--- /dev/null
+/*\r
+ FreeRTOS V8.2.2 - Copyright (C) 2015 Real Time Engineers Ltd.\r
+ All rights reserved\r
+\r
+ VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.\r
+\r
+ This file is part of the FreeRTOS distribution.\r
+\r
+ FreeRTOS is free software; you can redistribute it and/or modify it under\r
+ the terms of the GNU General Public License (version 2) as published by the\r
+ Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception.\r
+\r
+ ***************************************************************************\r
+ >>! NOTE: The modification to the GPL is included to allow you to !<<\r
+ >>! distribute a combined work that includes FreeRTOS without being !<<\r
+ >>! obliged to provide the source code for proprietary components !<<\r
+ >>! outside of the FreeRTOS kernel. !<<\r
+ ***************************************************************************\r
+\r
+ FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY\r
+ WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS\r
+ FOR A PARTICULAR PURPOSE. Full license text is available on the following\r
+ link: http://www.freertos.org/a00114.html\r
+\r
+ ***************************************************************************\r
+ * *\r
+ * FreeRTOS provides completely free yet professionally developed, *\r
+ * robust, strictly quality controlled, supported, and cross *\r
+ * platform software that is more than just the market leader, it *\r
+ * is the industry's de facto standard. *\r
+ * *\r
+ * Help yourself get started quickly while simultaneously helping *\r
+ * to support the FreeRTOS project by purchasing a FreeRTOS *\r
+ * tutorial book, reference manual, or both: *\r
+ * http://www.FreeRTOS.org/Documentation *\r
+ * *\r
+ ***************************************************************************\r
+\r
+ http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading\r
+ the FAQ page "My application does not run, what could be wrong?". Have you\r
+ defined configASSERT()?\r
+\r
+ http://www.FreeRTOS.org/support - In return for receiving this top quality\r
+ embedded software for free we request you assist our global community by\r
+ participating in the support forum.\r
+\r
+ http://www.FreeRTOS.org/training - Investing in training allows your team to\r
+ be as productive as possible as early as possible. Now you can receive\r
+ FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers\r
+ Ltd, and the world's leading authority on the world's leading RTOS.\r
+\r
+ http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,\r
+ including FreeRTOS+Trace - an indispensable productivity tool, a DOS\r
+ compatible FAT file system, and our tiny thread aware UDP/IP stack.\r
+\r
+ http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.\r
+ Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.\r
+\r
+ http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High\r
+ Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS\r
+ licenses offer ticketed support, indemnification and commercial middleware.\r
+\r
+ http://www.SafeRTOS.com - High Integrity Systems also provide a safety\r
+ engineered and independently SIL3 certified version for use in safety and\r
+ mission critical applications that require provable dependability.\r
+\r
+ 1 tab == 4 spaces!\r
+*/\r
+\r
+/******************************************************************************\r
+ * NOTE 1: This project provides two demo applications. A simple blinky style\r
+ * project, and a more comprehensive test and demo application. The\r
+ * mainCREATE_SIMPLE_BLINKY_DEMO_ONLY setting in main.c is used to select\r
+ * between the two. See the notes on using mainCREATE_SIMPLE_BLINKY_DEMO_ONLY\r
+ * in main.c. This file implements the simply blinky style version.\r
+ *\r
+ * NOTE 2: This file only contains the source code that is specific to the\r
+ * basic demo. Generic functions, such FreeRTOS hook functions, and functions\r
+ * required to configure the hardware, are defined in main.c.\r
