44 lines
722 B
C
44 lines
722 B
C
#include <stdint.h>
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#include "tm4c123gh6pm.h"
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/**
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* main.c
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*/
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void GPIO_PORTF_Init(void);
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void SystickHandler(void);
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volatile uint32_t systick_count = 1;
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int main(void)
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{
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GPIO_PORTF_Init();
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NVIC_ST_RELOAD_R = 0x9C4;
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NVIC_ST_CURRENT_R = 0x0;
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//Enable Systick:
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// SYST_CSR = 0x00000111 -- 0x7
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NVIC_ST_CTRL_R = 0x7;
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while(1);
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}
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void SystickHandler(void)
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{
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systick_count++;
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if(systick_count==1000)
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{
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systick_count = 0;
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GPIO_PORTF_DATA_R ^= 0x2;
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}
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}
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void GPIO_PORTF_Init(void)
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{
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SYSCTL_RCGC2_R |= SYSCTL_RCGC2_GPIOF;
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GPIO_PORTF_DEN_R = 0x1F;
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GPIO_PORTF_PUR_R = 0x11;
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GPIO_PORTF_DIR_R = 0x0E;
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}
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