blinky.c File Reference

#include <stdint.h>
#include "inc/tm4c123gh6pm.h"

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Functions
int	main (void)

Function Documentation

int main

(

void

)

Definition at line 45 of file blinky.c.

References GPIO_PORTF_DATA_R, GPIO_PORTF_DEN_R, GPIO_PORTF_DIR_R, SYSCTL_RCGC2_GPIOF, and SYSCTL_RCGC2_R.

Referenced by Reset_Handler().

{
    volatile uint32_t ui32Loop;

    //
    // Enable the GPIO port that is used for the on-board LED.
    //
    SYSCTL_RCGC2_R = SYSCTL_RCGC2_GPIOF;

    //
    // Do a dummy read to insert a few cycles after enabling the peripheral.
    //
    ui32Loop = SYSCTL_RCGC2_R;

    //
    // Enable the GPIO pin for the LED (PF3).  Set the direction as output, and
    // enable the GPIO pin for digital function.
    //
    GPIO_PORTF_DIR_R = 0x08;
    GPIO_PORTF_DEN_R = 0x08;

    //
    // Loop forever.
    //
    while(1)
    {
        //
        // Turn on the LED.
        //
        GPIO_PORTF_DATA_R |= 0x08;

        //
        // Delay for a bit.
        //
        for(ui32Loop = 0; ui32Loop < 200000; ui32Loop++)
        {
        }

        //
        // Turn off the LED.
        //
        GPIO_PORTF_DATA_R &= ~(0x08);

        //
        // Delay for a bit.
        //
        for(ui32Loop = 0; ui32Loop < 200000; ui32Loop++)
        {
        }
    }
}

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