2 FreeRTOS V8.2.0rc1 - Copyright (C) 2014 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 >>! NOTE: The modification to the GPL is included to allow you to !<<
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14 >>! distribute a combined work that includes FreeRTOS without being !<<
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15 >>! obliged to provide the source code for proprietary components !<<
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16 >>! outside of the FreeRTOS kernel. !<<
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18 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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19 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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20 FOR A PARTICULAR PURPOSE. Full license text is available on the following
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21 link: http://www.freertos.org/a00114.html
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25 ***************************************************************************
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27 * Having a problem? Start by reading the FAQ "My application does *
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28 * not run, what could be wrong?". Have you defined configASSERT()? *
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30 * http://www.FreeRTOS.org/FAQHelp.html *
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32 ***************************************************************************
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34 ***************************************************************************
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36 * FreeRTOS provides completely free yet professionally developed, *
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37 * robust, strictly quality controlled, supported, and cross *
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38 * platform software that is more than just the market leader, it *
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39 * is the industry's de facto standard. *
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41 * Help yourself get started quickly while simultaneously helping *
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42 * to support the FreeRTOS project by purchasing a FreeRTOS *
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43 * tutorial book, reference manual, or both: *
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44 * http://www.FreeRTOS.org/Documentation *
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46 ***************************************************************************
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48 ***************************************************************************
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50 * Investing in training allows your team to be as productive as *
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51 * possible as early as possible, lowering your overall development *
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52 * cost, and enabling you to bring a more robust product to market *
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53 * earlier than would otherwise be possible. Richard Barry is both *
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54 * the architect and key author of FreeRTOS, and so also the world's *
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55 * leading authority on what is the world's most popular real time *
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56 * kernel for deeply embedded MCU designs. Obtaining your training *
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57 * from Richard ensures your team will gain directly from his in-depth *
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58 * product knowledge and years of usage experience. Contact Real Time *
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59 * Engineers Ltd to enquire about the FreeRTOS Masterclass, presented *
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60 * by Richard Barry: http://www.FreeRTOS.org/contact
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62 ***************************************************************************
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64 ***************************************************************************
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66 * You are receiving this top quality software for free. Please play *
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67 * fair and reciprocate by reporting any suspected issues and *
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68 * participating in the community forum: *
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69 * http://www.FreeRTOS.org/support *
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73 ***************************************************************************
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75 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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76 license and Real Time Engineers Ltd. contact details.
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78 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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79 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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80 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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82 http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
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83 Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
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85 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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86 Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
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87 licenses offer ticketed support, indemnification and commercial middleware.
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89 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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90 engineered and independently SIL3 certified version for use in safety and
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91 mission critical applications that require provable dependability.
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96 /******************************************************************************
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97 * This project provides two demo applications. A low power project that
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98 * demonstrates the FreeRTOS tickless mode, and a more comprehensive test and
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99 * demo application. The configCREATE_LOW_POWER_DEMO setting (defined at the
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100 * top of FreeRTOSConfig.h) is used to select between the two. The low power
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101 * demo is implemented and described in main_low_power.c. The more
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102 * comprehensive test and demo application is implemented and described in
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105 * This file implements the code that is not demo specific, including the
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106 * hardware setup and FreeRTOS hook functions.
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109 /* Kernel includes. */
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110 #include "FreeRTOS.h"
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113 /* ST library functions. */
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114 #include "stm32l1xx.h"
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115 #include "discover_board.h"
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117 /*-----------------------------------------------------------*/
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120 * Set up the hardware ready to run this demo.
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122 static void prvSetupHardware( void );
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125 * main_low_power() is used when configCREATE_LOW_POWER_DEMO is set to 1.
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126 * main_full() is used when configCREATE_LOW_POWER_DEMO is set to 0.
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127 * configCREATE_LOW_POWER_DEMO is defined at the top of main.c.
