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//*****************************************************************************
//
// led_task.c - A simple flashing LED task.
//
// Copyright (c) 2009-2014 Texas Instruments Incorporated. All rights reserved.
// Software License Agreement
//
// Texas Instruments (TI) is supplying this software for use solely and
// exclusively on TI's microcontroller products. The software is owned by
// TI and/or its suppliers, and is protected under applicable copyright
// laws. You may not combine this software with "viral" open-source
// software in order to form a larger program.
//
// THIS SOFTWARE IS PROVIDED "AS IS" AND WITH ALL FAULTS.
// NO WARRANTIES, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING, BUT
// NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE APPLY TO THIS SOFTWARE. TI SHALL NOT, UNDER ANY
// CIRCUMSTANCES, BE LIABLE FOR SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
// DAMAGES, FOR ANY REASON WHATSOEVER.
//
// This is part of revision 2.1.0.12573 of the DK-TM4C129X Firmware Package.
//
//*****************************************************************************
#include <stdint.h>
#include <stdbool.h>
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/gpio.h"
#include "driverlib/rom.h"
#include "idle_task.h"
#include "led_task.h"
#include "priorities.h"
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "semphr.h"
//*****************************************************************************
//
// The stack size for the LED toggle task.
//
//*****************************************************************************
#define STACKSIZE_LEDTASK 128
//*****************************************************************************
//
// The amount of time to delay between toggles of the LED.
//
//*****************************************************************************
uint32_t g_ui32LEDDelay = 500;
//*****************************************************************************
//
// This task simply toggles the user LED at a 1 Hz rate.
//
//*****************************************************************************
static void
LEDTask(void *pvParameters)
{
portTickType ui32LastTime;
//
// Get the current tick count.
//
ui32LastTime = xTaskGetTickCount();
//
// Loop forever.
//
while(1)
{
//
// Turn on the user LED.
//
ROM_GPIOPinWrite(GPIO_PORTQ_BASE, GPIO_PIN_7, GPIO_PIN_7);
//
// Wait for the required amount of time.
//
vTaskDelayUntil(&ui32LastTime, g_ui32LEDDelay / portTICK_RATE_MS);
//
// Turn off the user LED.
//
ROM_GPIOPinWrite(GPIO_PORTQ_BASE, GPIO_PIN_7, 0);
//
// Wait for the required amount of time.
//
vTaskDelayUntil(&ui32LastTime, g_ui32LEDDelay / portTICK_RATE_MS);
}
}
//*****************************************************************************
//
// Initializes the LED task.
//
//*****************************************************************************
uint32_t
LEDTaskInit(void)
{
//
// Initialize the GPIO used to drive the user LED.
//
ROM_GPIOPinTypeGPIOOutput(GPIO_PORTQ_BASE, GPIO_PIN_7);
//
// Create the LED task.
//
if(xTaskCreate(LEDTask, (signed portCHAR *)"LED", STACKSIZE_LEDTASK, NULL,
tskIDLE_PRIORITY + PRIORITY_LED_TASK, NULL) != pdTRUE)
{
return(1);
}
//
// Success.
//
return(0);
}
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