From a6163888f3c56123b1db313743c6147ba498732c Mon Sep 17 00:00:00 2001 From: Yuval Adam Date: Fri, 8 Aug 2014 14:42:07 +0300 Subject: Add third_party libs --- third_party/FreeRTOS/Demo/Common/Minimal/flash.c | 157 +++++++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 third_party/FreeRTOS/Demo/Common/Minimal/flash.c (limited to 'third_party/FreeRTOS/Demo/Common/Minimal/flash.c') diff --git a/third_party/FreeRTOS/Demo/Common/Minimal/flash.c b/third_party/FreeRTOS/Demo/Common/Minimal/flash.c new file mode 100644 index 0000000..fda5870 --- /dev/null +++ b/third_party/FreeRTOS/Demo/Common/Minimal/flash.c @@ -0,0 +1,157 @@ +/* + FreeRTOS V7.6.0 - Copyright (C) 2013 Real Time Engineers Ltd. + All rights reserved + + VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION. + + *************************************************************************** + * * + * FreeRTOS provides completely free yet professionally developed, * + * robust, strictly quality controlled, supported, and cross * + * platform software that has become a de facto standard. * + * * + * Help yourself get started quickly and support the FreeRTOS * + * project by purchasing a FreeRTOS tutorial book, reference * + * manual, or both from: http://www.FreeRTOS.org/Documentation * + * * + * Thank you! * + * * + *************************************************************************** + + This file is part of the FreeRTOS distribution. + + FreeRTOS is free software; you can redistribute it and/or modify it under + the terms of the GNU General Public License (version 2) as published by the + Free Software Foundation >>!AND MODIFIED BY!<< the FreeRTOS exception. + + >>! NOTE: The modification to the GPL is included to allow you to distribute + >>! a combined work that includes FreeRTOS without being obliged to provide + >>! the source code for proprietary components outside of the FreeRTOS + >>! kernel. + + FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + FOR A PARTICULAR PURPOSE. Full license text is available from the following + link: http://www.freertos.org/a00114.html + + 1 tab == 4 spaces! + + *************************************************************************** + * * + * Having a problem? Start by reading the FAQ "My application does * + * not run, what could be wrong?" * + * * + * http://www.FreeRTOS.org/FAQHelp.html * + * * + *************************************************************************** + + http://www.FreeRTOS.org - Documentation, books, training, latest versions, + license and Real Time Engineers Ltd. contact details. + + http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products, + including FreeRTOS+Trace - an indispensable productivity tool, a DOS + compatible FAT file system, and our tiny thread aware UDP/IP stack. + + http://www.OpenRTOS.com - Real Time Engineers ltd license FreeRTOS to High + Integrity Systems to sell under the OpenRTOS brand. Low cost OpenRTOS + licenses offer ticketed support, indemnification and middleware. + + http://www.SafeRTOS.com - High Integrity Systems also provide a safety + engineered and independently SIL3 certified version for use in safety and + mission critical applications that require provable dependability. + + 1 tab == 4 spaces! +*/ + +/** + * This version of flash .c is for use on systems that have limited stack space + * and no display facilities. The complete version can be found in the + * Demo/Common/Full directory. + * + * Three tasks are created, each of which flash an LED at a different rate. The first + * LED flashes every 200ms, the second every 400ms, the third every 600ms. + * + * The LED flash tasks provide instant visual feedback. They show that the scheduler + * is still operational. + * + */ + + +#include + +/* Scheduler include files. */ +#include "FreeRTOS.h" +#include "task.h" + +/* Demo program include files. */ +#include "partest.h" +#include "flash.h" + +#define ledSTACK_SIZE configMINIMAL_STACK_SIZE +#define ledNUMBER_OF_LEDS ( 3 ) +#define ledFLASH_RATE_BASE ( ( portTickType ) 333 ) + +/* Variable used by the created tasks to calculate the LED number to use, and +the rate at which they should flash the LED. */ +static volatile unsigned portBASE_TYPE uxFlashTaskNumber = 0; + +/* The task that is created three times. */ +static portTASK_FUNCTION_PROTO( vLEDFlashTask, pvParameters ); + +/*-----------------------------------------------------------*/ + +void vStartLEDFlashTasks( unsigned portBASE_TYPE uxPriority ) +{ +signed portBASE_TYPE xLEDTask; + + /* Create the three tasks. */ + for( xLEDTask = 0; xLEDTask < ledNUMBER_OF_LEDS; ++xLEDTask ) + { + /* Spawn the task. */ + xTaskCreate( vLEDFlashTask, ( signed char * ) "LEDx", ledSTACK_SIZE, NULL, uxPriority, ( xTaskHandle * ) NULL ); + } +} +/*-----------------------------------------------------------*/ + +static portTASK_FUNCTION( vLEDFlashTask, pvParameters ) +{ +portTickType xFlashRate, xLastFlashTime; +unsigned portBASE_TYPE uxLED; + + /* The parameters are not used. */ + ( void ) pvParameters; + + /* Calculate the LED and flash rate. */ + portENTER_CRITICAL(); + { + /* See which of the eight LED's we should use. */ + uxLED = uxFlashTaskNumber; + + /* Update so the next task uses the next LED. */ + uxFlashTaskNumber++; + } + portEXIT_CRITICAL(); + + xFlashRate = ledFLASH_RATE_BASE + ( ledFLASH_RATE_BASE * ( portTickType ) uxLED ); + xFlashRate /= portTICK_RATE_MS; + + /* We will turn the LED on and off again in the delay period, so each + delay is only half the total period. */ + xFlashRate /= ( portTickType ) 2; + + /* We need to initialise xLastFlashTime prior to the first call to + vTaskDelayUntil(). */ + xLastFlashTime = xTaskGetTickCount(); + + for(;;) + { + /* Delay for half the flash period then turn the LED on. */ + vTaskDelayUntil( &xLastFlashTime, xFlashRate ); + vParTestToggleLED( uxLED ); + + /* Delay for half the flash period then turn the LED off. */ + vTaskDelayUntil( &xLastFlashTime, xFlashRate ); + vParTestToggleLED( uxLED ); + } +} /*lint !e715 !e818 !e830 Function definition must be standard for task creation. */ + -- cgit v1.3.1