TIVA C GREEN LED TOGGLE

(TIVA C TM4C123GH6PMI) 

Dr. C. A. Hernandez-Gutierrez

--------------------------------------------------------------------------------------------------------------------------

This code simply initiates the F port and turns the green LED  on and off. Where the LED is connected to terminal 3 of port F or PF3.

Any question let me know.
If you want help with a project, a course or consultancy please contact me.
--------------------------------------------------------------------------------------------------------------------------

#define GPIO_PORTF_DATA_R       (*((volatile unsigned long *)0x400253FC))
#define GPIO_PORTF_DIR_R        (*((volatile unsigned long *)0x40025400))
#define GPIO_PORTF_AFSEL_R      (*((volatile unsigned long *)0x40025420))
#define GPIO_PORTF_PUR_R        (*((volatile unsigned long *)0x40025510))
#define GPIO_PORTF_DEN_R        (*((volatile unsigned long *)0x4002551C))
#define GPIO_PORTF_LOCK_R       (*((volatile unsigned long *)0x40025520))
#define GPIO_PORTF_CR_R         (*((volatile unsigned long *)0x40025524))
#define GPIO_PORTF_AMSEL_R      (*((volatile unsigned long *)0x40025528))
#define GPIO_PORTF_PCTL_R       (*((volatile unsigned long *)0x4002552C))
#define SYSCTL_RCGC2_R          (*((volatile unsigned long *)0x400FE108))


void PortF_Init(void);

int main()
{
PortF_Init();

while(1)
{
GPIO_PORTF_DATA_R |= 0x08;
GPIO_PORTF_DATA_R &= ~0x08;
}
}


void PortF_Init(void){ 
volatile unsigned long delay;
  SYSCTL_RCGC2_R |= 0x00000020;     // 1) F clock
  delay = SYSCTL_RCGC2_R;           // delay   
  GPIO_PORTF_LOCK_R = 0x4C4F434B;   // 2) unlock PortF PF0  
  GPIO_PORTF_CR_R |= 0x1F;           // allow changes to PF4-0       
  GPIO_PORTF_AMSEL_R &= 0x00;        // 3) disable analog function
  GPIO_PORTF_PCTL_R &= 0x00000000;   // 4) GPIO clear bit PCTL  
  GPIO_PORTF_DIR_R &= ~0x11;          // 5.1) PF4,PF0 input, 
  GPIO_PORTF_DIR_R |= 0x08;          // 5.2) PF3 output  
  GPIO_PORTF_AFSEL_R &= 0x00;        // 6) no alternate function
  GPIO_PORTF_PUR_R |= 0x11;          // enable pullup resistors on PF4,PF0       
  GPIO_PORTF_DEN_R |= 0x1F;          // 7) enable digital pins PF4-PF0        
}