2 FreeRTOS.org V5.4.0 - Copyright (C) 2003-2009 Richard Barry.
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4 This file is part of the FreeRTOS.org distribution.
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6 FreeRTOS.org is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License (version 2) as published
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8 by the Free Software Foundation and modified by the FreeRTOS exception.
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9 **NOTE** The exception to the GPL is included to allow you to distribute a
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10 combined work that includes FreeRTOS.org without being obliged to provide
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11 the source code for any proprietary components. Alternative commercial
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12 license and support terms are also available upon request. See the
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13 licensing section of http://www.FreeRTOS.org for full details.
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15 FreeRTOS.org is distributed in the hope that it will be useful, but WITHOUT
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16 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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20 You should have received a copy of the GNU General Public License along
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21 with FreeRTOS.org; if not, write to the Free Software Foundation, Inc., 59
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22 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 ***************************************************************************
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27 * Get the FreeRTOS eBook! See http://www.FreeRTOS.org/Documentation *
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29 * This is a concise, step by step, 'hands on' guide that describes both *
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30 * general multitasking concepts and FreeRTOS specifics. It presents and *
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31 * explains numerous examples that are written using the FreeRTOS API. *
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32 * Full source code for all the examples is provided in an accompanying *
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35 ***************************************************************************
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39 Please ensure to read the configuration and relevant port sections of the
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40 online documentation.
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42 http://www.FreeRTOS.org - Documentation, latest information, license and
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45 http://www.SafeRTOS.com - A version that is certified for use in safety
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48 http://www.OpenRTOS.com - Commercial support, development, porting,
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49 licensing and training services.
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53 NOTE : Tasks run in system mode and the scheduler runs in Supervisor mode.
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54 The processor MUST be in supervisor mode when vTaskStartScheduler is
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55 called. The demo applications included in the FreeRTOS.org download switch
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56 to supervisor mode prior to main being called. If you are not using one of
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57 these demo application projects then ensure Supervisor mode is used.
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61 * Creates all the demo application tasks, then starts the scheduler. The WEB
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62 * documentation provides more details of the demo application tasks.
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64 * Main.c also creates a task called "Check". This only executes every three
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65 * seconds but has the highest priority so is guaranteed to get processor time.
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66 * Its main function is to check that all the other tasks are still operational.
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67 * Each task (other than the "flash" tasks) maintains a unique count that is
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68 * incremented each time the task successfully completes its function. Should
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69 * any error occur within such a task the count is permanently halted. The
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70 * check task inspects the count of each task to ensure it has changed since
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71 * the last time the check task executed. If all the count variables have
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72 * changed all the tasks are still executing error free, and the check task
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73 * toggles the onboard LED. Should any task contain an error at any time
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74 * the LED toggle rate will change from 3 seconds to 500ms.
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78 /* Library includes. */
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82 /* Scheduler includes. */
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83 #include "FreeRTOS.h"
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86 /* Demo application includes. */
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88 #include "integer.h"
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91 #include "semtest.h"
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92 #include "dynamic.h"
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93 #include "partest.h"
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94 #include "comtest2.h"
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96 /* Priorities for the demo application tasks. */
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97 #define mainLED_TASK_PRIORITY ( tskIDLE_PRIORITY + 3 )
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98 #define mainQUEUE_POLL_PRIORITY ( tskIDLE_PRIORITY + 2 )
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99 #define mainCHECK_TASK_PRIORITY ( tskIDLE_PRIORITY + 4 )
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100 #define mainSEM_TEST_PRIORITY ( tskIDLE_PRIORITY + 1 )
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101 #define mainBLOCK_Q_PRIORITY ( tskIDLE_PRIORITY + 2 )
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102 #define mainCOM_TEST_PRIORITY ( tskIDLE_PRIORITY + 2 )
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104 /* Constants required by the 'Check' task. */
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105 #define mainNO_ERROR_FLASH_PERIOD ( ( portTickType ) 3000 / portTICK_RATE_MS )
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106 #define mainERROR_FLASH_PERIOD ( ( portTickType ) 500 / portTICK_RATE_MS )
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107 #define mainCHECK_TASK_LED ( 4 )
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109 /* Constants for the ComTest tasks. */
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110 #define mainCOM_TEST_BAUD_RATE ( ( unsigned portLONG ) 115200 )
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111 #define mainCOM_TEST_LED ( 6 ) /* The LED built onto the kickstart board. */
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114 * The task that executes at the highest priority and calls
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115 * prvCheckOtherTasksAreStillRunning(). See the description at the top
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118 static void vErrorChecks( void *pvParameters );
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121 * Configure the processor for use with the IAR STR71x demo board. This
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122 * just sets the PLL for the required frequency.
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124 static void prvSetupHardware( void );
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127 * Checks that all the demo application tasks are still executing without error
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128 * - as described at the top of the file. Called by vErrorChecks().
