2 FreeRTOS V7.5.2 - Copyright (C) 2013 Real Time Engineers Ltd.
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4 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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6 ***************************************************************************
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8 * FreeRTOS provides completely free yet professionally developed, *
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9 * robust, strictly quality controlled, supported, and cross *
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10 * platform software that has become a de facto standard. *
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12 * Help yourself get started quickly and support the FreeRTOS *
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13 * project by purchasing a FreeRTOS tutorial book, reference *
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14 * manual, or both from: http://www.FreeRTOS.org/Documentation *
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18 ***************************************************************************
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20 This file is part of the FreeRTOS distribution.
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22 FreeRTOS is free software; you can redistribute it and/or modify it under
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23 the terms of the GNU General Public License (version 2) as published by the
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24 Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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26 >>! NOTE: The modification to the GPL is included to allow you to distribute
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27 >>! a combined work that includes FreeRTOS without being obliged to provide
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28 >>! the source code for proprietary components outside of the FreeRTOS
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31 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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32 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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33 FOR A PARTICULAR PURPOSE. Full license text is available from the following
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34 link: http://www.freertos.org/a00114.html
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38 ***************************************************************************
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40 * Having a problem? Start by reading the FAQ "My application does *
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41 * not run, what could be wrong?" *
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43 * http://www.FreeRTOS.org/FAQHelp.html *
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45 ***************************************************************************
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47 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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48 license and Real Time Engineers Ltd. contact details.
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50 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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51 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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52 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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54 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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55 Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
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56 licenses offer ticketed support, indemnification and middleware.
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58 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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59 engineered and independently SIL3 certified version for use in safety and
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60 mission critical applications that require provable dependability.
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65 /******************************************************************************
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66 * This project provides two demo applications. A simple blinky style project,
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67 * and a more comprehensive test and demo application. The
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68 * mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting (defined in this file) is used to
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69 * select between the two. The simply blinky demo is implemented and described
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70 * in main_blinky.c. The more comprehensive test and demo application is
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71 * implemented and described in main_full.c.
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73 * This file implements the code that is not demo specific, including the
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74 * hardware setup and FreeRTOS hook functions. It also contains a dummy
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75 * interrupt service routine called Dummy_IRQHandler() that is provided as an
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76 * example of how to use interrupt safe FreeRTOS API functions (those that end
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79 *****************************************************************************/
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82 /* Standard includes. */
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85 /* FreeRTOS includes. */
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86 #include "FreeRTOS.h"
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90 /* Demo application include. */
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91 #include "ParTest.h"
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92 #include "QueueSet.h"
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94 /* Set mainCREATE_SIMPLE_BLINKY_DEMO_ONLY to one to run the simple blinky demo,
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95 or 0 to run the more comprehensive test and demo application. */
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96 #define mainCREATE_SIMPLE_BLINKY_DEMO_ONLY 1
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99 /*-----------------------------------------------------------*/
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102 * Perform any application specific hardware configuration. The clocks,
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103 * memory, etc. are configured before main() is called.
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105 static void prvSetupHardware( void );
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108 * main_blinky() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 1.
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109 * main_full() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 0.
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111 extern void main_blinky( void );
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112 extern void main_full( void );
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115 * CMSIS clock configuration function.
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117 extern void SystemCoreClockUpdate( void );
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119 /*-----------------------------------------------------------*/
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123 /* Prepare the hardware to run this demo. */
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124 prvSetupHardware();
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126 /* The mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting is described at the top
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128 #if mainCREATE_SIMPLE_BLINKY_DEMO_ONLY == 1
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140 /*-----------------------------------------------------------*/
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142 static void prvSetupHardware( void )
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144 SystemCoreClockUpdate();
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145 vParTestInitialise();
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147 /*-----------------------------------------------------------*/
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149 void vApplicationMallocFailedHook( void )
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151 /* vApplicationMallocFailedHook() will only be called if
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152 configUSE_MALLOC_FAILED_HOOK is set to 1 in FreeRTOSConfig.h. It is a hook
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153 function that will get called if a call to pvPortMalloc() fails.
