2 FreeRTOS V7.1.1 - Copyright (C) 2012 Real Time Engineers Ltd.
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5 ***************************************************************************
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7 * FreeRTOS tutorial books are available in pdf and paperback. *
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8 * Complete, revised, and edited pdf reference manuals are also *
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11 * Purchasing FreeRTOS documentation will not only help you, by *
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12 * ensuring you get running as quickly as possible and with an *
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13 * in-depth knowledge of how to use FreeRTOS, it will also help *
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14 * the FreeRTOS project to continue with its mission of providing *
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15 * professional grade, cross platform, de facto standard solutions *
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16 * for microcontrollers - completely free of charge! *
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18 * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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20 * Thank you for using FreeRTOS, and thank you for your support! *
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22 ***************************************************************************
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25 This file is part of the FreeRTOS distribution.
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27 FreeRTOS is free software; you can redistribute it and/or modify it under
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28 the terms of the GNU General Public License (version 2) as published by the
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29 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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30 >>>NOTE<<< The modification to the GPL is included to allow you to
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31 distribute a combined work that includes FreeRTOS without being obliged to
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32 provide the source code for proprietary components outside of the FreeRTOS
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33 kernel. FreeRTOS is distributed in the hope that it will be useful, but
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34 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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35 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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36 more details. You should have received a copy of the GNU General Public
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37 License and the FreeRTOS license exception along with FreeRTOS; if not it
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38 can be viewed here: http://www.freertos.org/a00114.html and also obtained
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39 by writing to Richard Barry, contact details for whom are available on the
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44 ***************************************************************************
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46 * Having a problem? Start by reading the FAQ "My application does *
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47 * not run, what could be wrong? *
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49 * http://www.FreeRTOS.org/FAQHelp.html *
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51 ***************************************************************************
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54 http://www.FreeRTOS.org - Documentation, training, latest information,
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55 license and contact details.
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57 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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58 including FreeRTOS+Trace - an indispensable productivity tool.
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60 Real Time Engineers ltd license FreeRTOS to High Integrity Systems, who sell
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61 the code with commercial support, indemnification, and middleware, under
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62 the OpenRTOS brand: http://www.OpenRTOS.com. High Integrity Systems also
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63 provide a safety engineered and independently SIL3 certified version under
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64 the SafeRTOS brand: http://www.SafeRTOS.com.
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67 /******************************************************************************
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68 * This project provides two demo applications. A simple blinky style project,
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69 * and a more comprehensive test and demo application. The
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70 * mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting (defined in this file) is used to
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71 * select between the two. The simply blinky demo is implemented and described
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72 * in main_blinky.c. The more comprehensive test and demo application is
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73 * implemented and described in main_full.c.
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75 * This file implements the code that is not demo specific, including the
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76 * hardware setup and FreeRTOS hook functions.
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81 * This demo does not contain a non-kernel interrupt service routine that
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82 * can be used as an example for application writers to use as a reference.
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83 * Therefore, the framework of a dummy (not installed) handler is provided
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84 * in this file. The dummy function is called Dummy_IRQHandler(). Please
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85 * ensure to read the comments in the function itself, but more importantly,
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86 * the notes on the function contained on the documentation page for this demo
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87 * that is found on the FreeRTOS.org web site.
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90 /* Standard includes. */
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93 /* Kernel includes. */
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94 #include "FreeRTOS.h"
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97 /* Hardware includes. */
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98 #include "XMC4500.h"
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99 #include "System_XMC4500.h"
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101 /* Set mainCREATE_SIMPLE_BLINKY_DEMO_ONLY to one to run the simple blinky demo,
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102 or 0 to run the more comprehensive test and demo application. */
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103 #define mainCREATE_SIMPLE_BLINKY_DEMO_ONLY 0
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105 /*-----------------------------------------------------------*/
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108 * Set up the hardware ready to run this demo.
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110 static void prvSetupHardware( void );
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113 * main_blinky() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 1.
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114 * main_full() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 0.
