int main(void){ uint32_t status;
PortF_Init(); // initialize PF0 and PF4 and make them inputs
// make PF3-1 out (PF3-1 built-in LEDs)
while(1){
status = PortF_Input();
switch(status){ // switches are negative logic on PF0 and PF4
case 0x01: PortF_Output(BLUE); break; // SW1 pressed
case 0x10: PortF_Output(RED); break; // SW2 pressed
case 0x00: PortF_Output(GREEN); break; // both switches pressed
case 0x11: PortF_Output(0); break; // neither switch pressed
}
}
}
void GPIOPortD_Handler(void) {
PortF_Output(GPIO_PORTF_DATA_R ^= RED);
// PUSH
__asm("mov r2, #5");
// ACK INTERRUPT
GPIO_PORTD_ICR_R = 0x08;
}
int main(void){
SysTick_Init(); // initialize SysTick timer, see SysTick.c
Switch_Init(); // initialize PF0 and PF4 and make them inputs
EnableInterrupts(); // I=0
//__set_BASEPRI(5<<5);
while(1){
set_reg();
if(SW1){
elapsed = (before-NVIC_ST_CURRENT_R)&0x00FFFFFF;
SW1=0; // Mark it as read
PortF_Output(GPIO_PORTF_DATA_R | 0x04); // Turn Blue LED (PF2) ON
}
if (SW2){
elapsed = (before-NVIC_ST_CURRENT_R)&0x00FFFFFF;
SW2=0;
PortF_Output(0x00); // Turn Red LED (PF1) OFF
}
}
}
int main(void){
PLL_Init();
SYSCTL_RCGCGPIO_R |= 0x20; // activate port F
while((SYSCTL_PRGPIO_R&0x0020) == 0){};// ready?
GPIO_PORTF_DIR_R |= 0x04; // make PF2 out (PF2 built-in LED)
GPIO_PORTF_AFSEL_R &= ~0x04; // regular port function
GPIO_PORTF_DEN_R |= 0x04; // enable digital I/O on PF2
// configure PF4 as GPIO
GPIO_PORTF_PCTL_R = (GPIO_PORTF_PCTL_R&0xFFF0FFFF)+0x00000000;
GPIO_PORTF_AMSEL_R = 0; // disable analog functionality on PF
while(1){
status = GPIO_PORTF_DATA_R;
if( status & 0x04 ) {
PortF_Output(0);
} else {
PortF_Output(BLUE);
}
delay_asm(1000000);
//Delay(1000000); // delay ~0.5 sec at 80 MHz
}
}
