--- /dev/null
+/*\r
+ FreeRTOS V9.0.0rc1 - Copyright (C) 2016 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 demo\r
+ * that demonstrates tickless low power operation, and a more comprehensive\r
+ * test and demo application. The configCREATE_LOW_POWER_DEMO setting in\r
+ * FreeRTOSConfig.h is used to select between the two, and to select the clock\r
+ * used when tickless low power operation is demonstrated. See the notes on\r
+ * using configCREATE_LOW_POWER_DEMO in main.c. This file implements the low\r
+ * power version.\r
+ *\r
+ * NOTE 2: This file only contains the source code that is specific to the\r
+ * low power demo. Generic functions, such FreeRTOS hook functions, and\r
+ * functions required to configure the hardware are defined in main.c.\r
+ ******************************************************************************\r
+ *\r
+ * main_low_power() creates one queue, and two tasks. It then starts the\r
+ * scheduler.\r
+ *\r
+ * The Queue Send Task:\r
+ * The queue send task is implemented by the prvQueueSendTask() function in\r
+ * this file. It sends the value 100 to the queue every second.\r
+ *\r
+ * The Queue Receive Task:\r
+ * The queue receive task is implemented by the prvQueueReceiveTask() function\r
+ * in this file. prvQueueReceiveTask() blocks on the queue, blipping (quickly\r
+ * turn on then off again) the LED each time it received the value 100 from the\r
+ * queue send task. The queue send task writes to the queue every second, so\r
+ * the LED will blip once a second.\r
+ *\r
+ * The RTOS tick is turned off when the queue send task and queue receive task\r
+ * are both in the Blocked state.\r
+ *\r
+ */\r
+\r
+\r
+/* Kernel includes. */\r
+#include "FreeRTOS.h"\r
+#include "task.h"\r
+#include "semphr.h"\r
+\r
+/* SiLabs includes. */\r
+#include "bsp.h"\r
+\r
+/* Priorities at which the tasks are created. */\r
+#define mainQUEUE_RECEIVE_TASK_PRIORITY ( tskIDLE_PRIORITY + 2 )\r
+#define mainQUEUE_SEND_TASK_PRIORITY ( tskIDLE_PRIORITY + 1 )\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 pdMS_TO_TICKS( 1000 )\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
+/* The LED toggled by the Rx task. */\r
+#define mainTASK_LED ( 0 )\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+/*\r
+ * Called by main when mainCREATE_LOW_POWER_DEMO is set to 1 in\r
+ * main.c.\r
+ */\r
+void main_low_power( void );\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
+\r
+/* The queue used by both tasks. */\r
+static QueueHandle_t xQueue = NULL;\r
+\r
+/*-----------------------------------------------------------*/\r
+\r
+void main_low_power( void )\r
+{\r
+ /* Create the queue. */\r
+ xQueue = xQueueCreate( mainQUEUE_LENGTH, sizeof( uint32_t ) );\r
+\r
+ if( xQueue != NULL )\r
+ {\r
+ /* Start 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
+ NULL, /* The parameter passed to the task - not used in this case. */\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, NULL, mainQUEUE_SEND_TASK_PRIORITY, NULL );\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 on the FreeRTOS heap\r
+ http://www.freertos.org/a00111.html. */\r
+ for( ;; );\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
+static void prvQueueSendTask( void *pvParameters )\r
+{\r
+TickType_t xNextWakeTime;\r
+const uint32_t ulValueToSend = 100UL;\r
+\r
+ /* Remove compiler warning about unused parameter. */\r
+ ( void ) pvParameters;\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
+ 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
+uint32_t ulReceivedValue;\r
+const uint32_t ulExpectedValue = 100UL;\r
+const TickType_t xShortDelay = pdMS_TO_TICKS( 10 );\r
+\r
+ /* Remove compiler warning about unused parameter. */\r
+ ( void ) pvParameters;\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 == ulExpectedValue )\r
+ {\r
+ /* Turn the LED on for a brief time only so it doens't distort the\r
+ energy reading. */\r
+ BSP_LedSet( mainTASK_LED );\r
+ vTaskDelay( xShortDelay );\r
+ BSP_LedClear( mainTASK_LED );\r
+ ulReceivedValue = 0U;\r
+ }\r
+ }\r
+}\r
+/*-----------------------------------------------------------*/\r
+\r
projects / freertos / blobdiff