cpu.c

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#include "cpu.h"
 
 
 
void CLOCK_Init(void)
{
    PLL_Init(Bus80MHz);         // set processor clock to 50 MHz
}
 
 
 
void LED_Init(void)
{   
    SYSCTL_RCGCGPIO_R |= CLOCK_MASK_PORTF;                  // Enable Clock
    while((SYSCTL_PRGPIO_R & CLOCK_MASK_PORTF) != CLOCK_MASK_PORTF){};  // wait for clock to be enabled     
    GPIO_PORTF_LOCK_R = GPIO_LOCK_KEY;// 2a) unlock GPIO Port F Commit Register
    GPIO_PORTF_CR_R = LEDS;        // 2b) enable commit for PF0-PF3    
    GPIO_PORTF_AMSEL_R &= ~LEDS;   // 3) disable analog functionality on PF0-PF3     
    GPIO_PORTF_PCTL_R &= ~0x000FFFF;// 4) configure PF0-PF3 as GPIO
    GPIO_PORTF_DIR_R = LEDS;       // 5) make PF0-3 output                       
    GPIO_PORTF_AFSEL_R &= ~LEDS;        // 6) disable alt funct on PF0-PF3
    GPIO_PORTF_DEN_R = LEDS;       // 7) enable digital I/O on PF0-PF3
}