2 FreeRTOS.org V4.0.3 - copyright (C) 2003-2006 Richard Barry.
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4 This file is part of the FreeRTOS.org distribution.
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6 FreeRTOS.org is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2 of the License, or
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9 (at your option) any later version.
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11 FreeRTOS.org is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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16 You should have received a copy of the GNU General Public License
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17 along with FreeRTOS.org; if not, write to the Free Software
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18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 A special exception to the GPL can be applied should you wish to distribute
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21 a combined work that includes FreeRTOS.org, without being obliged to provide
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22 the source code for any proprietary components. See the licensing section
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23 of http://www.FreeRTOS.org for full details of how and when the exception
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26 ***************************************************************************
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27 See http://www.FreeRTOS.org for documentation, latest information, license
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28 and contact details. Please ensure to read the configuration and relevant
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29 port sections of the online documentation.
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30 ***************************************************************************
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34 NOTE : Tasks run in system mode and the scheduler runs in Supervisor mode.
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35 The processor MUST be in supervisor mode when vTaskStartScheduler is
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36 called. The demo applications included in the FreeRTOS.org download switch
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37 to supervisor mode prior to main being called. If you are not using one of
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38 these demo application projects then ensure Supervisor mode is used.
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43 * Program entry point.
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45 * main() is responsible for setting up the microcontroller peripherals, then
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46 * starting the demo application tasks. Once the tasks have been created the
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47 * scheduler is started and main() should never complete.
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49 * The demo creates the three standard 'flash' tasks to provide some visual
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50 * feedback that the system and scheduler are still operating correctly.
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52 * The HTTP server task operates at the highest priority so will always preempt
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53 * the flash or idle task on TCP/IP events.
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56 /* Standard includes. */
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59 /* Scheduler include files. */
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60 #include "FreeRTOS.h"
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64 /* Application includes. */
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66 #include "HTTP_Serv.h"
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68 #include "partest.h"
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69 #include "dynamic.h"
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70 #include "semtest.h"
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73 #include "integer.h"
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75 /*-----------------------------------------------------------*/
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77 /* Constants to setup the PLL. */
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78 #define mainPLL_MUL_4 ( ( unsigned portCHAR ) 0x0003 )
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79 #define mainPLL_DIV_1 ( ( unsigned portCHAR ) 0x0000 )
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80 #define mainPLL_ENABLE ( ( unsigned portCHAR ) 0x0001 )
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81 #define mainPLL_CONNECT ( ( unsigned portCHAR ) 0x0003 )
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82 #define mainPLL_FEED_BYTE1 ( ( unsigned portCHAR ) 0xaa )
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83 #define mainPLL_FEED_BYTE2 ( ( unsigned portCHAR ) 0x55 )
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84 #define mainPLL_LOCK ( ( unsigned portLONG ) 0x0400 )
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86 /* Constants to setup the MAM. */
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87 #define mainMAM_TIM_3 ( ( unsigned portCHAR ) 0x03 )
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88 #define mainMAM_MODE_FULL ( ( unsigned portCHAR ) 0x02 )
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90 /* Constants to setup the peripheral bus. */
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91 #define mainBUS_CLK_FULL ( ( unsigned portCHAR ) 0x01 )
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93 /* Constants to setup I/O and processor. */
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94 #define mainBUS_CLK_FULL ( ( unsigned portCHAR ) 0x01 )
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95 #define mainLED_TO_OUTPUT ( ( unsigned portLONG ) 0xff0000 )
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96 #define mainJTAG_PORT ( ( unsigned portLONG ) 0x3E0000UL )
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98 /* Priorities for the demo application tasks. */
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99 #define mainLED_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )
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100 #define mainHTTP_TASK_PRIORITY ( tskIDLE_PRIORITY + 2 )
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101 #define mainBLOCK_Q_PRIORITY ( tskIDLE_PRIORITY + 2 )
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102 #define mainQUEUE_POLL_PRIORITY ( tskIDLE_PRIORITY + 2 )
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103 #define mainERROR_CHECK_PRIORITY ( tskIDLE_PRIORITY + 1 )
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105 /* Flash rates of the on board LED to indicate the health of the system. */
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106 #define mainNO_ERROR_DELAY ( 3000 )
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107 #define mainERROR_DELAY ( 500 )
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108 #define mainON_BOARD_LED_BIT ( ( unsigned portLONG ) 0x80 )
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110 /*-----------------------------------------------------------*/
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113 * The Olimex demo board has a single built in LED. This function simply
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114 * toggles its state.
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116 void prvToggleOnBoardLED( void );
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119 * Configure the processor for use with the Olimex demo board.
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121 static void prvSetupHardware( void );
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124 * Simply check for errors and toggle the onboard LED.
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126 static void prvErrorChecks( void *pvParameters );
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129 * Return true if the demo tasks are executing without error - otherwise
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132 static void prvMainCheckOtherTasksAreStillRunning( void );
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133 /*-----------------------------------------------------------*/
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135 /* Flag set by prvMainCheckOtherTasksAreStillExecuting(). */
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136 portLONG lErrorInTask = pdFALSE;
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139 * Application entry point:
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140 * Starts all the other tasks, then starts the scheduler.
