRIORITY ( tskIDLE_PRIORITY + 2 )
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177 /* The rate at which the on board LED will toggle when there is/is not an
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179 #define mainNO_ERROR_FLASH_PERIOD ( ( portTickType ) 3000 / portTICK_RATE_MS )
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180 #define mainERROR_FLASH_PERIOD ( ( portTickType ) 500 / portTICK_RATE_MS )
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181 #define mainON_BOARD_LED_BIT ( ( unsigned long ) 0x80 )
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183 /* Constants used by the vMemCheckTask() task. */
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184 #define mainCOUNT_INITIAL_VALUE ( ( unsigned long ) 0 )
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185 #define mainNO_TASK ( 0 )
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187 /* The size of the memory blocks allocated by the vMemCheckTask() task. */
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188 #define mainMEM_CHECK_SIZE_1 ( ( size_t ) 51 )
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189 #define mainMEM_CHECK_SIZE_2 ( ( size_t ) 52 )
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190 #define mainMEM_CHECK_SIZE_3 ( ( size_t ) 151 )
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192 /*-----------------------------------------------------------*/
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195 * The Olimex demo board has a single built in LED. This function simply
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196 * toggles its state.
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198 void prvToggleOnBoardLED( void );
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201 * Checks that all the demo application tasks are still executing without error
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202 * - as described at the top of the file.
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204 static long prvCheckOtherTasksAreStillRunning( unsigned long ulMemCheckTaskCount );
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207 * The task that executes at the highest priority and calls
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208 * prvCheckOtherTasksAreStillRunning(). See the description at the top
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211 static void vErrorChecks( void *pvParameters );
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214 * Dynamically created and deleted during each cycle of the vErrorChecks()
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215 * task. This is done to check the operation of the memory allocator.
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216 * See the top of vErrorChecks for more details.
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218 static void vMemCheckTask( void *pvParameters );
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221 * Configure the processor for use with the Olimex demo board. This includes
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222 * setup for the I/O, system clock, and access timings.
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224 static void prvSetupHardware( void );
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226 /*-----------------------------------------------------------*/
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229 * Starts all the other tasks, then starts the scheduler.
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233 /* Setup the hardware for use with the Olimex demo board. */
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234 prvSetupHardware();
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236 /* Start the demo/test application tasks. */
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237 vStartIntegerMathTasks( tskIDLE_PRIORITY );
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238 vAltStartComTestTasks( mainCOM_TEST_PRIORITY, mainCOM_TEST_BAUD_RATE, mainCOM_TEST_LED );
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239 vStartLEDFlashTasks( mainLED_TASK_PRIORITY );
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240 vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY );
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241 vStartMathTasks( tskIDLE_PRIORITY );
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242 vStartSemaphoreTasks( mainSEM_TEST_PRIORITY );
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243 vStartDynamicPriorityTasks();
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244 vStartBlockingQueueTasks( mainBLOCK_Q_PRIORITY );
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246 /* Start the check task - which is defined in this file. */
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247 xTaskCreate( vErrorChecks, ( signed char * ) "Check", configMINIMAL_STACK_SIZE, NULL, mainCHECK_TASK_PRIORITY, NULL );
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249 /* Now all the tasks have been started - start the scheduler.
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251 NOTE : Tasks run in system mode and the scheduler runs in Supervisor mode.
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252 The processor MUST be in supervisor mode when vTaskStartScheduler is
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253 called. The demo applications included in the FreeRTOS.org download switch
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254 to supervisor mode prior to main being called. If you are not using one of
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255 these demo application projects then ensure Supervisor mode is used here. */
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256 vTaskStartScheduler();
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258 /* Should never reach here! */
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261 /*-----------------------------------------------------------*/
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263 static void vErrorChecks( void *pvParameters )
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265 portTickType xDelayPeriod = mainNO_ERROR_FLASH_PERIOD;
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266 unsigned long ulMemCheckTaskRunningCount;
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267 xTaskHandle xCreatedTask;
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269 /* The parameters are not used in this function. */
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270 ( void ) pvParameters;
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272 /* Cycle for ever, delaying then checking all the other tasks are still
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273 operating without error. If an error is detected then the delay period
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274 is decreased from mainNO_ERROR_FLASH_PERIOD to mainERROR_FLASH_PERIOD so
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275 the on board LED flash rate will increase.
