2 FreeRTOS.org V5.1.2 - 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
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 2 of the License, or
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9 (at your option) any later version.
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11 FreeRTOS.org is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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16 You should have received a copy of the GNU General Public License
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17 along with FreeRTOS.org; if not, write to the Free Software
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18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 A special exception to the GPL can be applied should you wish to distribute
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21 a combined work that includes FreeRTOS.org, without being obliged to provide
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22 the source code for any proprietary components. See the licensing section
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23 of http://www.FreeRTOS.org for full details of how and when the exception
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26 ***************************************************************************
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27 ***************************************************************************
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29 * Get the FreeRTOS eBook! See http://www.FreeRTOS.org/Documentation *
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31 * This is a concise, step by step, 'hands on' guide that describes both *
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32 * general multitasking concepts and FreeRTOS specifics. It presents and *
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33 * explains numerous examples that are written using the FreeRTOS API. *
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34 * Full source code for all the examples is provided in an accompanying *
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37 ***************************************************************************
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38 ***************************************************************************
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40 Please ensure to read the configuration and relevant port sections of the
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41 online documentation.
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43 http://www.FreeRTOS.org - Documentation, latest information, license and
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46 http://www.SafeRTOS.com - A version that is certified for use in safety
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49 http://www.OpenRTOS.com - Commercial support, development, porting,
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50 licensing and training services.
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54 * Creates all the demo application tasks, then starts the scheduler. The WEB
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55 * documentation provides more details of the standard demo application tasks.
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56 * In addition to the standard demo tasks, the following tasks and tests are
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57 * defined and/or created within this file:
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59 * "Fast Interrupt Test" - A high frequency periodic interrupt is generated
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60 * using a free running timer to demonstrate the use of the
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61 * configKERNEL_INTERRUPT_PRIORITY configuration constant. The interrupt
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62 * service routine measures the number of processor clocks that occur between
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63 * each interrupt - and in so doing measures the jitter in the interrupt timing.
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64 * The maximum measured jitter time is latched in the ulMaxJitter variable, and
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65 * displayed on the LCD by the 'Check' task as described below. The
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66 * fast interrupt is configured and handled in the timertest.c source file.
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68 * "LCD" task - the LCD task is a 'gatekeeper' task. It is the only task that
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69 * is permitted to access the display directly. Other tasks wishing to write a
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70 * message to the LCD send the message on a queue to the LCD task instead of
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71 * accessing the LCD themselves. The LCD task just blocks on the queue waiting
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72 * for messages - waking and displaying the messages as they arrive.
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74 * "Check" task - This only executes every five seconds but has the highest
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75 * priority so is guaranteed to get processor time. Its main function is to
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76 * check that all the standard demo tasks are still operational. Should any
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77 * unexpected behaviour within a demo task be discovered the 'check' task will
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78 * write an error to the LCD (via the LCD task). If all the demo tasks are
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79 * executing with their expected behaviour then the check task writes PASS
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80 * along with the max jitter time to the LCD (again via the LCD task), as
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85 /* Standard includes. */
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88 /* Scheduler includes. */
