View source for EK-TM4C123GXL Blinky Program

__NOTOC__
== EK-TM4C123GXL Blinky Program ==
<syntaxhighlight lang="c" line start="1">
/* 
Toggling LEDs using special function registers by their names defined in the TivaWare header file
Runs on TI EK-TM4C123GXl LaunchPad Board
*/


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

void delayMs(int n);

int main(void)
{
    SYSCTL_RCGC2_R |= 0x00000020;     /* enable clock to GPIOF at clock gating control register */

    GPIO_PORTF_DIR_R = 0x0E;          /* enable the GPIO pins for the LED (PF3, 2, 1) as output */
    GPIO_PORTF_DEN_R = 0x0E;         /* enable the GPIO pins for digital function */
   
    while(1) {
        GPIO_PORTF_DATA_R = 0x0E;     /* turn on all LEDs */
        delayMs(500);
        GPIO_PORTF_DATA_R = 0;        /* turn off all LEDs */
        delayMs(500);
    }
}

/* delay n milliseconds (16 MHz CPU clock) */
void delayMs(int n)
{
    int i, j;
    for(i = 0 ; i < n; i++)
        for(j = 0; j < 3180; j++) {}   /* do nothing for 1 ms */
}
</syntaxhighlight>

== See Also ==
# [[EmSys:Programming the GPIO in TM4C123 | TM4C123GH6PM GPIO Programming]]
# [[EmSys:Tiva C Series TM4C123GXL Board | EK-TM4C123GXL LaunchPad Board]]
# [[EmSys:Switch_Inputs_and_LED_Outputs_in_TM4C123 | Switch Inputs and LED Outputs in TM4C123]]