2 FreeRTOS V8.2.1 - Copyright (C) 2015 Real Time Engineers Ltd.
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5 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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7 This file is part of the FreeRTOS distribution.
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9 FreeRTOS is free software; you can redistribute it and/or modify it under
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10 the terms of the GNU General Public License (version 2) as published by the
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11 Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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13 ***************************************************************************
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14 >>! NOTE: The modification to the GPL is included to allow you to !<<
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15 >>! distribute a combined work that includes FreeRTOS without being !<<
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16 >>! obliged to provide the source code for proprietary components !<<
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17 >>! outside of the FreeRTOS kernel. !<<
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18 ***************************************************************************
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20 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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21 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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22 FOR A PARTICULAR PURPOSE. Full license text is available on the following
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23 link: http://www.freertos.org/a00114.html
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25 ***************************************************************************
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27 * FreeRTOS provides completely free yet professionally developed, *
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28 * robust, strictly quality controlled, supported, and cross *
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29 * platform software that is more than just the market leader, it *
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30 * is the industry's de facto standard. *
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32 * Help yourself get started quickly while simultaneously helping *
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33 * to support the FreeRTOS project by purchasing a FreeRTOS *
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34 * tutorial book, reference manual, or both: *
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35 * http://www.FreeRTOS.org/Documentation *
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37 ***************************************************************************
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39 http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
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40 the FAQ page "My application does not run, what could be wrong?". Have you
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41 defined configASSERT()?
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43 http://www.FreeRTOS.org/support - In return for receiving this top quality
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44 embedded software for free we request you assist our global community by
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45 participating in the support forum.
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47 http://www.FreeRTOS.org/training - Investing in training allows your team to
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48 be as productive as possible as early as possible. Now you can receive
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49 FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
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50 Ltd, and the world's leading authority on the world's leading RTOS.
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52 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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53 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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54 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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56 http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
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57 Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
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59 http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
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60 Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
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61 licenses offer ticketed support, indemnification and commercial middleware.
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63 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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64 engineered and independently SIL3 certified version for use in safety and
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65 mission critical applications that require provable dependability.
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70 /******************************************************************************
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71 * This project provides two demo applications. A low power project that
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72 * demonstrates the FreeRTOS tickless mode, and a more comprehensive test and
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73 * demo application. The configCREATE_LOW_POWER_DEMO setting (defined at the
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74 * top of FreeRTOSConfig.h) is used to select between the two. The low power
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75 * demo is implemented and described in main_low_power.c. The more
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76 * comprehensive test and demo application is implemented and described in
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79 * This file implements the code that is not demo specific, including the
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80 * hardware setup and FreeRTOS hook functions.
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83 /* Kernel includes. */
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84 #include "FreeRTOS.h"
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87 /* ST library functions. */
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88 #include "stm32l1xx.h"
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89 #include "discover_board.h"
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91 /*-----------------------------------------------------------*/
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94 * Set up the hardware ready to run this demo.
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96 static void prvSetupHardware( void );
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99 * main_low_power() is used when configCREATE_LOW_POWER_DEMO is set to 1.
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100 * main_full() is used when configCREATE_LOW_POWER_DEMO is set to 0.
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101 * configCREATE_LOW_POWER_DEMO is defined at the top of main.c.
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103 extern void main_low_power( void );
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104 extern void main_full( void );
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106 /* Prototypes for the standard FreeRTOS callback/hook functions implemented
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107 within this file. */
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108 void vApplicationMallocFailedHook( void );
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109 void vApplicationIdleHook( void );
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110 void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName );
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111 void vApplicationTickHook( void );
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113 /*-----------------------------------------------------------*/
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117 /* Prepare the hardware to run this demo. */
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118 prvSetupHardware();
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120 /* The configCREATE_LOW_POWER_DEMO setting is described at the top of
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122 #if configCREATE_LOW_POWER_DEMO == 1
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132 /* This line will never be reached. */
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135 /*-----------------------------------------------------------*/
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137 static void prvSetupHardware( void )
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139 /* GPIO, EXTI and NVIC Init structure declaration */
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140 GPIO_InitTypeDef GPIO_InitStructure;
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141 EXTI_InitTypeDef EXTI_InitStructure;
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142 NVIC_InitTypeDef NVIC_InitStructure;
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143 void SystemCoreClockUpdate( void );
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145 /* System function that updates the SystemCoreClock variable. */
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146 SystemCoreClockUpdate();
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148 /* Essential on STM32 Cortex-M devices. */
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149 NVIC_PriorityGroupConfig( NVIC_PriorityGroup_4 );
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151 /* Systick is fed from HCLK/8. */
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152 SysTick_CLKSourceConfig( SysTick_CLKSource_HCLK_Div8 );
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154 /* Set MSI clock range to ~4.194MHz. */