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89 #include "FreeRTOS.h"
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93 /* Library includes. */
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94 #include "stm32f10x_it.h"
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96 /* Demo app includes. */
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98 #include "LCD_Message.h"
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101 #include "integer.h"
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102 #include "blocktim.h"
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103 #include "partest.h"
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104 #include "semtest.h"
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107 #include "comtest2.h"
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109 /* Task priorities. */
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110 #define mainQUEUE_POLL_PRIORITY ( tskIDLE_PRIORITY + 2 )
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111 #define mainCHECK_TASK_PRIORITY ( tskIDLE_PRIORITY + 3 )
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112 #define mainSEM_TEST_PRIORITY ( tskIDLE_PRIORITY + 1 )
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113 #define mainBLOCK_Q_PRIORITY ( tskIDLE_PRIORITY + 2 )
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114 #define mainCREATOR_TASK_PRIORITY ( tskIDLE_PRIORITY + 3 )
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115 #define mainFLASH_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )
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116 #define mainCOM_TEST_PRIORITY ( tskIDLE_PRIORITY + 1 )
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117 #define mainINTEGER_TASK_PRIORITY ( tskIDLE_PRIORITY )
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119 /* Constants related to the LCD. */
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120 #define mainMAX_LINE ( 240 )
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121 #define mainROW_INCREMENT ( 24 )
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122 #define mainMAX_COLUMN ( 20 )
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123 #define mainCOLUMN_START ( 319 )
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124 #define mainCOLUMN_INCREMENT ( 16 )
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126 /* The maximum number of message that can be waiting for display at any one
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128 #define mainLCD_QUEUE_SIZE ( 3 )
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130 /* The check task uses the sprintf function so requires a little more stack. */
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131 #define mainCHECK_TASK_STACK_SIZE ( configMINIMAL_STACK_SIZE + 50 )
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133 /* Dimensions the buffer into which the jitter time is written. */
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134 #define mainMAX_MSG_LEN 25
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136 /* The time between cycles of the 'check' task. */
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137 #define mainCHECK_DELAY ( ( portTickType ) 5000 / portTICK_RATE_MS )
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139 /* The number of nano seconds between each processor clock. */
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140 #define mainNS_PER_CLOCK ( ( unsigned portLONG ) ( ( 1.0 / ( double ) configCPU_CLOCK_HZ ) * 1000000000.0 ) )
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142 /* Baud rate used by the comtest tasks. */
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143 #define mainCOM_TEST_BAUD_RATE ( 115200 )
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145 /* The LED used by the comtest tasks. See the comtest.c file for more
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147 #define mainCOM_TEST_LED ( 3 )
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149 /*-----------------------------------------------------------*/
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152 * Configure the clocks, GPIO and other peripherals as required by the demo.
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154 static void prvSetupHardware( void );
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157 * Configure the LCD as required by the demo.
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159 static void prvConfigureLCD( void );
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162 * The LCD is written two by more than one task so is controlled by a
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163 * 'gatekeeper' task. This is the only task that is actually permitted to
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164 * access the LCD directly. Other tasks wanting to display a message send
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165 * the message to the gatekeeper.
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167 static void vLCDTask( void *pvParameters );
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170 * Retargets the C library printf function to the USART.
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172 int fputc( int ch, FILE *f );
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175 * Checks the status of all the demo tasks then prints a message to the
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176 * display. The message will be either PASS - and include in brackets the
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177 * maximum measured jitter time (as described at the to of the file), or a
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178 * message that describes which of the standard demo tasks an error has been
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181 * Messages are not written directly to the terminal, but passed to vLCDTask
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184 static void vCheckTask( void *pvParameters );
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187 * Configures the timers and interrupts for the fast interrupt test as
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188 * described at the top of this file.
