First put the circuit diagram, pay attention to the selection of capacitors on both sides of the crystal oscillator, and pay attention to the resistance value between the LED and the voltage.
The program is: Note that you must include the pic.h file, you must first determine the size of _XTAL_FREQ before using the __delay_ms macro, and pay attention to the magical effect of LED=~LED.
/*
Function: Make the LED flash at a certain time interval
*/
#include #define _XTAL_FREQ 4000000UL //Oscillator frequency #define LED RC5 //Because the LED light is connected to the RC5 pin void main() { TRISC = 0x00; //Set all PORTC to output PORTC = 0xff; //Set the output of PORTC to 1 while(1) { LED=~LED; // Wonderful, one sentence realizes the flashing of the light. In the past, when I wrote it myself, I had to write it to turn on first, then delay, then turn it off, and then delay again. Here, one sentence solves it. __delay_ms(150); //This delay function is defined in the pic.h file. Before using it, you must first set the size of _XTAL_FREQ, the unit is Hz } }
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