freertos_blinky.c

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/*
 * @brief FreeRTOS Blinky example
 *
 * @note
 * Copyright(C) NXP Semiconductors, 2012
 * All rights reserved.
 *
 * @par
 * Software that is described herein is for illustrative purposes only
 * which provides customers with programming information regarding the
 * LPC products.  This software is supplied "AS IS" without any warranties of
 * any kind, and NXP Semiconductors and its licensor disclaim any and
 * all warranties, express or implied, including all implied warranties of
 * merchantability, fitness for a particular purpose and non-infringement of
 * intellectual property rights.  NXP Semiconductors assumes no responsibility
 * or liability for the use of the software, conveys no license or rights under any
 * patent, copyright, mask work right, or any other intellectual property rights in
 * or to any products. NXP Semiconductors reserves the right to make changes
 * in the software without notification. NXP Semiconductors also makes no
 * representation or warranty that such application will be suitable for the
 * specified use without further testing or modification.
 *
 * @par
 * Permission to use, copy, modify, and distribute this software and its
 * documentation is hereby granted, under NXP Semiconductors' and its
 * licensor's relevant copyrights in the software, without fee, provided that it
 * is used in conjunction with NXP Semiconductors microcontrollers.  This
 * copyright, permission, and disclaimer notice must appear in all copies of
 * this code.
 */

#include "board.h"
#include "FreeRTOS.h"
#include "task.h"

/*****************************************************************************
 * Private types/enumerations/variables
 ****************************************************************************/

/*****************************************************************************
 * Public types/enumerations/variables
 ****************************************************************************/

/*****************************************************************************
 * Private functions
 ****************************************************************************/

/* Sets up system hardware */
static void prvSetupHardware(void)
{
 Board_Init();

 /* Initial LED0 state is off */
 Board_LED_Set(0, false);
}

/* LED1 toggle thread */
static portTASK_FUNCTION(vLEDTask1, pvParameters) {
 bool LedState = false;

 while (1) {
  Board_LED_Set(0, LedState);
  LedState = (bool) !LedState;

  /* About a 3Hz on/off toggle rate */
  vTaskDelay(configTICK_RATE_HZ / 6);
 }
}

/* LED2 toggle thread */
static portTASK_FUNCTION(vLEDTask2, pvParameters) {
 bool LedState = false;

 while (1) {
  Board_LED_Set(1, LedState);
  LedState = (bool) !LedState;

  /* About a 7Hz on/off toggle rate */
  vTaskDelay(configTICK_RATE_HZ / 14);
 }
}

/* UART (or output) thread */
static portTASK_FUNCTION(vUARTTask, pvParameters) {
 int tickCnt = 0;

 while (1) {
  DEBUGOUT("Tick: %d \r\n", tickCnt);
  tickCnt++;

  /* About a 1s delay here */
  vTaskDelay(configTICK_RATE_HZ);
 }
}

/*****************************************************************************
 * Public functions
 ****************************************************************************/

int main(void)
{
 prvSetupHardware();

 /* LED1 toggle thread */
 xTaskCreate(vLEDTask1, (signed char *) "vTaskLed1",
    configMINIMAL_STACK_SIZE, NULL, (tskIDLE_PRIORITY + 1UL),
    (xTaskHandle *) NULL);

 /* LED2 toggle thread */
 xTaskCreate(vLEDTask2, (signed char *) "vTaskLed2",
    configMINIMAL_STACK_SIZE, NULL, (tskIDLE_PRIORITY + 1UL),
    (xTaskHandle *) NULL);

 /* UART output thread, simply counts seconds */
 xTaskCreate(vUARTTask, (signed char *) "vTaskUart",
    configMINIMAL_STACK_SIZE, NULL, (tskIDLE_PRIORITY + 1UL),
    (xTaskHandle *) NULL);

 /* Start the scheduler */
 vTaskStartScheduler();

 /* Should never arrive here */
 return 1;
}