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144 /* Setup the hardware for use with the Olimex demo board. */
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145 prvSetupHardware();
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147 /* Start the standard flash tasks so the WEB server is not the only thing
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149 vStartLEDFlashTasks( mainLED_TASK_PRIORITY );
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150 vStartSemaphoreTasks( tskIDLE_PRIORITY );
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151 vStartDynamicPriorityTasks();
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152 vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY );
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153 vStartBlockingQueueTasks( mainBLOCK_Q_PRIORITY );
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154 vStartIntegerMathTasks( tskIDLE_PRIORITY );
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156 /* Start the WEB server task and the error check task. */
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157 xTaskCreate( vHTTPServerTask, ( signed portCHAR * ) "HTTP", configMINIMAL_STACK_SIZE, NULL, mainHTTP_TASK_PRIORITY, NULL );
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158 xTaskCreate( prvErrorChecks, ( signed portCHAR * ) "Check", configMINIMAL_STACK_SIZE, NULL, mainERROR_CHECK_PRIORITY, NULL );
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160 /* Now all the tasks have been started - start the scheduler.
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162 NOTE : Tasks run in system mode and the scheduler runs in Supervisor mode.
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163 The processor MUST be in supervisor mode when vTaskStartScheduler is
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164 called. The demo applications included in the FreeRTOS.org download switch
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165 to supervisor mode prior to main being called. If you are not using one of
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166 these demo application projects then ensure Supervisor mode is used. */
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167 vTaskStartScheduler();
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169 /* Should never reach here! */
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172 /*-----------------------------------------------------------*/
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174 static void prvSetupHardware( void )
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176 #ifdef RUN_FROM_RAM
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177 /* Remap the interrupt vectors to RAM if we are are running from RAM. */
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181 /* Set all GPIO to output other than the P0.14 (BSL), and the JTAG pins.
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182 The JTAG pins are left as input as I'm not sure what will happen if the
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183 Wiggler is connected after powerup - not that it would be a good idea to
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185 GPIO_IODIR = ~( mainJTAG_PORT );
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187 /* Setup the PLL to multiply the XTAL input by 4. */
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188 SCB_PLLCFG = ( mainPLL_MUL_4 | mainPLL_DIV_1 );
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190 /* Activate the PLL by turning it on then feeding the correct sequence of
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192 SCB_PLLCON = mainPLL_ENABLE;
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193 SCB_PLLFEED = mainPLL_FEED_BYTE1;
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194 SCB_PLLFEED = mainPLL_FEED_BYTE2;
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196 /* Wait for the PLL to lock... */
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197 while( !( SCB_PLLSTAT & mainPLL_LOCK ) );
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199 /* ...before connecting it using the feed sequence again. */
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200 SCB_PLLCON = mainPLL_CONNECT;
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201 SCB_PLLFEED = mainPLL_FEED_BYTE1;
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202 SCB_PLLFEED = mainPLL_FEED_BYTE2;
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204 /* Setup and turn on the MAM. Three cycle access is used due to the fast
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205 PLL used. It is possible faster overall performance could be obtained by
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206 tuning the MAM and PLL settings. */
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207 MAM_TIM = mainMAM_TIM_3;
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208 MAM_CR = mainMAM_MODE_FULL;
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210 /* Setup the peripheral bus to be the same as the PLL output. */
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211 SCB_VPBDIV = mainBUS_CLK_FULL;
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213 /* Initialise the i2c peripheral. */
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216 /* Initialise the LED's used by the flash tasks. */
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217 vParTestInitialise();
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219 /*-----------------------------------------------------------*/
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221 static void prvMainCheckOtherTasksAreStillRunning( void )
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223 /* Check all the demo tasks (other than the flash tasks) to ensure
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224 that they are all still running, and that none of them have detected
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227 /* This function is called from more than one task. */
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228 if( xAreIntegerMathsTaskStillRunning() != pdTRUE )
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230 lErrorInTask = pdTRUE;
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233 if( xArePollingQueuesStillRunning() != pdTRUE )
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235 lErrorInTask = pdTRUE;
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238 if( xAreSemaphoreTasksStillRunning() != pdTRUE )
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240 lErrorInTask = pdTRUE;
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243 if( xAreDynamicPriorityTasksStillRunning() != pdTRUE )
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245 lErrorInTask = pdTRUE;
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248 if( xAreBlockingQueuesStillRunning() != pdTRUE )
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250 lErrorInTask = pdTRUE;
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253 /*-----------------------------------------------------------*/
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255 void prvToggleOnBoardLED( void )
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257 unsigned portLONG ulState;
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259 ulState = GPIO0_IOPIN;
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260 if( ulState & mainON_BOARD_LED_BIT )
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262 GPIO_IOCLR = mainON_BOARD_LED_BIT;
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266 GPIO_IOSET = mainON_BOARD_LED_BIT;
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269 /*-----------------------------------------------------------*/
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271 static void prvErrorChecks( void *pvParameters )
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273 portTickType xDelay = mainNO_ERROR_DELAY;
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275 /* The parameters are not used. */
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276 ( void ) pvParameters;
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280 /* How long we delay depends on whether an error has been detected
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281 or not. Therefore the flash rate of the on board LED indicates
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282 whether or not an error has occurred. */
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283 vTaskDelay( xDelay );
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285 /* Update the lErrorInTask flag. */
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286 prvMainCheckOtherTasksAreStillRunning();
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290 /* An error has been found so reduce the delay period and in so
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291 doing speed up the flash rate of the on board LED. */
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292 xDelay = mainERROR_DELAY;
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295 prvToggleOnBoardLED();
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