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130 static portLONG prvCheckOtherTasksAreStillRunning( void );
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133 /*-----------------------------------------------------------*/
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136 * Starts all the other tasks, then starts the scheduler.
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140 /* Setup any hardware that has not already been configured by the low
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141 level init routines. */
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142 prvSetupHardware();
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144 /* Initialise the LED outputs for use by the demo application tasks. */
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145 vParTestInitialise();
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147 /* Start all the standard demo application tasks. */
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148 vStartIntegerMathTasks( tskIDLE_PRIORITY );
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149 vStartLEDFlashTasks( mainLED_TASK_PRIORITY );
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150 vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY );
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151 vStartSemaphoreTasks( mainSEM_TEST_PRIORITY );
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152 vStartBlockingQueueTasks( mainBLOCK_Q_PRIORITY );
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153 vStartDynamicPriorityTasks();
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154 vAltStartComTestTasks( mainCOM_TEST_PRIORITY, mainCOM_TEST_BAUD_RATE, mainCOM_TEST_LED );
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156 /* Start the check task - which is defined in this file. */
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157 xTaskCreate( vErrorChecks, "Check", configMINIMAL_STACK_SIZE, NULL, mainCHECK_TASK_PRIORITY, NULL );
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159 /* Start the scheduler.
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161 NOTE : Tasks run in system mode and the scheduler runs in Supervisor mode.
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162 The processor MUST be in supervisor mode when vTaskStartScheduler is
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163 called. The demo applications included in the FreeRTOS.org download switch
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164 to supervisor mode prior to main being called. If you are not using one of
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165 these demo application projects then ensure Supervisor mode is used here. */
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167 vTaskStartScheduler();
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169 /* We should never get here as control is now taken by the scheduler. */
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172 /*-----------------------------------------------------------*/
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174 static void prvSetupHardware( void )
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176 /* Setup the PLL to generate a 48MHz clock from the 4MHz CLK. */
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178 /* Turn of the div by two. */
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179 RCCU_Div2Config( DISABLE );
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181 /* 48MHz = ( 4MHz * 12 ) / 1 */
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182 RCCU_PLL1Config( RCCU_PLL1_Mul_12, RCCU_Div_1 );
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183 RCCU_RCLKSourceConfig( RCCU_PLL1_Output );
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185 /*-----------------------------------------------------------*/
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187 static void vErrorChecks( void *pvParameters )
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189 portTickType xDelayPeriod = mainNO_ERROR_FLASH_PERIOD;
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190 portTickType xLastWakeTime;
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192 /* The parameters are not used in this task. */
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193 ( void ) pvParameters;
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195 /* Initialise xLastWakeTime to ensure the first call to vTaskDelayUntil()
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196 functions correctly. */
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197 xLastWakeTime = xTaskGetTickCount();
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199 /* Cycle for ever, delaying then checking all the other tasks are still
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200 operating without error. If an error is detected then the delay period
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201 is decreased from mainNO_ERROR_FLASH_PERIOD to mainERROR_FLASH_PERIOD so
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202 the on board LED flash rate will increase. */
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206 /* Delay until it is time to execute again. The delay period is
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207 shorter following an error so the LED flashes faster. */
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208 vTaskDelayUntil( &xLastWakeTime, xDelayPeriod );
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210 /* Check all the standard demo application tasks are executing without
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212 if( prvCheckOtherTasksAreStillRunning() != pdPASS )
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214 /* An error has been detected in one of the tasks - flash faster. */
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215 xDelayPeriod = mainERROR_FLASH_PERIOD;
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218 vParTestToggleLED( mainCHECK_TASK_LED );
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221 /*-----------------------------------------------------------*/
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223 static portLONG prvCheckOtherTasksAreStillRunning( void )
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225 portLONG lReturn = ( portLONG ) pdPASS;
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227 /* Check all the demo tasks (other than the flash tasks) to ensure
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228 that they are all still running, and that none of them have detected
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231 if( xAreIntegerMathsTaskStillRunning() != pdTRUE )
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233 lReturn = ( portLONG ) pdFAIL;
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236 if( xArePollingQueuesStillRunning() != pdTRUE )
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238 lReturn = ( portLONG ) pdFAIL;
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241 if( xAreSemaphoreTasksStillRunning() != pdTRUE )
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243 lReturn = ( portLONG ) pdFAIL;
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246 if( xAreBlockingQueuesStillRunning() != pdTRUE )
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248 lReturn = ( portLONG ) pdFAIL;
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251 if( xAreComTestTasksStillRunning() != pdTRUE )
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253 lReturn = ( portLONG ) pdFAIL;
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256 if( xAreDynamicPriorityTasksStillRunning() != pdTRUE )
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258 lReturn = ( portLONG ) pdFAIL;
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263 /*-----------------------------------------------------------*/
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