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Problem with RGB LEDs in TIVA LaunchPad

HI guys,

I bought a new TIVA board and testing it I found a problem running the TivaWare "blinky" code. In code, they try to blink the green led from RGB led. When I run the code, the green led stays always in on state, same behavior with red led.  Only the blue led has blinked. Then I changed the code to blink all RGB leds, my result was only blue led blinking and the others still in on state all the time.  What can I do?

My code is below:

//*************** Blinky LED ***********************
int main(void) {


    volatile unsigned long ulLoop;
    SYSCTL_RCGC2_R = SYSCTL_RCGC2_GPIOF; // Enable the GPIO port
    ulLoop = SYSCTL_RCGC2_R; // Do a dummy read to insert a few cycles
    GPIO_PORTF_DIR_R = 0x0E; // In original code the value is 0x08
    GPIO_PORTF_DEN_R = 0x0E; //  In original code the value is 0x08


    while(1) // Loop forever
    {

        GPIO_PORTF_DATA_R |= 0x0E; //  In original code the value is 0x08
        for(ulLoop = 0; ulLoop < 200000; ulLoop++) { }
        GPIO_PORTF_DATA_R &= ~(0x0E); //  In original code the value is 0x08
        for(ulLoop = 0; ulLoop < 200000; ulLoop++) { }
    }


}