99 lines
3.8 KiB
C
99 lines
3.8 KiB
C
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/*
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* FreeRTOS Kernel V10.2.1
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* Copyright (C) 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* http://www.FreeRTOS.org
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* http://aws.amazon.com/freertos
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*
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* 1 tab == 4 spaces!
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*/
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/**
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* Repeatedly toggles one or more LEDs using software timers - one timer per
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* LED.
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*/
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/* Scheduler include files. */
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#include "FreeRTOS.h"
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#include "timers.h"
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/* Demo program include files. */
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#include "partest.h"
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#include "flash_timer.h"
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/* The toggle rates are all a multple of ledFLASH_RATE_BASE. */
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#define ledFLASH_RATE_BASE ( ( ( TickType_t ) 333 ) / portTICK_PERIOD_MS )
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/* A block time of zero simple means "don't block". */
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#define ledDONT_BLOCK ( ( TickType_t ) 0 )
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/*-----------------------------------------------------------*/
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/*
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* The callback function used by each LED flashing timer. All the timers use
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* this function, and the timer ID is used within the function to determine
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* which timer has actually expired.
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*/
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static void prvLEDTimerCallback( TimerHandle_t xTimer );
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/*-----------------------------------------------------------*/
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void vStartLEDFlashTimers( UBaseType_t uxNumberOfLEDs )
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{
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UBaseType_t uxLEDTimer;
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TimerHandle_t xTimer;
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/* Create and start the requested number of timers. */
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for( uxLEDTimer = 0; uxLEDTimer < uxNumberOfLEDs; ++uxLEDTimer )
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{
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/* Create the timer. */
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xTimer = xTimerCreate( "Flasher", /* A text name, purely to help debugging. */
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ledFLASH_RATE_BASE * ( uxLEDTimer + 1 ),/* The timer period, which is a multiple of ledFLASH_RATE_BASE. */
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pdTRUE, /* This is an auto-reload timer, so xAutoReload is set to pdTRUE. */
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( void * ) uxLEDTimer, /* The ID is used to identify the timer within the timer callback function, as each timer uses the same callback. */
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prvLEDTimerCallback /* Each timer uses the same callback. */
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);
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/* If the timer was created successfully, attempt to start it. If the
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scheduler has not yet been started then the timer command queue must
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be long enough to hold each command sent to it until such time that the
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scheduler is started. The timer command queue length is set by
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configTIMER_QUEUE_LENGTH in FreeRTOSConfig.h. */
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if( xTimer != NULL )
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{
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xTimerStart( xTimer, ledDONT_BLOCK );
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}
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}
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}
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/*-----------------------------------------------------------*/
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static void prvLEDTimerCallback( TimerHandle_t xTimer )
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{
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BaseType_t xTimerID;
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/* The timer ID is used to identify the timer that has actually expired as
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each timer uses the same callback. The ID is then also used as the number
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of the LED that is to be toggled. */
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xTimerID = ( BaseType_t ) pvTimerGetTimerID( xTimer );
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vParTestToggleLED( xTimerID );
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}
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