I'm new to LM4F120H5QR. I'm trying to generate an interrupt externally using a switch, but am not being able to do so.
This is a part of the code that i wrote for it.
void GPIOPortF_Handler(void)
{
blinky();//this blinks the blue led once
{
void int_init()
{ SYSCTL_RCGC2_R |= SYSCTL_RCGC2_GPIOF;
GPIO_PORTF_DIR_R &= ~0x10; // (c) make PF4 in (built-in button)
GPIO_PORTF_AFSEL_R &= ~0x10; // disable alt funct on PF4
GPIO_PORTF_DEN_R |= 0x10; // enable digital I/O on PF4
// configure PF4 as GPIO
GPIO_PORTF_PCTL_R = (GPIO_PORTF_PCTL_R&0xFFF0FFFF)+0x00000000;
GPIO_PORTF_AMSEL_R = 0; // disable analog functionality on PF
GPIO_PORTF_PUR_R |= 0x10; // enable weak pull-up on PF4
GPIO_PORTF_IS_R &= ~0x10; // PF4 is edge-sensitive
GPIO_PORTF_IBE_R &= ~0x10; // PF4 is not both edges
GPIO_PORTF_IEV_R &= ~0x10; // PF4 falling edge event
GPIO_PORTF_IM_R |= 0x10;
NVIC_EN0_R = NVIC_EN0_INT30;
}
int main(void){
int_init();
while(1){
}
}
Please help.
If anyone could provide a working code with comments it would help me to understand much better. thanks
