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/*
* Copyright (c) 2015, Freescale Semiconductor, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice, this list
* of conditions and the following disclaimer.
*
* o Redistributions in binary form must reproduce the above copyright notice, this
* list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* o Neither the name of Freescale Semiconductor, Inc. nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "FreeRTOS.h"
#include "task.h"
#include "board.h"
#include "debug_console_imx.h"
#include "gpio_ctrl.h"
#include "gpt_timer.h"
#define BLINKING_FREQ_MIN (100)
static volatile uint32_t blinkingInterval = BLINKING_FREQ_MIN;
/******************************************************************************
*
* Function Name: ToggleTask
* Comments: this task is used to turn toggle on/off LED.
*
******************************************************************************/
void ToggleTask(void *pvParameters)
{
while (true)
{
GPIO_Ctrl_ToggleLed();
/* Use GPT timer to get accurate delay */
GPT_Timer_Delay(blinkingInterval);
}
}
/******************************************************************************
*
* Function Name: SwitchTask
* Comments: this task is used to change blinking frequency.
*
******************************************************************************/
void SwitchTask(void *pvParameters)
{
while (true)
{
PRINTF("\n\r====== Blinking interval %dms ======\n\r", blinkingInterval);
GPIO_Ctrl_WaitKeyPressed();
blinkingInterval += 100;
if (blinkingInterval > 1000)
blinkingInterval = BLINKING_FREQ_MIN;
/* Delay for 1 second to avoid glitch */
vTaskDelay(configTICK_RATE_HZ);
}
}
/******************************************************************************
*
* Function Name: main
* Comments: main function, toggle LED and switch the blinking frequency by key.
*
******************************************************************************/
int main(void)
{
/* Initialize board specified hardware. */
hardware_init();
GPT_Timer_Init();
GPIO_Ctrl_Init();
PRINTF("\n\r================= Blinking Demo ==================\n\r");
/* Create a the APP main task. */
xTaskCreate(ToggleTask, "Toggle Task", configMINIMAL_STACK_SIZE,
NULL, tskIDLE_PRIORITY+1, NULL);
xTaskCreate(SwitchTask, "Switch Task", configMINIMAL_STACK_SIZE,
NULL, tskIDLE_PRIORITY+2, NULL);
/* Start FreeRTOS scheduler. */
vTaskStartScheduler();
/* should never reach this point. */
while (true);
}
/*******************************************************************************
* EOF
******************************************************************************/
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