51单片机-跑马灯例子

#include "reg52.h"
#include "intrins.h"
#include <stdio.h>
typedef unsigned int u16;
typedef unsigned char u8;
typedef unsigned int uint;
typedef unsigned char uchar;
#define LED_PORT P2
#define SMG_A_DP_PORT P0
u8 gsmg_code[17] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07,
                    0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71};
void delayms(u16 ten_us)
{
    while (ten_us--)
        ;
}

sbit led1 = P2 ^ 3;
sfr LED = 0xA0;

void main()
{
    // led1 = 0;
    // u8 i = 0;
    // LED_PORT = ~0x01;
    // uchar aa = 0xfe;
    uchar aa = 0x7f;

    while (1)
    {
        LED = aa;
        delayms(50000);
        aa = _cror_(aa, 1);
        if (aa == 0xfe)
        {
            while (1)
            {
                LED = aa;
                delayms(50000);
                aa = _crol_(aa, 1);
                if (aa == 0x7f)
                {
                    break;
                }
            }
        }

        // aa = _crol_(aa, 1);

        // led1 = 0;
        // delayms(50000);
        // led1 = 1;
        // delayms(50000);
        // for (i = 0; i < 4; i++)
        // {
        //     led1 = 0;
        //     delayms(50000);
        //     led1 = 1;
        //     // LED_PORT = _crol_(LED_PORT, 2);
        //     // printf("LED_PORT = %x\n", LED_PORT)
        //     delayms(50000);
        // }
        // for (i = 0; i < 4; i++)
        // {
        //     // LED_PORT = _cror_(LED_PORT, 2);
        //     // printf("LED_PORT = %x\n", LED_PORT)
        //     delayms(50000);
        // }
        // SMG_A_DP_PORT = gsmg_code[0];
    }
}