+ ******************************************************************************\r
+ *\r
+ * main_blinky() creates one queue, two tasks, and one software timer. It then\r
+ * starts the scheduler.\r
+ *\r
+ * The Blinky Software Timer:\r
+ * This demonstrates an auto-reload software timer. The timer callback function\r
+ * does nothing but toggle an LED.\r
+ *\r
+ * The Queue Send Task:\r
+ * The queue send task is implemented by prvQueueSendTask() in main_blinky.c.\r
+ * prvQueueSendTask() repeatedly blocks for 200 milliseconds before sending the\r
+ * value 100 to the queue that was created in main_blinky().\r
+ *\r
+ * The Queue Receive Task:\r
+ * The queue receive task is implemented by prvQueueReceiveTask() in\r
+ * main_blinky.c. prvQueueReceiveTask() repeatedly blocks on attempts to read\r
+ * from the queue that was created in main_blinky(), toggling an LED each time\r
+ * data is received. The queue send task sends data to the queue every 200\r
+ * milliseconds, so the LED will toggle every 200 milliseconds.\r
+ */\r
+\r
+/* Standard includes. */\r
+#include <stdio.h>\r
+\r
+/* Kernel includes. */\r
+#include "FreeRTOS.h"\r
+#include "task.h"\r
+#include "queue.h"\r
+#include "timers.h"\r
+\r
+/* Priorities at which the tasks are created. */\r
+#define mainQUEUE_SEND_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )\r
+#define mainQUEUE_RECEIVE_TASK_PRIORITY ( tskIDLE_PRIORITY + 2 )\r
+\r
+/* The rate at which data is sent to the queue. The 200ms value is converted\r
+to ticks using the portTICK_PERIOD_MS constant. */\r
+#define mainQUEUE_SEND_FREQUENCY_MS ( 200 / portTICK_PERIOD_MS )\r
+\r
+/* The number of items the queue can hold. This is 1 as the receive task\r
+will remove items as they are added, meaning the send task should always find\r
+the queue empty. */\r
+#define mainQUEUE_LENGTH ( 1 )\r
+\r
+/* Values passed to the two tasks just to check the task parameter\r
+functionality. */\r
+#define mainQUEUE_SEND_PARAMETER ( 0x1111UL )\r
+#define mainQUEUE_RECEIVE_PARAMETER ( 0x22UL )\r
+\r
+/* The period of the blinky software timer. The period is specified in ms and\r
+converted to ticks using the portTICK_PERIOD_MS constant. */\r
+#define mainBLINKY_TIMER_PERIOD ( 50 / portTICK_PERIOD_MS )\r
+\r
+/* The LED used by the communicating tasks and the blinky timer respectively. */\r
+#define mainTASKS_LED ( 0 )\r
+#define mainTIMER_LED ( 1 )\r
+\r
+/* Misc. */\r
+#define mainDONT_BLOCK ( 0 )\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+/*\r
+ * The tasks as described in the comments at the top of this file.\r
+ */\r
+static void prvQueueReceiveTask( void *pvParameters );\r
+static void prvQueueSendTask( void *pvParameters );\r
+\r
+/*\r
+ * The callback function for the blinky software timer, as described at the top\r
+ * of this file.\r
+ */\r
+static void prvBlinkyTimerCallback( TimerHandle_t xTimer );\r
+\r
+/*\r
+ * Called by main() to create the simply blinky style application if\r
+ * mainCREATE_SIMPLE_BLINKY_DEMO_ONLY is set to 1.\r
+ */\r
+void main_blinky( void );\r
+\r
+/*\r
+ * LED toggle function that uses a critical section to ensure thread safety.\r
+ */\r
+extern void vToggleLED( uint8_t ucLED );\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+/* The queue used by both tasks. */\r
+static QueueHandle_t xQueue = NULL;\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+void main_blinky( void )\r
+{\r
+TimerHandle_t xTimer;\r
+\r
+ /* Create the queue. */\r
+ xQueue = xQueueCreate( mainQUEUE_LENGTH, sizeof( unsigned long ) );\r
+ configASSERT( xQueue );\r
+\r
+ if( xQueue != NULL )\r
+ {\r
+ /* Create the two tasks as described in the comments at the top of this\r
+ file. */\r
+ xTaskCreate( prvQueueReceiveTask, /* The function that implements the task. */\r
+ "Rx", /* The text name assigned to the task - for debug only as it is not used by the kernel. */\r
+ configMINIMAL_STACK_SIZE, /* The size of the stack to allocate to the task. */\r
+ ( void * ) mainQUEUE_RECEIVE_PARAMETER, /* The parameter passed to the task - just to check the functionality. */\r
