69 lines
1.6 KiB
C
Executable File
69 lines
1.6 KiB
C
Executable File
#include <stdio.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include "TM4C123GH6PM.h"
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void initGPIO(void);
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void Delay(int t);
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int main(void)
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{
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initGPIO();
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int sample = 0x00;
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for(;;){
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sample = GPIOF -> DATA;
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//SWITCH ONE ON
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if(!(sample & 0x10)){
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GPIOF -> DATA |= 0x02;
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Delay(2000);
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GPIOF -> DATA &= 0xFD;
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}
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//SWITCH TWO ON
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if(!(sample & 0x01)){
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GPIOF -> DATA |= 0x08;
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Delay(2000);
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GPIOF -> DATA &= 0xF7;
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}
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}
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}
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void initGPIO(void){
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// GPIO Configuration
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// 1. Enable Clock on GPIOF[3:1] (SYSCTL_RCGCGPIO)
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SYSCTL->RCGCGPIO = 0x20;
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// allow time for clock to stabilize (SYSCTL_PRGPIO)
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while((SYSCTL->PRGPIO & 0x20) != 0x20){};
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// 2. Unlock GPIOC[3:0], GIOD[7] and GPIOF[0] on TM4C123G (GPIOn->LOCK and GPIOn->CR) NOT USING
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GPIOF->LOCK = 0x4C4F434B;
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GPIOF->CR |= 0x01;
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// 3. Clear AMSEL to disable analog
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GPIOF->AMSEL = 0x00;
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// 4. Config PCTL to select GPIO
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GPIOF->PCTL = 0x0000;
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//or
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//GPIOF->PCTL &= 0xFFF00FFF;
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// 5. Set DIR to 0 for input, 1 for output
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GPIOF->DIR = 0x0E; // PF3,PF2,PF1 for Output
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// 6. Enable AFSEL bits to 1
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GPIOF->AFSEL = 0x00;
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// 7. Set PUR bits to 1 to enable internal pull-up
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GPIOF->PUR = 0x11;
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// 8. Set DEN bits to 1 to enable data pins
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GPIOF->DEN = 0x1F; // Enable digital pin on PF3,PF2,PF1
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}
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void Delay(int t)
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{
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volatile int i, j;
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for (i = 0; i < t; i++)
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for (j = 0; j < 3180; j++)
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{};
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}
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