generated from PEG/EE690-EmSys-TiVA-Template
51 lines
1.1 KiB
C
51 lines
1.1 KiB
C
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include "tm4c123gh6pm.h"
|
|
|
|
void Systick_Handler(void);
|
|
void systickInit(void);
|
|
|
|
int main(void)
|
|
{
|
|
SYSCTL_RCGC2_R |= 0x00000020; /* enable clock to GPIOF */
|
|
GPIO_PORTF_LOCK_R = 0x4C4F434B; /* unlock commit register */
|
|
GPIO_PORTF_CR_R = 0x1F; /* make PORTF0 configurable */
|
|
GPIO_PORTF_DEN_R = 0x1E; /* set PORTF pins 4 pin */
|
|
GPIO_PORTF_DIR_R = 0x0E; /* set PORTF4 pin as input user switch pin */
|
|
GPIO_PORTF_PUR_R = 0x10; /* PORTF4 is pulled up */
|
|
|
|
GPIO_PORTF_IS_R = (~(1<<4));
|
|
GPIO_PORTF_IBE_R = (~(1<<4));
|
|
GPIO_PORTF_IEV_R = (~(1<<4));
|
|
GPIO_PORTF_IM_R = (1<<4);
|
|
NVIC_EN0_R |= (1<<30);
|
|
|
|
|
|
while(1)
|
|
{
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
void systickInit()
|
|
{
|
|
NVIC_ST_CURRENT_R = 0;
|
|
NVIC_ST_CTRL_R = 0x07;
|
|
NVIC_ST_RELOAD_R = 8000000;
|
|
}
|
|
|
|
void Systick_Handler()
|
|
{
|
|
systickInit();
|
|
if (GPIO_PORTF_DATA_R & 0x04) {
|
|
GPIO_PORTF_DATA_R &= ~0x04;
|
|
|
|
}
|
|
else {
|
|
GPIO_PORTF_DATA_R |= 0x04;
|
|
}
|
|
systickInit();
|
|
}
|