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190 extern void vSetupTimerTest( void );
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192 /*-----------------------------------------------------------*/
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194 /* The queue used to send messages to the LCD task. */
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195 xQueueHandle xLCDQueue;
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197 /*-----------------------------------------------------------*/
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205 prvSetupHardware();
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207 /* Create the queue used by the LCD task. Messages for display on the LCD
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208 are received via this queue. */
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209 xLCDQueue = xQueueCreate( mainLCD_QUEUE_SIZE, sizeof( xLCDMessage ) );
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211 /* Start the standard demo tasks. */
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212 vStartBlockingQueueTasks( mainBLOCK_Q_PRIORITY );
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213 vCreateBlockTimeTasks();
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214 vStartSemaphoreTasks( mainSEM_TEST_PRIORITY );
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215 vStartPolledQueueTasks( mainQUEUE_POLL_PRIORITY );
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216 vStartIntegerMathTasks( mainINTEGER_TASK_PRIORITY );
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217 vStartLEDFlashTasks( mainFLASH_TASK_PRIORITY );
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218 vAltStartComTestTasks( mainCOM_TEST_PRIORITY, mainCOM_TEST_BAUD_RATE, mainCOM_TEST_LED );
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220 /* Start the tasks defined within this file/specific to this demo. */
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221 xTaskCreate( vCheckTask, ( signed portCHAR * ) "Check", mainCHECK_TASK_STACK_SIZE, NULL, mainCHECK_TASK_PRIORITY, NULL );
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222 xTaskCreate( vLCDTask, ( signed portCHAR * ) "LCD", configMINIMAL_STACK_SIZE, NULL, tskIDLE_PRIORITY, NULL );
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224 /* The suicide tasks must be created last as they need to know how many
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225 tasks were running prior to their creation in order to ascertain whether
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226 or not the correct/expected number of tasks are running at any given time. */
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227 vCreateSuicidalTasks( mainCREATOR_TASK_PRIORITY );
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229 /* Configure the timers used by the fast interrupt timer test. */
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232 /* Start the scheduler. */
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233 vTaskStartScheduler();
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235 /* Will only get here if there was not enough heap space to create the
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239 /*-----------------------------------------------------------*/
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241 void vLCDTask( void *pvParameters )
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243 xLCDMessage xMessage;
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245 /* Initialise the LCD and display a startup message. */
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247 LCD_DrawMonoPict( ( unsigned portLONG * ) pcBitmap );
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251 /* Wait for a message to arrive that requires displaying. */
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252 while( xQueueReceive( xLCDQueue, &xMessage, portMAX_DELAY ) != pdPASS );
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254 /* Display the message. Print each message to a different position. */
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255 printf( ( portCHAR const * ) xMessage.pcMessage );
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258 /*-----------------------------------------------------------*/
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260 static void vCheckTask( void *pvParameters )
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262 portTickType xLastExecutionTime;
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263 xLCDMessage xMessage;
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264 static signed portCHAR cPassMessage[ mainMAX_MSG_LEN ];
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265 extern unsigned portSHORT usMaxJitter;
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267 xLastExecutionTime = xTaskGetTickCount();
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268 xMessage.pcMessage = cPassMessage;
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272 /* Perform this check every mainCHECK_DELAY milliseconds. */
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273 vTaskDelayUntil( &xLastExecutionTime, mainCHECK_DELAY );
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275 /* Has an error been found in any task? */
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277 if( xAreBlockingQueuesStillRunning() != pdTRUE )
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279 xMessage.pcMessage = "ERROR IN BLOCK Q\n";
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281 else if( xAreBlockTimeTestTasksStillRunning() != pdTRUE )
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283 xMessage.pcMessage = "ERROR IN BLOCK TIME\n";
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285 else if( xAreSemaphoreTasksStillRunning() != pdTRUE )
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287 xMessage.pcMessage = "ERROR IN SEMAPHORE\n";
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289 else if( xArePollingQueuesStillRunning() != pdTRUE )
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291 xMessage.pcMessage = "ERROR IN POLL Q\n";
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293 else if( xIsCreateTaskStillRunning() != pdTRUE )
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295 xMessage.pcMessage = "ERROR IN CREATE\n";
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297 else if( xAreIntegerMathsTaskStillRunning() != pdTRUE )
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299 xMessage.pcMessage = "ERROR IN MATH\n";
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301 else if( xAreComTestTasksStillRunning() != pdTRUE )
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303 xMessage.pcMessage = "ERROR IN COM TEST\n";
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307 sprintf( ( portCHAR * ) cPassMessage, "PASS [%uns]\n", ( ( unsigned portLONG ) usMaxJitter ) * mainNS_PER_CLOCK );
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310 /* Send the message to the LCD gatekeeper for display. */