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129 extern void main_low_power( void );
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130 extern void main_full( void );
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132 /* Prototypes for the standard FreeRTOS callback/hook functions implemented
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133 within this file. */
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134 void vApplicationMallocFailedHook( void );
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135 void vApplicationIdleHook( void );
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136 void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName );
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137 void vApplicationTickHook( void );
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139 /*-----------------------------------------------------------*/
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143 /* Prepare the hardware to run this demo. */
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144 prvSetupHardware();
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146 /* The configCREATE_LOW_POWER_DEMO setting is described at the top of
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148 #if configCREATE_LOW_POWER_DEMO == 1
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158 /* This line will never be reached. */
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161 /*-----------------------------------------------------------*/
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163 static void prvSetupHardware( void )
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165 /* GPIO, EXTI and NVIC Init structure declaration */
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166 GPIO_InitTypeDef GPIO_InitStructure;
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167 EXTI_InitTypeDef EXTI_InitStructure;
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168 NVIC_InitTypeDef NVIC_InitStructure;
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169 void SystemCoreClockUpdate( void );
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171 /* System function that updates the SystemCoreClock variable. */
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172 SystemCoreClockUpdate();
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174 /* Essential on STM32 Cortex-M devices. */
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175 NVIC_PriorityGroupConfig( NVIC_PriorityGroup_4 );
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177 /* Systick is fed from HCLK/8. */
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178 SysTick_CLKSourceConfig( SysTick_CLKSource_HCLK_Div8 );
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180 /* Set MSI clock range to ~4.194MHz. */
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181 RCC_MSIRangeConfig( RCC_MSIRange_6 );
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183 /* Enable the GPIOs clocks. */
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184 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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186 /* Enable comparator clocks. */
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187 RCC_APB1PeriphClockCmd( RCC_APB1Periph_COMP, ENABLE );
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189 /* Enable SYSCFG clocks. */
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190 RCC_APB2PeriphClockCmd( RCC_APB2Periph_SYSCFG , ENABLE );
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192 /* Set internal voltage regulator to 1.5V. */
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193 PWR_VoltageScalingConfig( PWR_VoltageScaling_Range2 );
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195 /* Wait Until the Voltage Regulator is ready. */
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196 while( PWR_GetFlagStatus( PWR_FLAG_VOS ) != RESET );
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198 /* Configure User Button pin as input */
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199 GPIO_InitStructure.GPIO_Pin = USERBUTTON_GPIO_PIN;
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200 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
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201 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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202 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz;
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203 GPIO_Init( USERBUTTON_GPIO_PORT, &GPIO_InitStructure );
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205 /* Select User Button pin as input source for EXTI Line */
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206 SYSCFG_EXTILineConfig( EXTI_PortSourceGPIOA, EXTI_PinSource0 );
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208 /* Configure EXT1 Line 0 in interrupt mode trigged on Rising edge */
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209 EXTI_InitStructure.EXTI_Line = EXTI_Line0 ; /* PA0 for User button AND IDD_WakeUP */
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210 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
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211 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
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212 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
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213 EXTI_Init( &EXTI_InitStructure );
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215 /* Enable and set EXTI0 Interrupt to the lowest priority */
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216 NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
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217 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = configLIBRARY_LOWEST_INTERRUPT_PRIORITY;
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218 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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219 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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220 NVIC_Init( &NVIC_InitStructure );
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222 /* Configure the LED_pin as output push-pull for LD3 & LD4 usage */
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223 GPIO_InitStructure.GPIO_Pin = LD_GREEN_GPIO_PIN | LD_BLUE_GPIO_PIN;
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224 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
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225 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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226 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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227 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
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228 GPIO_Init( LD_GPIO_PORT, &GPIO_InitStructure );
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230 /* Force a low level on LEDs */
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231 GPIO_LOW( LD_GPIO_PORT, LD_GREEN_GPIO_PIN );
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232 GPIO_LOW( LD_GPIO_PORT, LD_BLUE_GPIO_PIN );
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234 /*-----------------------------------------------------------*/
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236 void vApplicationMallocFailedHook( void )
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238 /* vApplicationMallocFailedHook() will only be called if
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239 configUSE_MALLOC_FAILED_HOOK is set to 1 in FreeRTOSConfig.h. It is a hook
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240 function that will get called if a call to pvPortMalloc() fails.
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241 pvPortMalloc() is called internally by the kernel whenever a task, queue,
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242 timer or semaphore is created. It is also called by various parts of the
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243 demo application. If heap_1.c or heap_2.c are used, then the size of the
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244 heap available to pvPortMalloc() is defined by configTOTAL_HEAP_SIZE in
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245 FreeRTOSConfig.h, and the xPortGetFreeHeapSize() API function can be used
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246 to query the size of free heap space that remains (although it does not
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247 provide information on how the remaining heap might be fragmented). */
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248 taskDISABLE_INTERRUPTS();
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251 /*-----------------------------------------------------------*/
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253 void vApplicationIdleHook( void )
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255 /* vApplicationIdleHook() will only be called if configUSE_IDLE_HOOK is set
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256 to 1 in FreeRTOSConfig.h. It will be called on each iteration of the idle
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257 task. It is essential that code added to this hook function never attempts
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258 to block in any way (for example, call xQueueReceive() with a block time
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259 specified, or call vTaskDelay()). If the application makes use of the
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260 vTaskDelete() API function (as this demo application does) then it is also
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261 important that vApplicationIdleHook() is permitted to return to its calling
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262 function, because it is the responsibility of the idle task to clean up
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263 memory allocated by the kernel to any task that has since been deleted. */
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265 /*-----------------------------------------------------------*/
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267 void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName )
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269 ( void ) pcTaskName;
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272 /* Run time stack overflow checking is performed if
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273 configCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2. This hook
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274 function is called if a stack overflow is detected. */
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275 taskDISABLE_INTERRUPTS();
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278 /*-----------------------------------------------------------*/
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280 void vApplicationTickHook( void )
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282 /* This function will be called by each tick interrupt if
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283 configUSE_TICK_HOOK is set to 1 in FreeRTOSConfig.h. User code can be
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284 added here, but the tick hook is called from an interrupt context, so
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285 code must not attempt to block, and only the interrupt safe FreeRTOS API
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286 functions can be used (those that end in FromISR()). */
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288 /*-----------------------------------------------------------*/
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290 void vAssertCalled( unsigned long ulLine, const char * const pcFileName )
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292 volatile unsigned long ulSetToNonZeroInDebuggerToContinue = 0;
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294 /* Parameters are not used. */
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296 ( void ) pcFileName;
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298 taskENTER_CRITICAL();
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300 while( ulSetToNonZeroInDebuggerToContinue == 0 )
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302 /* Use the debugger to set ulSetToNonZeroInDebuggerToContinue to a
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303 non zero value to step out of this function to the point that raised
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305 __asm volatile( "NOP" );
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306 __asm volatile( "NOP" );
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309 taskEXIT_CRITICAL();
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