2 FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.
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4 ***************************************************************************
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8 * + New to FreeRTOS, *
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9 * + Wanting to learn FreeRTOS or multitasking in general quickly *
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10 * + Looking for basic training, *
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11 * + Wanting to improve your FreeRTOS skills and productivity *
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13 * then take a look at the FreeRTOS books - available as PDF or paperback *
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15 * "Using the FreeRTOS Real Time Kernel - a Practical Guide" *
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16 * http://www.FreeRTOS.org/Documentation *
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18 * A pdf reference manual is also available. Both are usually delivered *
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19 * to your inbox within 20 minutes to two hours when purchased between 8am *
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20 * and 8pm GMT (although please allow up to 24 hours in case of *
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21 * exceptional circumstances). Thank you for your support! *
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23 ***************************************************************************
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25 This file is part of the FreeRTOS distribution.
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27 FreeRTOS is free software; you can redistribute it and/or modify it under
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28 the terms of the GNU General Public License (version 2) as published by the
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29 Free Software Foundation AND MODIFIED BY the FreeRTOS exception.
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30 ***NOTE*** The exception to the GPL is included to allow you to distribute
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31 a combined work that includes FreeRTOS without being obliged to provide the
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32 source code for proprietary components outside of the FreeRTOS kernel.
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33 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT
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34 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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35 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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36 more details. You should have received a copy of the GNU General Public
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37 License and the FreeRTOS license exception along with FreeRTOS; if not it
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38 can be viewed here: http://www.freertos.org/a00114.html and also obtained
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39 by writing to Richard Barry, contact details for whom are available on the
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44 http://www.FreeRTOS.org - Documentation, latest information, license and
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47 http://www.SafeRTOS.com - A version that is certified for use in safety
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50 http://www.OpenRTOS.com - Commercial support, development, porting,
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51 licensing and training services.
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54 /* Standard includes. */
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57 /* Kernel includes. */
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58 #include "FreeRTOS.h"
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62 /* Demo application includes. */
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63 #include "partest.h"
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65 #include "dynamic.h"
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67 /* ST driver includes. */
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68 #include "stm32l1xx_usart.h"
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70 /* Eval board includes. */
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71 #include "stm32_eval.h"
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72 #include "stm32l152_eval_lcd.h"
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74 #define mainFLASH_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )
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75 #define mainLCD_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )
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77 #define mainLCD_TASK_STACK_SIZE ( configMINIMAL_STACK_SIZE * 2 )
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79 #define mainQUEUE_LENGTH ( 5 )
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81 #define mainMESSAGE_BUTTON_UP ( 1 )
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82 #define mainMESSAGE_BUTTON_DOWN ( 2 )
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83 #define mainMESSAGE_BUTTON_LEFT ( 3 )
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84 #define mainMESSAGE_BUTTON_RIGHT ( 4 )
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85 #define mainMESSAGE_BUTTON_SEL ( 5 )
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86 #define mainMESSAGE_STATUS ( 6 )
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89 * System configuration is performed prior to main() being called, this function
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90 * configures the peripherals used by the demo application.
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92 static void prvSetupHardware( void );
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93 static void prvLCDTask( void *pvParameters );
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94 static void vTempTask( void *pv );
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96 static xQueueHandle xLCDQueue = NULL;
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101 long lMessageValue;
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106 prvSetupHardware();
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108 /* Create the queue used by tasks and interrupts to send strings to the LCD
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110 xLCDQueue = xQueueCreate( mainQUEUE_LENGTH, sizeof( xQueueMessage ) );
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112 if( xLCDQueue != NULL )
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114 xTaskCreate( prvLCDTask, ( signed char * ) "LCD", mainLCD_TASK_STACK_SIZE, NULL, mainLCD_TASK_PRIORITY, NULL );
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115 xTaskCreate( vTempTask, ( signed char * ) "Temp", configMINIMAL_STACK_SIZE, NULL, tskIDLE_PRIORITY, NULL );
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116 vStartDynamicPriorityTasks();
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117 vStartLEDFlashTasks( mainFLASH_TASK_PRIORITY );
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119 vTaskStartScheduler();
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124 /*-----------------------------------------------------------*/
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126 static void prvLCDTask( void *pvParameters )
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128 xQueueMessage xReceivedMessage;
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129 long lLine = Line1;