+ mainQUEUE_RECEIVE_TASK_PRIORITY, /* The priority assigned to the task. */\r
+ NULL ); /* The task handle is not required, so NULL is passed. */\r
+\r
+ xTaskCreate( prvQueueSendTask, "TX", configMINIMAL_STACK_SIZE, ( void * ) mainQUEUE_SEND_PARAMETER, mainQUEUE_SEND_TASK_PRIORITY, NULL );\r
+\r
+\r
+ /* Create the blinky software timer as described at the top of this file. */\r
+ xTimer = xTimerCreate( "Blinky", /* A text name, purely to help debugging. */\r
+ ( mainBLINKY_TIMER_PERIOD ),/* The timer period. */\r
+ pdTRUE, /* This is an auto-reload timer, so xAutoReload is set to pdTRUE. */\r
+ ( void * ) 0, /* The ID is not used, so can be set to anything. */\r
+ prvBlinkyTimerCallback ); /* The callback function that inspects the status of all the other tasks. */\r
+ configASSERT( xTimer );\r
+\r
+ if( xTimer != NULL )\r
+ {\r
+ xTimerStart( xTimer, mainDONT_BLOCK );\r
+ }\r
+\r
+ /* Start the tasks and timer running. */\r
+ vTaskStartScheduler();\r
+ }\r
+\r
+ /* If all is well, the scheduler will now be running, and the following\r
+ line will never be reached. If the following line does execute, then\r
+ there was insufficient FreeRTOS heap memory available for the idle and/or\r
+ timer tasks to be created. See the memory management section on the\r
+ FreeRTOS web site for more details. http://www.freertos.org/a00111.html */\r
+ for( ;; );\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+static void prvQueueSendTask( void *pvParameters )\r
+{\r
+TickType_t xNextWakeTime;\r
+const unsigned long ulValueToSend = 100UL;\r
+\r
+ /* Remove compiler warnings in the case that configASSERT() is not defined. */\r
+ ( void ) pvParameters;\r
+\r
+ /* Check the task parameter is as expected. */\r
+ configASSERT( ( ( unsigned long ) pvParameters ) == mainQUEUE_SEND_PARAMETER );\r
+\r
+ /* Initialise xNextWakeTime - this only needs to be done once. */\r
+ xNextWakeTime = xTaskGetTickCount();\r
+\r
+ for( ;; )\r
+ {\r
+ /* Place this task in the blocked state until it is time to run again.\r
+ The block time is specified in ticks, the constant used converts ticks\r
+ to ms. While in the Blocked state this task will not consume any CPU\r
+ time. */\r
+ vTaskDelayUntil( &xNextWakeTime, mainQUEUE_SEND_FREQUENCY_MS );\r
+\r
+ /* Send to the queue - causing the queue receive task to unblock and\r
+ toggle the LED. 0 is used as the block time so the sending operation\r
+ will not block - it shouldn't need to block as the queue should always\r
+ be empty at this point in the code. */\r
+ xQueueSend( xQueue, &ulValueToSend, 0U );\r
+ }\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+static void prvQueueReceiveTask( void *pvParameters )\r
+{\r
+unsigned long ulReceivedValue;\r
+\r
+ /* Remove compiler warnings in the case where configASSERT() is not defined. */\r
+ ( void ) pvParameters;\r
+\r
+ /* Check the task parameter is as expected. */\r
+ configASSERT( ( ( unsigned long ) pvParameters ) == mainQUEUE_RECEIVE_PARAMETER );\r
+\r
+ for( ;; )\r
+ {\r
+ /* Wait until something arrives in the queue - this task will block\r
+ indefinitely provided INCLUDE_vTaskSuspend is set to 1 in\r
+ FreeRTOSConfig.h. */\r
+ xQueueReceive( xQueue, &ulReceivedValue, portMAX_DELAY );\r
+\r
+ /* To get here something must have been received from the queue, but\r
+ is it the expected value? If it is, toggle the LED. */\r
+ if( ulReceivedValue == 100UL )\r
+ {\r
+ vToggleLED( mainTASKS_LED );\r
+ ulReceivedValue = 0U;\r
+ }\r
+ }\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+static void prvBlinkyTimerCallback( TimerHandle_t xTimer )\r
+{\r
+ /* Avoid compiler warnings. */\r
+ ( void ) xTimer;\r
+\r
+ /* This function is called when the blinky software time expires. All the\r
+ function does is toggle the LED. LED mainTIMER_LED should therefore toggle\r
+ with the period set by mainBLINKY_TIMER_PERIOD. */\r
+ vToggleLED( mainTIMER_LED );\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
projects / freertos / blobdiff