AVR MCU LED Experiment-EEWORLD

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I bought an AVR128 development board online two days ago. It is really powerful and the online hardware simulation is super cool. The engineers on the website are very easy to talk to. If there is a problem, I will send a text message and call from Harbin to solve it immediately. The AVR port definition is a bit troublesome. I just came from 51 and I am not used to it. However, I know C programming and basically there is no problem.

This is a program to light up the LEDs one by one. It uses the WIN-GCC compiler.

#include 
#include 
#define F_CPU 7372800 /* The main frequency of the MCU is 7.3728MHz, used for the delay subroutine*/
#include 
#include 

#define delay_us(x) _delay_us(x) //AVR GCC delay function x(us)
#define delay_ms(x) _delay_ms(x) //AVR GCC delay function x(ms)


void main()
{   
    PORTA=0xff; //Close the digital tube port to avoid garbled characters on the digital tube
    PORTB=0xfe; //Set the output value of port PB
    DDRB=0xFF; //Define PB port as output mode
    unsigned char i;
 while(1)
 {   
    i=PORTB;
       for(i=0;i<8;i++)
   {  
    PORTB=PORTB<<1;
    delay_ms(500);
    }
    PORTB=0xff;
    delay_ms(500);
 }
}

Keywords：AVR Reference address：AVR MCU LED Experiment

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