RGB Blink

main.c

/*
 * main.c
 *
 *  Created on: 13 Feb 2019
 *      Author: tedy.saputro
 */


#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include "inc/hw_types.h"
#include "inc/hw_memmap.h"
#include "driverlib/sysctl.h"
#include "driverlib/gpio.h"

/*

* Function Name: setup()

* Input: none

* Output: none

* Description: Set crystal frequency and enable GPIO Peripherals

* Example Call: setup();

*/
void setup(void)
{
    SysCtlClockSet(SYSCTL_SYSDIV_4|SYSCTL_USE_PLL|SYSCTL_XTAL_16MHZ|SYSCTL_OSC_MAIN);
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
}

/*

* Function Name: led_pin_config()

* Input: none

* Output: none

* Description: Set PORTF Pin 1, Pin 2, Pin 3 as output. On this pin Red, Blue and Green LEDs are connected.

* Example Call: led_pin_config();

*/

void led_pin_config(void)
{
    GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3);
}


int main(void)
{
    uint8_t ui8LED = 2;

    setup();
    led_pin_config();

    while(1)
    {
        // Turn on the LED
        GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_1|GPIO_PIN_2|GPIO_PIN_3, ui8LED);
        // Delay for a bit
        SysCtlDelay(20000000);
        // Cycle through Red, Green and Blue LEDs
        if (ui8LED == 8)
        {
            ui8LED = 2;
        }
        else
        {
            ui8LED = ui8LED*2;
        }
    }
}