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130 const long lFontHeight = (((sFONT *)LCD_GetFont())->Height);
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131 static char cBuffer[ 32 ];
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135 xQueueReceive( xLCDQueue, &xReceivedMessage, portMAX_DELAY );
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137 if( lLine > Line9 )
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143 switch( xReceivedMessage.cMessageID )
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145 case mainMESSAGE_BUTTON_UP : sprintf( cBuffer, "Button up = %d", xReceivedMessage.lMessageValue );
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147 case mainMESSAGE_BUTTON_DOWN : sprintf( cBuffer, "Button down = %d", xReceivedMessage.lMessageValue );
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149 case mainMESSAGE_BUTTON_LEFT : sprintf( cBuffer, "Button left = %d", xReceivedMessage.lMessageValue );
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151 case mainMESSAGE_BUTTON_RIGHT : sprintf( cBuffer, "Button right = %d", xReceivedMessage.lMessageValue );
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153 case mainMESSAGE_BUTTON_SEL : sprintf( cBuffer, "Select interrupt!" );
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155 case mainMESSAGE_STATUS : sprintf( cBuffer, "Task status = %s", ( ( xReceivedMessage.lMessageValue ) ? "PASS" : "FAIL" ) );
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157 default : sprintf( cBuffer, "Unknown message" );
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161 LCD_DisplayStringLine( lLine, ( uint8_t * ) cBuffer );
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162 lLine += lFontHeight;
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165 /*-----------------------------------------------------------*/
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167 void EXTI9_5_IRQHandler( void )
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169 const xQueueMessage xMessage = { mainMESSAGE_BUTTON_SEL, 0 };
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170 long lHigherPriorityTaskWoken = pdFALSE;
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172 xQueueSendFromISR( xLCDQueue, &xMessage, &lHigherPriorityTaskWoken );
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173 EXTI_ClearITPendingBit( SEL_BUTTON_EXTI_LINE );
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174 portEND_SWITCHING_ISR( lHigherPriorityTaskWoken );
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176 /*-----------------------------------------------------------*/
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178 void vApplicationTickHook( void )
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180 static unsigned long ulCounter = 0;
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181 static const unsigned long ulCheckFrequency = 5000UL / portTICK_RATE_MS;
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182 static xQueueMessage xStatusMessage = { mainMESSAGE_STATUS, pdPASS };
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183 long lHigherPriorityTaskWoken = pdFALSE; /* Not used in this case as this is the tick hook. */
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186 if( ulCounter >= ulCheckFrequency )
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188 if( xAreDynamicPriorityTasksStillRunning() != pdPASS )
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190 xStatusMessage.lMessageValue = pdFAIL;
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193 xQueueSendFromISR( xLCDQueue, &xStatusMessage, &lHigherPriorityTaskWoken );
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197 /*-----------------------------------------------------------*/
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199 static void vTempTask( void *pv )
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201 long lLastState = pdTRUE;
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203 xQueueMessage xMessage;
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207 lState = STM_EVAL_PBGetState( BUTTON_UP );
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208 if( lState != lLastState )
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210 xMessage.cMessageID = mainMESSAGE_BUTTON_UP;
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211 xMessage.lMessageValue = lState;
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212 lLastState = lState;
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213 xQueueSend( xLCDQueue, &xMessage, portMAX_DELAY );
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219 /*-----------------------------------------------------------*/
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221 static void prvSetupHardware( void )
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223 /* Initialise the LEDs. */
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224 vParTestInitialise();
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227 /* Initialise the joystick inputs. */
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228 STM_EVAL_PBInit( BUTTON_UP, BUTTON_MODE_GPIO );
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229 STM_EVAL_PBInit( BUTTON_DOWN, BUTTON_MODE_GPIO );
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230 STM_EVAL_PBInit( BUTTON_LEFT, BUTTON_MODE_GPIO );
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231 STM_EVAL_PBInit( BUTTON_RIGHT, BUTTON_MODE_GPIO );
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233 /* The select button in the middle of the joystick is configured to generate
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234 an interrupt. The Eval board library will configure the interrupt
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235 priority to be the lowest priority available - this is important as the
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236 interrupt service routine makes use of a FreeRTOS API function so must
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237 therefore use a priority equal to or below that set by the
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238 configMAX_SYSCALL_INTERRUPT_PRIORITY() value set in FreeRTOSConfig.h. */
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239 STM_EVAL_PBInit( BUTTON_SEL, BUTTON_MODE_EXTI );
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242 USART_InitTypeDef USART_InitStructure;
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244 USART_InitStructure.USART_BaudRate = 115200;
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245 USART_InitStructure.USART_WordLength = USART_WordLength_8b;
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246 USART_InitStructure.USART_StopBits = USART_StopBits_1;
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247 USART_InitStructure.USART_Parity = USART_Parity_No;
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248 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
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249 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
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251 STM_EVAL_COMInit( COM1, &USART_InitStructure );
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254 /* Initialize the LCD */
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255 STM32L152_LCD_Init();
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258 LCD_SetBackColor(Blue);
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259 LCD_SetTextColor(White);
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260 LCD_DisplayStringLine(Line0, " www.FreeRTOS.org");
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262 /*-----------------------------------------------------------*/
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