boards/ek-lm4f120xl/skeleton/skeleton.c


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#include "inc/hw_types.h"
#include "inc/hw_memmap.h"
#include "driverlib/sysctl.h"
#include "driverlib/gpio.h"

#define RED_LED   GPIO_PIN_1
#define BLUE_LED  GPIO_PIN_2
#define GREEN_LED GPIO_PIN_3

int main(void)
{
    SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_XTAL_16MHZ | SYSCTL_OSC_MAIN);
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
    GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, RED_LED | BLUE_LED | GREEN_LED);

    while(1)
    {
        GPIOPinWrite(GPIO_PORTF_BASE, RED_LED | BLUE_LED | GREEN_LED, RED_LED);
        SysCtlDelay(2000000);
        GPIOPinWrite(GPIO_PORTF_BASE, RED_LED | BLUE_LED | GREEN_LED, BLUE_LED);
        SysCtlDelay(2000000);
    }
}