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154 pvPortMalloc() is called internally by the kernel whenever a task, queue,
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155 timer or semaphore is created. It is also called by various parts of the
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156 demo application. If heap_1.c or heap_2.c are used, then the size of the
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157 heap available to pvPortMalloc() is defined by configTOTAL_HEAP_SIZE in
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158 FreeRTOSConfig.h, and the xPortGetFreeHeapSize() API function can be used
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159 to query the size of free heap space that remains (although it does not
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160 provide information on how the remaining heap might be fragmented). */
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161 taskDISABLE_INTERRUPTS();
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164 /*-----------------------------------------------------------*/
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166 void vApplicationIdleHook( void )
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168 /* vApplicationIdleHook() will only be called if configUSE_IDLE_HOOK is set
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169 to 1 in FreeRTOSConfig.h. It will be called on each iteration of the idle
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170 task. It is essential that code added to this hook function never attempts
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171 to block in any way (for example, call xQueueReceive() with a block time
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172 specified, or call vTaskDelay()). If the application makes use of the
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173 vTaskDelete() API function (as this demo application does) then it is also
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174 important that vApplicationIdleHook() is permitted to return to its calling
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175 function, because it is the responsibility of the idle task to clean up
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176 memory allocated by the kernel to any task that has since been deleted. */
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178 /*-----------------------------------------------------------*/
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180 void vApplicationStackOverflowHook( xTaskHandle pxTask, signed char *pcTaskName )
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182 ( void ) pcTaskName;
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185 /* Run time stack overflow checking is performed if
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186 configCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2. This hook
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187 function is called if a stack overflow is detected. */
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188 taskDISABLE_INTERRUPTS();
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191 /*-----------------------------------------------------------*/
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193 void vApplicationTickHook( void )
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195 /* This function will be called by each tick interrupt if
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196 configUSE_TICK_HOOK is set to 1 in FreeRTOSConfig.h. User code can be
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197 added here, but the tick hook is called from an interrupt context, so
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198 code must not attempt to block, and only the interrupt safe FreeRTOS API
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199 functions can be used (those that end in FromISR()). The code in this
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200 tick hook implementation is for demonstration only - it has no real
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201 purpose. It just gives a semaphore every 50ms. The semaphore unblocks a
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202 task that then toggles an LED. Additionally, the call to
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203 vQueueSetAccessQueueSetFromISR() is part of the "standard demo tasks"
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206 /* The semaphore and associated task are not created when the simple blinky
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208 #if mainCREATE_SIMPLE_BLINKY_DEMO_ONLY == 0
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210 static unsigned long ulLastGiveTime = 0UL;
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211 const unsigned long ulRate = 50UL / portTICK_RATE_MS;
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212 extern xSemaphoreHandle xLEDSemaphore;
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214 configASSERT( xLEDSemaphore );
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216 if( ( xTaskGetTickCountFromISR() - ulLastGiveTime ) > ulRate )
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218 /* The second parameter is normally used to determine if a context
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219 switch should be performed or not. In this case the function is
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220 being performed from the tick hook, so the scheduler will make that
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221 assessment before returning to a task anyway - so the parameter is
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222 not needed and is just set to NULL. */
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223 xSemaphoreGiveFromISR( xLEDSemaphore, NULL );
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224 ulLastGiveTime += ulRate;
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227 /* Write to a queue that is in use as part of the queue set demo to
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228 demonstrate using queue sets from an ISR. */
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229 vQueueSetAccessQueueSetFromISR();
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231 #endif /* mainCREATE_SIMPLE_BLINKY_DEMO_ONLY */
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233 /*-----------------------------------------------------------*/
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235 #ifdef JUST_AN_EXAMPLE_ISR
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237 void Dummy_IRQHandler(void)
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239 long lHigherPriorityTaskWoken = pdFALSE;
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241 /* Clear the interrupt if necessary. */
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242 Dummy_ClearITPendingBit();
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244 /* This interrupt does nothing more than demonstrate how to synchronise a
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245 task with an interrupt. A semaphore is used for this purpose. Note
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246 lHigherPriorityTaskWoken is initialised to zero. Only FreeRTOS API functions
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247 that end in "FromISR" can be called from an ISR. */
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248 xSemaphoreGiveFromISR( xTestSemaphore, &lHigherPriorityTaskWoken );
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250 /* If there was a task that was blocked on the semaphore, and giving the
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251 semaphore caused the task to unblock, and the unblocked task has a priority
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252 higher than the current Running state task (the task that this interrupt
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253 interrupted), then lHigherPriorityTaskWoken will have been set to pdTRUE
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254 internally within xSemaphoreGiveFromISR(). Passing pdTRUE into the
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255 portEND_SWITCHING_ISR() macro will result in a context switch being pended to
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256 ensure this interrupt returns directly to the unblocked, higher priority,
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257 task. Passing pdFALSE into portEND_SWITCHING_ISR() has no effect. */
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258 portEND_SWITCHING_ISR( lHigherPriorityTaskWoken );
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261 #endif /* JUST_AN_EXAMPLE_ISR */
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