2 FreeRTOS V7.4.2 - Copyright (C) 2013 Real Time Engineers Ltd.
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4 FEATURES AND PORTS ARE ADDED TO FREERTOS ALL THE TIME. PLEASE VISIT
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5 http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
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7 ***************************************************************************
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9 * FreeRTOS tutorial books are available in pdf and paperback. *
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10 * Complete, revised, and edited pdf reference manuals are also *
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13 * Purchasing FreeRTOS documentation will not only help you, by *
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14 * ensuring you get running as quickly as possible and with an *
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15 * in-depth knowledge of how to use FreeRTOS, it will also help *
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16 * the FreeRTOS project to continue with its mission of providing *
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17 * professional grade, cross platform, de facto standard solutions *
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18 * for microcontrollers - completely free of charge! *
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20 * >>> See http://www.FreeRTOS.org/Documentation for details. <<< *
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22 * Thank you for using FreeRTOS, and thank you for your support! *
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24 ***************************************************************************
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27 This file is part of the FreeRTOS distribution.
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29 FreeRTOS is free software; you can redistribute it and/or modify it under
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30 the terms of the GNU General Public License (version 2) as published by the
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31 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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33 >>>>>>NOTE<<<<<< The modification to the GPL is included to allow you to
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34 distribute a combined work that includes FreeRTOS without being obliged to
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35 provide the source code for proprietary components outside of the FreeRTOS
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38 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
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39 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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40 FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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41 details. You should have received a copy of the GNU General Public License
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42 and the FreeRTOS license exception along with FreeRTOS; if not it can be
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43 viewed here: http://www.freertos.org/a00114.html and also obtained by
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44 writing to Real Time Engineers Ltd., contact details for whom are available
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45 on the FreeRTOS WEB site.
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49 ***************************************************************************
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51 * Having a problem? Start by reading the FAQ "My application does *
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52 * not run, what could be wrong?" *
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54 * http://www.FreeRTOS.org/FAQHelp.html *
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56 ***************************************************************************
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59 http://www.FreeRTOS.org - Documentation, books, training, latest versions,
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60 license and Real Time Engineers Ltd. contact details.
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62 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
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63 including FreeRTOS+Trace - an indispensable productivity tool, and our new
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64 fully thread aware and reentrant UDP/IP stack.
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66 http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High
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67 Integrity Systems, who sell the code with commercial support,
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68 indemnification and middleware, under the OpenRTOS brand.
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70 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
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71 engineered and independently SIL3 certified version for use in safety and
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72 mission critical applications that require provable dependability.
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75 /******************************************************************************
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76 * This project provides two demo applications. A low power project that
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77 * demonstrates the FreeRTOS tickless mode, and a more comprehensive test and
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78 * demo application. The configCREATE_LOW_POWER_DEMO setting (defined at the
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79 * top of FreeRTOSConfig.h) is used to select between the two. The low power
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80 * demo is implemented and described in main_low_power.c. The more
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81 * comprehensive test and demo application is implemented and described in
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84 * This file implements the code that is not demo specific, including the
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85 * hardware setup and FreeRTOS hook functions.
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88 /* Kernel includes. */
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89 #include "FreeRTOS.h"
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92 /* Platform includes. */
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95 /*-----------------------------------------------------------*/
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98 * main_low_power() is used when configCREATE_LOW_POWER_DEMO is set to 1.
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99 * main_full() is used when configCREATE_LOW_POWER_DEMO is set to 0.
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101 extern void main_low_power( void );
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102 extern void main_full( void );
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104 /* Prototypes for the standard FreeRTOS callback/hook functions implemented
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105 within this file. */
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106 void vApplicationMallocFailedHook( void );
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107 void vApplicationIdleHook( void );
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108 void vApplicationStackOverflowHook( xTaskHandle pxTask, signed char *pcTaskName );
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109 void vApplicationTickHook( void );
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111 /*-----------------------------------------------------------*/
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113 /* See the documentation page for this demo on the FreeRTOS.org web site for
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114 full information - including hardware setup requirements. */
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119 lcd_display( LCD_LINE1, "FreeRTOS" );
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121 /* The configCREATE_LOW_POWER_DEMO setting is described in FreeRTOSConfig.h. */
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122 #if configCREATE_LOW_POWER_DEMO == 1
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124 lcd_display( LCD_LINE2, "LP Demo" );
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129 lcd_display( LCD_LINE2, "Ful Demo" );
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134 /*-----------------------------------------------------------*/
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136 void vApplicationMallocFailedHook( void )
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138 /* vApplicationMallocFailedHook() will only be called if
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139 configUSE_MALLOC_FAILED_HOOK is set to 1 in FreeRTOSConfig.h. It is a hook
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140 function that will get called if a call to pvPortMalloc() fails.
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141 pvPortMalloc() is called internally by the kernel whenever a task, queue,
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142 timer or semaphore is created. It is also called by various parts of the
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143 demo application. If heap_1.c, heap_2.c or heap_4.c are used, then the size
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144 of the heap available to pvPortMalloc() is defined by configTOTAL_HEAP_SIZE
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145 in FreeRTOSConfig.h, and the xPortGetFreeHeapSize() API function can be used
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146 to query the size of free heap space that remains (although it does not
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147 provide information on how the remaining heap might be fragmented). */
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148 taskDISABLE_INTERRUPTS();
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151 /*-----------------------------------------------------------*/
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153 void vApplicationIdleHook( void )
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155 /* vApplicationIdleHook() will only be called if configUSE_IDLE_HOOK is set
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156 to 1 in FreeRTOSConfig.h. It will be called on each iteration of the idle
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157 task. It is essential that code added to this hook function never attempts
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158 to block in any way (for example, call xQueueReceive() with a block time
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159 specified, or call vTaskDelay()). If the application makes use of the
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160 vTaskDelete() API function (as this demo application does) then it is also
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161 important that vApplicationIdleHook() is permitted to return to its calling
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162 function, because it is the responsibility of the idle task to clean up
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163 memory allocated by the kernel to any task that has since been deleted. */
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165 /*-----------------------------------------------------------*/
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167 void vApplicationStackOverflowHook( xTaskHandle pxTask, signed char *pcTaskName )
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169 ( void ) pcTaskName;
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172 /* Run time stack overflow checking is performed if
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173 configCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2. This hook function is
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174 called if a stack overflow is detected. */
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175 taskDISABLE_INTERRUPTS();
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178 /*-----------------------------------------------------------*/
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180 void vApplicationTickHook( void )
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182 /* This function will be called by each tick interrupt if
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183 configUSE_TICK_HOOK is set to 1 in FreeRTOSConfig.h. User code can be
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184 added here, but the tick hook is called from an interrupt context, so
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185 code must not attempt to block, and only the interrupt safe FreeRTOS API
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186 functions can be used (those that end in FromISR()). */
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188 /*-----------------------------------------------------------*/
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190 void vAssertCalled( void )
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192 volatile unsigned long ul = 0;
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194 taskENTER_CRITICAL();
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196 /* Set ul to a non-zero value using the debugger to step out of this
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200 __asm volatile( "NOP" );
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203 taskEXIT_CRITICAL();
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