2 FreeRTOS V8.1.2 - 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 ***************************************************************************
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9 * FreeRTOS provides completely free yet professionally developed, *
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10 * robust, strictly quality controlled, supported, and cross *
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11 * platform software that has become a de facto standard. *
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13 * Help yourself get started quickly and support the FreeRTOS *
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14 * project by purchasing a FreeRTOS tutorial book, reference *
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15 * manual, or both from: http://www.FreeRTOS.org/Documentation *
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19 ***************************************************************************
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21 This file is part of the FreeRTOS distribution.
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23 FreeRTOS is free software; you can redistribute it and/or modify it under
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24 the terms of the GNU General Public License (version 2) as published by the
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25 Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.
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27 >>! NOTE: The modification to the GPL is included to allow you to !<<
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28 >>! distribute a combined work that includes FreeRTOS without being !<<
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29 >>! obliged to provide the source code for proprietary components !<<
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30 >>! outside of the FreeRTOS kernel. !<<
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32 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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33 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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34 FOR A PARTICULAR PURPOSE. Full license text is available from the following
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35 link: http://www.freertos.org/a00114.html
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39 ***************************************************************************
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41 * Having a problem? Start by reading the FAQ "My application does *
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42 * not run, what could be wrong?" *
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44 * http://www.FreeRTOS.org/FAQHelp.html *
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46 ***************************************************************************
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48 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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49 license and Real Time Engineers Ltd. contact details.
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51 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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52 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
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53 compatible FAT file system, and our tiny thread aware UDP/IP stack.
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55 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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56 Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS
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57 licenses offer ticketed support, indemnification and middleware.
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59 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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60 engineered and independently SIL3 certified version for use in safety and
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61 mission critical applications that require provable dependability.
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66 /******************************************************************************
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67 * This project provides two demo applications. A low power project that
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68 * demonstrates the FreeRTOS tickless mode, and a more comprehensive test and
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69 * demo application. The configCREATE_LOW_POWER_DEMO setting (defined at the
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70 * top of FreeRTOSConfig.h) is used to select between the two. The low power
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71 * demo is implemented and described in main_low_power.c. The more
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72 * comprehensive test and demo application is implemented and described in
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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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79 /* Standard includes. */
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82 /* Kernel includes. */
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83 #include "FreeRTOS.h"
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86 /* Standard demo includes - just needed for the LED (ParTest) initialisation
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88 #include "partest.h"
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90 /* Atmel library includes. */
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93 /*-----------------------------------------------------------*/
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96 * Set up the hardware ready to run this demo.
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98 static void prvSetupHardware( void );
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101 * main_low_power() is used when configCREATE_LOW_POWER_DEMO is set to 1.
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102 * main_full() is used when configCREATE_LOW_POWER_DEMO is set to 0.
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103 * configCREATE_LOW_POWER_DEMO is defined at the top of main.c.
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105 extern void main_low_power( void );
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106 extern void main_full( void );
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108 /* Prototypes for the standard FreeRTOS callback/hook functions implemented
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109 within this file. */
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110 void vApplicationMallocFailedHook( void );
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111 void vApplicationIdleHook( void );
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112 void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName );
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113 void vApplicationTickHook( void );
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115 /* A handler for a button interrupt. The button's only purpose is to bring the
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116 CPU out of sleep mode early. */
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117 static void prvButtonISR( void );
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119 /*-----------------------------------------------------------*/
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121 /* See the documentation page for this demo on the FreeRTOS.org web site for
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122 full information - including hardware setup requirements. */
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125 /* Prepare the hardware to run this demo. */
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126 prvSetupHardware();
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128 /* The configCREATE_LOW_POWER_DEMO setting is described at the top of