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116 extern void main_blinky( void );
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117 extern void main_full( 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 extern void SystemCoreClockUpdate( void );
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146 /* Ensure SystemCoreClock variable is set. */
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147 SystemCoreClockUpdate();
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149 /* Configure pin P3.9 for the LED. */
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150 PORT3->IOCR8 = 0x00008000;
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152 /* Ensure all priority bits are assigned as preemption priority bits. */
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153 NVIC_SetPriorityGrouping( 0 );
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155 /*-----------------------------------------------------------*/
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157 void vApplicationMallocFailedHook( void )
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159 /* vApplicationMallocFailedHook() will only be called if
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160 configUSE_MALLOC_FAILED_HOOK is set to 1 in FreeRTOSConfig.h. It is a hook
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161 function that will get called if a call to pvPortMalloc() fails.
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162 pvPortMalloc() is called internally by the kernel whenever a task, queue,
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163 timer or semaphore is created. It is also called by various parts of the
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164 demo application. If heap_1.c or heap_2.c are used, then the size of the
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165 heap available to pvPortMalloc() is defined by configTOTAL_HEAP_SIZE in
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166 FreeRTOSConfig.h, and the xPortGetFreeHeapSize() API function can be used
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167 to query the size of free heap space that remains (although it does not
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168 provide information on how the remaining heap might be fragmented). */
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169 taskDISABLE_INTERRUPTS();
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172 /*-----------------------------------------------------------*/
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174 void vApplicationIdleHook( void )
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176 /* vApplicationIdleHook() will only be called if configUSE_IDLE_HOOK is set
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177 to 1 in FreeRTOSConfig.h. It will be called on each iteration of the idle
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178 task. It is essential that code added to this hook function never attempts
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179 to block in any way (for example, call xQueueReceive() with a block time
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180 specified, or call vTaskDelay()). If the application makes use of the
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181 vTaskDelete() API function (as this demo application does) then it is also
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182 important that vApplicationIdleHook() is permitted to return to its calling
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183 function, because it is the responsibility of the idle task to clean up
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184 memory allocated by the kernel to any task that has since been deleted. */
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186 /*-----------------------------------------------------------*/
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188 void vApplicationStackOverflowHook( xTaskHandle pxTask, signed char *pcTaskName )
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190 ( void ) pcTaskName;
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193 /* Run time stack overflow checking is performed if
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194 configCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2. This hook
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195 function is called if a stack overflow is detected. */
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196 taskDISABLE_INTERRUPTS();
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199 /*-----------------------------------------------------------*/
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201 void vApplicationTickHook( void )
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203 /* This function will be called by each tick interrupt if
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204 configUSE_TICK_HOOK is set to 1 in FreeRTOSConfig.h. User code can be
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205 added here, but the tick hook is called from an interrupt context, so
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206 code must not attempt to block, and only the interrupt safe FreeRTOS API
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207 functions can be used (those that end in FromISR()). */
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209 /*-----------------------------------------------------------*/
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211 #ifdef JUST_AN_EXAMPLE_ISR
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213 void Dummy_IRQHandler(void)
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215 long lHigherPriorityTaskWoken = pdFALSE;
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217 /* Clear the interrupt if necessary. */
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218 Dummy_ClearITPendingBit();
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220 /* This interrupt does nothing more than demonstrate how to synchronise a
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221 task with an interrupt. A semaphore is used for this purpose. Note
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222 lHigherPriorityTaskWoken is initialised to zero. */
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223 xSemaphoreGiveFromISR( xTestSemaphore, &lHigherPriorityTaskWoken );
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225 /* If there was a task that was blocked on the semaphore, and giving the
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226 semaphore caused the task to unblock, and the unblocked task has a priority
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227 higher than the current Running state task (the task that this interrupt
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228 interrupted), then lHigherPriorityTaskWoken will have been set to pdTRUE
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229 internally within xSemaphoreGiveFromISR(). Passing pdTRUE into the
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230 portEND_SWITCHING_ISR() macro will result in a context switch being pended to
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231 ensure this interrupt returns directly to the unblocked, higher priority,
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232 task. Passing pdFALSE into portEND_SWITCHING_ISR() has no effect. */
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233 portEND_SWITCHING_ISR( lHigherPriorityTaskWoken );
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236 #endif /* JUST_AN_EXAMPLE_ISR */
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