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Starting point for XMC4500 IAR demo application.
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Richard Barry
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Demo/CORTEX_M4F_Infineon_XMC4500_IAR/main.c
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Demo/CORTEX_M4F_Infineon_XMC4500_IAR/main.c
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/*
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FreeRTOS V7.1.0 - Copyright (C) 2011 Real Time Engineers Ltd.
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***************************************************************************
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* *
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* FreeRTOS tutorial books are available in pdf and paperback. *
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* Complete, revised, and edited pdf reference manuals are also *
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* available. *
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* *
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* Purchasing FreeRTOS documentation will not only help you, by *
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* ensuring you get running as quickly as possible and with an *
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* in-depth knowledge of how to use FreeRTOS, it will also help *
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* the FreeRTOS project to continue with its mission of providing *
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* professional grade, cross platform, de facto standard solutions *
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* for microcontrollers - completely free of charge! *
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* *
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* >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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* *
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* Thank you for using FreeRTOS, and thank you for your support! *
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* *
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***************************************************************************
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This file is part of the FreeRTOS distribution.
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FreeRTOS is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License (version 2) as published by the
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Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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>>>NOTE<<< The modification to the GPL is included to allow you to
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distribute a combined work that includes FreeRTOS without being obliged to
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provide the source code for proprietary components outside of the FreeRTOS
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kernel. FreeRTOS is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details. You should have received a copy of the GNU General Public
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License and the FreeRTOS license exception along with FreeRTOS; if not it
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can be viewed here: http://www.freertos.org/a00114.html and also obtained
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by writing to Richard Barry, contact details for whom are available on the
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FreeRTOS WEB site.
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1 tab == 4 spaces!
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http://www.FreeRTOS.org - Documentation, latest information, license and
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contact details.
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http://www.SafeRTOS.com - A version that is certified for use in safety
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critical systems.
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http://www.OpenRTOS.com - Commercial support, development, porting,
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licensing and training services.
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*/
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/******************************************************************************
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* This project provides two demo applications. A simple blinky style project,
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* and a more comprehensive test and demo application. The
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* mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting (defined in this file) is used to
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* select between the two. The simply blinky demo is implemented and described
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* in main_blinky.c. The more comprehensive test and demo application is
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* implemented and described in main_full.c.
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*
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* This file implements the code that is not demo specific, including the
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* hardware setup and FreeRTOS hook functions.
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*
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*
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* Additional code:
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*
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* This demo does not contain a non-kernel interrupt service routine that
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* can be used as an example for application writers to use as a reference.
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* Therefore, the framework of a dummy (not installed) handler is provided
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* in this file. The dummy function is called Dummy_IRQHandler(). Please
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* ensure to read the comments in the function itself, but more importantly,
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* the notes on the function contained on the documentation page for this demo
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* that is found on the FreeRTOS.org web site.
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*/
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/* Standard includes. */
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#include <stdio.h>
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/* Kernel includes. */
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#include "FreeRTOS.h"
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#include "task.h"
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/* Hardware includes. */
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#include "XMC4500.h"
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#include "System_XMC4500.h"
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/* Set mainCREATE_SIMPLE_BLINKY_DEMO_ONLY to one to run the simple blinky demo,
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or 0 to run the more comprehensive test and demo application. */
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#define mainCREATE_SIMPLE_BLINKY_DEMO_ONLY 0
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/*-----------------------------------------------------------*/
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/*
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* Set up the hardware ready to run this demo.
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*/
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static void prvSetupHardware( void );
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/*
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* main_blinky() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 1.
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* main_full() is used when mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 0.