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277 In addition to the standard tests the memory allocator is tested through
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278 the dynamic creation and deletion of a task each cycle. Each time the
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279 task is created memory must be allocated for its stack. When the task is
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280 deleted this memory is returned to the heap. If the task cannot be created
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281 then it is likely that the memory allocation failed. */
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285 /* Dynamically create a task - passing ulMemCheckTaskRunningCount as a
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287 ulMemCheckTaskRunningCount = mainCOUNT_INITIAL_VALUE;
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288 xCreatedTask = mainNO_TASK;
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290 if( xTaskCreate( vMemCheckTask, ( signed char * ) "MEM_CHECK", configMINIMAL_STACK_SIZE, ( void * ) &ulMemCheckTaskRunningCount, tskIDLE_PRIORITY, &xCreatedTask ) != pdPASS )
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292 /* Could not create the task - we have probably run out of heap. */
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293 xDelayPeriod = mainERROR_FLASH_PERIOD;
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296 /* Delay until it is time to execute again. */
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297 vTaskDelay( xDelayPeriod );
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299 /* Delete the dynamically created task. */
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300 if( xCreatedTask != mainNO_TASK )
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302 vTaskDelete( xCreatedTask );
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305 /* Check all the standard demo application tasks are executing without
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306 error. ulMemCheckTaskRunningCount is checked to ensure it was
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307 modified by the task just deleted. */
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308 if( prvCheckOtherTasksAreStillRunning( ulMemCheckTaskRunningCount ) != pdPASS )
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310 /* An error has been detected in one of the tasks - flash faster. */
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311 xDelayPeriod = mainERROR_FLASH_PERIOD;
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314 prvToggleOnBoardLED();
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317 /*-----------------------------------------------------------*/
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319 static void prvSetupHardware( void )
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321 #ifdef RUN_FROM_RAM
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322 /* Remap the interrupt vectors to RAM if we are are running from RAM. */
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326 /* Configure the RS2332 pins. All other pins remain at their default of 0. */
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327 PCB_PINSEL0 |= mainTX_ENABLE;
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328 PCB_PINSEL0 |= mainRX_ENABLE;
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330 /* Set all GPIO to output other than the P0.14 (BSL), and the JTAG pins.
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331 The JTAG pins are left as input as I'm not sure what will happen if the
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332 Wiggler is connected after powerup - not that it would be a good idea to
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334 GPIO_IODIR = ~( mainP0_14 + mainJTAG_PORT );
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336 /* Setup the PLL to multiply the XTAL input by 4. */
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337 SCB_PLLCFG = ( mainPLL_MUL_4 | mainPLL_DIV_1 );
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339 /* Activate the PLL by turning it on then feeding the correct sequence of
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341 SCB_PLLCON = mainPLL_ENABLE;
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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 /* Wait for the PLL to lock... */
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346 while( !( SCB_PLLSTAT & mainPLL_LOCK ) );
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348 /* ...before connecting it using the feed sequence again. */
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349 SCB_PLLCON = mainPLL_CONNECT;
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350 SCB_PLLFEED = mainPLL_FEED_BYTE1;
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351 SCB_PLLFEED = mainPLL_FEED_BYTE2;
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353 /* Setup and turn on the MAM. Three cycle access is used due to the fast
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354 PLL used. It is possible faster overall performance could be obtained by
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355 tuning the MAM and PLL settings. */
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356 MAM_TIM = mainMAM_TIM_3;
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357 MAM_CR = mainMAM_MODE_FULL;
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359 /* Setup the peripheral bus to be the same as the PLL output. */
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360 SCB_VPBDIV = mainBUS_CLK_FULL;
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362 /* Initialise LED outputs. */
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363 vParTestInitialise();
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365 /*-----------------------------------------------------------*/
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367 void prvToggleOnBoardLED( void )
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369 unsigned long ulState;
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371 ulState = GPIO0_IOPIN;
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372 if( ulState & mainON_BOARD_LED_BIT )