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311 xQueueSend( xLCDQueue, &xMessage, portMAX_DELAY );
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314 /*-----------------------------------------------------------*/
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316 static void prvSetupHardware( void )
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318 /* Start with the clocks in their expected state. */
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321 /* Enable HSE (high speed external clock). */
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322 RCC_HSEConfig( RCC_HSE_ON );
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324 /* Wait till HSE is ready. */
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325 while( RCC_GetFlagStatus( RCC_FLAG_HSERDY ) == RESET )
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329 /* 2 wait states required on the flash. */
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330 *( ( unsigned portLONG * ) 0x40022000 ) = 0x02;
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332 /* HCLK = SYSCLK */
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333 RCC_HCLKConfig( RCC_SYSCLK_Div1 );
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336 RCC_PCLK2Config( RCC_HCLK_Div1 );
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338 /* PCLK1 = HCLK/2 */
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339 RCC_PCLK1Config( RCC_HCLK_Div2 );
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341 /* PLLCLK = 8MHz * 9 = 72 MHz. */
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342 RCC_PLLConfig( RCC_PLLSource_HSE_Div1, RCC_PLLMul_9 );
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345 RCC_PLLCmd( ENABLE );
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347 /* Wait till PLL is ready. */
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348 while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
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352 /* Select PLL as system clock source. */
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353 RCC_SYSCLKConfig( RCC_SYSCLKSource_PLLCLK );
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355 /* Wait till PLL is used as system clock source. */
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356 while( RCC_GetSYSCLKSource() != 0x08 )
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360 /* Enable GPIOA, GPIOB, GPIOC, GPIOD, GPIOE and AFIO clocks */
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361 RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB |RCC_APB2Periph_GPIOC
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362 | RCC_APB2Periph_GPIOD | RCC_APB2Periph_GPIOE | RCC_APB2Periph_AFIO, ENABLE );
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364 /* SPI2 Periph clock enable */
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365 RCC_APB1PeriphClockCmd( RCC_APB1Periph_SPI2, ENABLE );
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368 /* Set the Vector Table base address at 0x08000000 */
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369 NVIC_SetVectorTable( NVIC_VectTab_FLASH, 0x0 );
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371 NVIC_PriorityGroupConfig( NVIC_PriorityGroup_4 );
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373 /* Configure HCLK clock as SysTick clock source. */
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374 SysTick_CLKSourceConfig( SysTick_CLKSource_HCLK );
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376 vParTestInitialise();
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378 /*-----------------------------------------------------------*/
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380 static void prvConfigureLCD( void )
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382 GPIO_InitTypeDef GPIO_InitStructure;
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384 /* Configure LCD Back Light (PA8) as output push-pull */
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385 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
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386 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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387 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
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388 GPIO_Init( GPIOA, &GPIO_InitStructure );
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390 /* Set the Backlight Pin */
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391 GPIO_WriteBit(GPIOA, GPIO_Pin_8, Bit_SET);
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393 /* Initialize the LCD */
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396 /* Set the Back Color */
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397 LCD_SetBackColor( White );
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399 /* Set the Text Color */
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400 LCD_SetTextColor( 0x051F );
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404 /*-----------------------------------------------------------*/
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406 int fputc( int ch, FILE *f )
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408 static unsigned portSHORT usColumn = 0, usRefColumn = mainCOLUMN_START;
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409 static unsigned portCHAR ucLine = 0;
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411 if( ( usColumn == 0 ) && ( ucLine == 0 ) )
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418 /* Display one character on LCD */
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419 LCD_DisplayChar( ucLine, usRefColumn, (u8) ch );
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421 /* Decrement the column position by 16 */
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422 usRefColumn -= mainCOLUMN_INCREMENT;
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424 /* Increment the character counter */
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426 if( usColumn == mainMAX_COLUMN )
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428 ucLine += mainROW_INCREMENT;
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429 usRefColumn = mainCOLUMN_START;
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435 /* Move back to the first column of the next line. */
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436 ucLine += mainROW_INCREMENT;
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437 usRefColumn = mainCOLUMN_START;
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441 /* Wrap back to the top of the display. */
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442 if( ucLine >= mainMAX_LINE )
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449 /*-----------------------------------------------------------*/
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452 /* Keep the linker happy. */
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453 void assert_failed( unsigned portCHAR* pcFile, unsigned portLONG ulLine )
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