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*/
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extern void main_blinky( void );
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extern void main_full( void );
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/*-----------------------------------------------------------*/
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int main( void )
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{
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/* Prepare the hardware to run this demo. */
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prvSetupHardware();
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/* The mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting is described at the top
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of this file. */
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#if mainCREATE_SIMPLE_BLINKY_DEMO_ONLY == 1
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{
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main_blinky();
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}
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#else
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{
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main_full();
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}
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#endif
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return 0;
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}
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/*-----------------------------------------------------------*/
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static void prvSetupHardware( void )
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{
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extern void SystemCoreClockUpdate( void );
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/* Ensure SystemCoreClock variable is set. */
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SystemCoreClockUpdate();
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/* Configure pin P3.9 for the LED. */
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PORT3->IOCR8 = 0x00008000;
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/* Ensure all priority bits are assigned as preemption priority bits. */
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NVIC_SetPriorityGrouping( 0 );
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}
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/*-----------------------------------------------------------*/
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void vApplicationMallocFailedHook( void )
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{
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/* vApplicationMallocFailedHook() will only be called if
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configUSE_MALLOC_FAILED_HOOK is set to 1 in FreeRTOSConfig.h. It is a hook
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function that will get called if a call to pvPortMalloc() fails.
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pvPortMalloc() is called internally by the kernel whenever a task, queue,
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timer or semaphore is created. It is also called by various parts of the
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demo application. If heap_1.c or heap_2.c are used, then the size of the
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heap available to pvPortMalloc() is defined by configTOTAL_HEAP_SIZE in
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FreeRTOSConfig.h, and the xPortGetFreeHeapSize() API function can be used
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to query the size of free heap space that remains (although it does not
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provide information on how the remaining heap might be fragmented). */
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taskDISABLE_INTERRUPTS();
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for( ;; );
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}
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/*-----------------------------------------------------------*/
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void vApplicationIdleHook( void )
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{
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/* vApplicationIdleHook() will only be called if configUSE_IDLE_HOOK is set
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to 1 in FreeRTOSConfig.h. It will be called on each iteration of the idle
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task. It is essential that code added to this hook function never attempts
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to block in any way (for example, call xQueueReceive() with a block time
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specified, or call vTaskDelay()). If the application makes use of the
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vTaskDelete() API function (as this demo application does) then it is also
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important that vApplicationIdleHook() is permitted to return to its calling
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function, because it is the responsibility of the idle task to clean up
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memory allocated by the kernel to any task that has since been deleted. */
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}
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/*-----------------------------------------------------------*/
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void vApplicationStackOverflowHook( xTaskHandle pxTask, signed char *pcTaskName )
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{
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( void ) pcTaskName;
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( void ) pxTask;
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/* Run time stack overflow checking is performed if
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configCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2. This hook
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function is called if a stack overflow is detected. */
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taskDISABLE_INTERRUPTS();
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for( ;; );
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}
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/*-----------------------------------------------------------*/
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void vApplicationTickHook( void )
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{
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/* This function will be called by each tick interrupt if
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configUSE_TICK_HOOK is set to 1 in FreeRTOSConfig.h. User code can be
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added here, but the tick hook is called from an interrupt context, so
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code must not attempt to block, and only the interrupt safe FreeRTOS API
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functions can be used (those that end in FromISR()). */
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}
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/*-----------------------------------------------------------*/
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#ifdef JUST_AN_EXAMPLE_ISR
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void Dummy_IRQHandler(void)
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{
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long lHigherPriorityTaskWoken = pdFALSE;
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/* Clear the interrupt if necessary. */
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Dummy_ClearITPendingBit();
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/* This interrupt does nothing more than demonstrate how to synchronise a
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task with an interrupt. A semaphore is used for this purpose. Note
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lHigherPriorityTaskWoken is initialised to zero. */
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xSemaphoreGiveFromISR( xTestSemaphore, &lHigherPriorityTaskWoken );
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/* If there was a task that was blocked on the semaphore, and giving the
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semaphore caused the task to unblock, and the unblocked task has a priority
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higher than the current Running state task (the task that this interrupt
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interrupted), then lHigherPriorityTaskWoken will have been set to pdTRUE
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internally within xSemaphoreGiveFromISR(). Passing pdTRUE into the
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portEND_SWITCHING_ISR() macro will result in a context switch being pended to
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ensure this interrupt returns directly to the unblocked, higher priority,
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task. Passing pdFALSE into portEND_SWITCHING_ISR() has no effect. */
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portEND_SWITCHING_ISR( lHigherPriorityTaskWoken );
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}
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#endif /* JUST_AN_EXAMPLE_ISR */
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