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33 lines
1.0 KiB
C
33 lines
1.0 KiB
C
#include "tm4c.h" // the same as "lm4f120h5qr.h" in the video
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/*
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#define SYSCTL_RCGCGPIO_R (*((unsigned int *)0x400FE608U))
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#define GPIO_PORTF_BASE 0x40025000U
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#define GPIO_PORTF_DIR_R (*((unsigned int *)(GPIO_PORTF_BASE + 0x400U)))
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#define GPIO_PORTF_DEN_R (*((unsigned int *)(GPIO_PORTF_BASE + 0x51CU)))
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#define GPIO_PORTF_DATA_R (*((unsigned int *)(GPIO_PORTF_BASE + 0x3FCU)))
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*/
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int main(void) {
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SYSCTL_RCGCGPIO_R = 0x20U; // enable clock for GPIOF
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GPIO_PORTF_DIR_R = 0x0EU; // set pins 1,2, and 3 as outputs
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GPIO_PORTF_DEN_R = 0x0EU; // enable digital function on pins 1,2, and 3
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while (1) { // endless loop
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GPIO_PORTF_DATA_R = 0x02U; // turn the red-LED on
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int volatile counter = 0;
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while (counter < 1000000) { // delay loop
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++counter;
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}
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GPIO_PORTF_DATA_R = 0x00U; // turn the red-LED off
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counter = 0;
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while (counter < 1000000) { // delay loop
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++counter;
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}
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}
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//return 0; // unreachable code
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}
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