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130 #if configCREATE_LOW_POWER_DEMO == 1
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142 /*-----------------------------------------------------------*/
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144 static void prvButtonISR( void )
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146 /* The button doesn't do anything other than providing a means for brining
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147 the MCU out of sleep mode early. */
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148 if( eic_line_interrupt_is_pending( EIC, GPIO_PUSH_BUTTON_EIC_LINE ) )
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150 eic_line_clear_interrupt( EIC, GPIO_PUSH_BUTTON_EIC_LINE );
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153 /*-----------------------------------------------------------*/
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155 static void prvSetupHardware( void )
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157 extern void SystemCoreClockUpdate( void );
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158 struct eic_line_config xEICLineConfiguration;
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160 /* Configure the external interrupt controller so button pushes can
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161 generate interrupts. */
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162 xEICLineConfiguration.eic_mode = EIC_MODE_EDGE_TRIGGERED;
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163 xEICLineConfiguration.eic_edge = EIC_EDGE_FALLING_EDGE;
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164 xEICLineConfiguration.eic_level = EIC_LEVEL_LOW_LEVEL;
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165 xEICLineConfiguration.eic_filter = EIC_FILTER_DISABLED;
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166 xEICLineConfiguration.eic_async = EIC_ASYNCH_MODE;
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168 eic_line_set_config( EIC, GPIO_PUSH_BUTTON_EIC_LINE, &xEICLineConfiguration );
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169 eic_line_set_callback( EIC, GPIO_PUSH_BUTTON_EIC_LINE, prvButtonISR, EIC_5_IRQn, 0 );
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170 eic_line_enable( EIC, GPIO_PUSH_BUTTON_EIC_LINE );
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172 /* ASF function to setup clocking. */
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175 /* Ensure all priority bits are assigned as preemption priority bits. */
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176 NVIC_SetPriorityGrouping( 0 );
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178 /* Atmel library function to setup for the evaluation kit being used. */
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181 /* Initialise the sleep manager in case the low power demo is being used. */
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184 /*-----------------------------------------------------------*/
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186 void vApplicationMallocFailedHook( void )
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188 /* vApplicationMallocFailedHook() will only be called if
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189 configUSE_MALLOC_FAILED_HOOK is set to 1 in FreeRTOSConfig.h. It is a hook
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190 function that will get called if a call to pvPortMalloc() fails.
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191 pvPortMalloc() is called internally by the kernel whenever a task, queue,
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192 timer or semaphore is created. It is also called by various parts of the
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193 demo application. If heap_1.c or heap_2.c are used, then the size of the
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194 heap available to pvPortMalloc() is defined by configTOTAL_HEAP_SIZE in
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195 FreeRTOSConfig.h, and the xPortGetFreeHeapSize() API function can be used
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196 to query the size of free heap space that remains (although it does not
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197 provide information on how the remaining heap might be fragmented). */
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198 taskDISABLE_INTERRUPTS();
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201 /*-----------------------------------------------------------*/
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203 void vApplicationIdleHook( void )
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205 /* vApplicationIdleHook() will only be called if configUSE_IDLE_HOOK is set
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206 to 1 in FreeRTOSConfig.h. It will be called on each iteration of the idle
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207 task. It is essential that code added to this hook function never attempts
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208 to block in any way (for example, call xQueueReceive() with a block time
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209 specified, or call vTaskDelay()). If the application makes use of the
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210 vTaskDelete() API function (as this demo application does) then it is also
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211 important that vApplicationIdleHook() is permitted to return to its calling
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212 function, because it is the responsibility of the idle task to clean up
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213 memory allocated by the kernel to any task that has since been deleted. */
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215 /*-----------------------------------------------------------*/
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217 void vApplicationStackOverflowHook( TaskHandle_t pxTask, char *pcTaskName )
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219 ( void ) pcTaskName;
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222 /* Run time stack overflow checking is performed if
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223 configCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2. This hook
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224 function is called if a stack overflow is detected. */
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225 taskDISABLE_INTERRUPTS();
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228 /*-----------------------------------------------------------*/
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230 void vApplicationTickHook( void )
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232 /* This function will be called by each tick interrupt if
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233 configUSE_TICK_HOOK is set to 1 in FreeRTOSConfig.h. User code can be
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234 added here, but the tick hook is called from an interrupt context, so
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235 code must not attempt to block, and only the interrupt safe FreeRTOS API
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236 functions can be used (those that end in FromISR()). */
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238 /*-----------------------------------------------------------*/
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240 void vAssertCalled( void )
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242 volatile unsigned long ul = 0;
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244 taskENTER_CRITICAL();
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246 /* Set ul to a non-zero value using the debugger to step out of this
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250 __asm volatile( "NOP" );
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253 taskEXIT_CRITICAL();
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