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155 RCC_MSIRangeConfig( RCC_MSIRange_6 );
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157 /* Enable the GPIOs clocks. */
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158 RCC_AHBPeriphClockCmd( RCC_AHBPeriph_GPIOA | RCC_AHBPeriph_GPIOB | RCC_AHBPeriph_GPIOC| RCC_AHBPeriph_GPIOD| RCC_AHBPeriph_GPIOE| RCC_AHBPeriph_GPIOH, ENABLE );
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160 /* Enable comparator clocks. */
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161 RCC_APB1PeriphClockCmd( RCC_APB1Periph_COMP, ENABLE );
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163 /* Enable SYSCFG clocks. */
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164 RCC_APB2PeriphClockCmd( RCC_APB2Periph_SYSCFG , ENABLE );
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166 /* Set internal voltage regulator to 1.5V. */
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167 PWR_VoltageScalingConfig( PWR_VoltageScaling_Range2 );
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169 /* Wait Until the Voltage Regulator is ready. */
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170 while( PWR_GetFlagStatus( PWR_FLAG_VOS ) != RESET );
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172 /* Configure User Button pin as input */
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173 GPIO_InitStructure.GPIO_Pin = USERBUTTON_GPIO_PIN;
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174 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
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175 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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176 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
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177 GPIO_Init( USERBUTTON_GPIO_PORT, &GPIO_InitStructure );
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179 /* Select User Button pin as input source for EXTI Line */
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180 SYSCFG_EXTILineConfig( EXTI_PortSourceGPIOA, EXTI_PinSource0 );
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182 /* Configure EXT1 Line 0 in interrupt mode trigged on Rising edge */
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183 EXTI_InitStructure.EXTI_Line = EXTI_Line0 ; /* PA0 for User button AND IDD_WakeUP */
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184 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
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185 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
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186 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
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187 EXTI_Init( &EXTI_InitStructure );
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189 /* Enable and set EXTI0 Interrupt to the lowest priority */
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190 NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
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191 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = configLIBRARY_LOWEST_INTERRUPT_PRIORITY;
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192 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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193 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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194 NVIC_Init( &NVIC_InitStructure );
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196 /* Configure the LED_pin as output push-pull for LD3 & LD4 usage */
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197 GPIO_InitStructure.GPIO_Pin = LD_GREEN_GPIO_PIN | LD_BLUE_GPIO_PIN;
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198 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
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199 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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200 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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201 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
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202 GPIO_Init( LD_GPIO_PORT, &GPIO_InitStructure );
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204 /* Force a low level on LEDs */
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205 GPIO_LOW( LD_GPIO_PORT, LD_GREEN_GPIO_PIN );
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206 GPIO_LOW( LD_GPIO_PORT, LD_BLUE_GPIO_PIN );
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208 /*-----------------------------------------------------------*/
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210 void vApplicationMallocFailedHook( void )
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212 /* vApplicationMallocFailedHook() will only be called if
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213 configUSE_MALLOC_FAILED_HOOK is set to 1 in FreeRTOSConfig.h. It is a hook
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214 function that will get called if a call to pvPortMalloc() fails.
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215 pvPortMalloc() is called internally by the kernel whenever a task, queue,
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216 timer or semaphore is created. It is also called by various parts of the
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217 demo application. If heap_1.c or heap_2.c are used, then the size of the
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218 heap available to pvPortMalloc() is defined by configTOTAL_HEAP_SIZE in
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219 FreeRTOSConfig.h, and the xPortGetFreeHeapSize() API function can be used
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220 to query the size of free heap space that remains (although it does not
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221 provide information on how the remaining heap might be fragmented). */
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222 taskDISABLE_INTERRUPTS();
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225 /*-----------------------------------------------------------*/
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227 void vApplicationIdleHook( void )
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229 /* vApplicationIdleHook() will only be called if configUSE_IDLE_HOOK is set
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230 to 1 in FreeRTOSConfig.h. It will be called on each iteration of the idle
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231 task. It is essential that code added to this hook function never attempts
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232 to block in any way (for example, call xQueueReceive() with a block time
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233 specified, or call vTaskDelay()). If the application makes use of the
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234 vTaskDelete() API function (as this demo application does) then it is also
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235 important that vApplicationIdleHook() is permitted to return to its calling
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236 function, because it is the responsibility of the idle task to clean up
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237 memory allocated by the kernel to any task that has since been deleted. */
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239 /*-----------------------------------------------------------*/
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241 void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName )
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243 ( void ) pcTaskName;
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246 /* Run time stack overflow checking is performed if
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247 configCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2. This hook
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248 function is called if a stack overflow is detected. */
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249 taskDISABLE_INTERRUPTS();
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252 /*-----------------------------------------------------------*/
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254 void vApplicationTickHook( void )
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256 /* This function will be called by each tick interrupt if
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257 configUSE_TICK_HOOK is set to 1 in FreeRTOSConfig.h. User code can be
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258 added here, but the tick hook is called from an interrupt context, so
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259 code must not attempt to block, and only the interrupt safe FreeRTOS API
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260 functions can be used (those that end in FromISR()). */
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262 /*-----------------------------------------------------------*/
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264 void vAssertCalled( unsigned long ulLine, const char * const pcFileName )
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266 volatile unsigned long ulSetToNonZeroInDebuggerToContinue = 0;
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268 /* Parameters are not used. */
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270 ( void ) pcFileName;
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272 taskENTER_CRITICAL();
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274 while( ulSetToNonZeroInDebuggerToContinue == 0 )
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276 /* Use the debugger to set ulSetToNonZeroInDebuggerToContinue to a
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277 non zero value to step out of this function to the point that raised
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279 __asm volatile( "NOP" );
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280 __asm volatile( "NOP" );
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283 taskEXIT_CRITICAL();
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