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374 GPIO_IOCLR = mainON_BOARD_LED_BIT;
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378 GPIO_IOSET = mainON_BOARD_LED_BIT;
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381 /*-----------------------------------------------------------*/
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383 static long prvCheckOtherTasksAreStillRunning( unsigned long ulMemCheckTaskCount )
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385 long lReturn = ( long ) pdPASS;
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387 /* Check all the demo tasks (other than the flash tasks) to ensure
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388 that they are all still running, and that none of them have detected
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391 if( xAreIntegerMathsTaskStillRunning() != pdTRUE )
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393 lReturn = ( long ) pdFAIL;
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396 if( xAreComTestTasksStillRunning() != pdTRUE )
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398 lReturn = ( long ) pdFAIL;
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401 if( xArePollingQueuesStillRunning() != pdTRUE )
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403 lReturn = ( long ) pdFAIL;
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406 if( xAreMathsTaskStillRunning() != pdTRUE )
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408 lReturn = ( long ) pdFAIL;
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411 if( xAreSemaphoreTasksStillRunning() != pdTRUE )
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413 lReturn = ( long ) pdFAIL;
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416 if( xAreDynamicPriorityTasksStillRunning() != pdTRUE )
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418 lReturn = ( long ) pdFAIL;
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421 if( xAreBlockingQueuesStillRunning() != pdTRUE )
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423 lReturn = ( long ) pdFAIL;
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426 if( ulMemCheckTaskCount == mainCOUNT_INITIAL_VALUE )
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428 /* The vMemCheckTask did not increment the counter - it must
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430 lReturn = ( long ) pdFAIL;
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435 /*-----------------------------------------------------------*/
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437 static void vMemCheckTask( void *pvParameters )
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439 unsigned long *pulMemCheckTaskRunningCounter;
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440 void *pvMem1, *pvMem2, *pvMem3;
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441 static long lErrorOccurred = pdFALSE;
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443 /* This task is dynamically created then deleted during each cycle of the
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444 vErrorChecks task to check the operation of the memory allocator. Each time
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445 the task is created memory is allocated for the stack and TCB. Each time
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446 the task is deleted this memory is returned to the heap. This task itself
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447 exercises the allocator by allocating and freeing blocks.
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449 The task executes at the idle priority so does not require a delay.
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451 pulMemCheckTaskRunningCounter is incremented each cycle to indicate to the
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452 vErrorChecks() task that this task is still executing without error. */
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454 pulMemCheckTaskRunningCounter = ( unsigned long * ) pvParameters;
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458 if( lErrorOccurred == pdFALSE )
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460 /* We have never seen an error so increment the counter. */
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461 ( *pulMemCheckTaskRunningCounter )++;
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464 /* Allocate some memory - just to give the allocator some extra
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465 exercise. This has to be in a critical section to ensure the
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466 task does not get deleted while it has memory allocated. */
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469 pvMem1 = pvPortMalloc( mainMEM_CHECK_SIZE_1 );
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470 if( pvMem1 == NULL )
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472 lErrorOccurred = pdTRUE;
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476 memset( pvMem1, 0xaa, mainMEM_CHECK_SIZE_1 );
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477 vPortFree( pvMem1 );
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482 /* Again - with a different size block. */
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485 pvMem2 = pvPortMalloc( mainMEM_CHECK_SIZE_2 );
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486 if( pvMem2 == NULL )
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488 lErrorOccurred = pdTRUE;
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492 memset( pvMem2, 0xaa, mainMEM_CHECK_SIZE_2 );
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493 vPortFree( pvMem2 );
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498 /* Again - with a different size block. */
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501 pvMem3 = pvPortMalloc( mainMEM_CHECK_SIZE_3 );
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502 if( pvMem3 == NULL )
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504 lErrorOccurred = pdTRUE;
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508 memset( pvMem3, 0xaa, mainMEM_CHECK_SIZE_3 );
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509 vPortFree( pvMem3 );
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