yao.c

基于8051单片机的摇棒系统

/******************************/
//        ---------------
//          LED显示摇棒
//        ---------------
/******************************/
#include <reg51.h>
#define SEG 17        //每幅图片分成17列来显示
#define INTERVAL 20    //每幅图片在左右摇摆20
//次后换下一幅

typedef unsigned char uchar;
typedef unsigned int uint;

code char pattern[17][3]={    //3幅图片的字模
{0xff,0xff,0xff}, //在长沙的时候教过你怎么算，所以我就不多说了
{0xff,0xff,0xff},
{0xff,0xff,0xff},
{0xff,0xf9,0xff},
{0xff,0xf6,0x9f},
{0xff,0xee,0xa6},
{0xfe,0xdd,0x78},
{0x7e,0xbb,0x7f},
{0x00,0x77,0x7f},
{0x7e,0xbb,0x7f},
{0xfe,0xdd,0x78},
{0xff,0xee,0xa6},
{0xff,0xf6,0x9f},
{0xff,0xf9,0xff},
{0xff,0xff,0xff},
{0xff,0xff,0xff},
{0xff,0xff,0xff}, 
/*{0xff,0xff,0xff},//这是我注释掉的图片，你可以自己写了看看，到底是什么
{0xff,0xff,0xff},
{0xff,0xff,0xff},
{0xff,0xf9,0xe7},
{0xff,0xf6,0xdb},
{0xff,0xee,0xbd},
{0xfe,0xdd,0xd7},
{0x7e,0xbb,0x5a},
{0x00,0x77,0xd7},
{0x7e,0xbb,0x5a},
{0xfe,0xdd,0xff},
{0xff,0xee,0xbd},
{0xff,0xf6,0xdb},
{0xff,0xf9,0xe7},
{0xff,0xff,0xff},
{0xff,0xff,0xff},
{0xff,0xff,0xff}, */
};
uchar phase,th1,tl1,index,count;

/*注释1*/
/*51共有4个中断，两个外部中断，两个内部时钟中断分别又相应的寄存器控制其是否有效*/
/*四个中断又有优先级别之分，也有不同的寄存器控制*/

main()
{
    EA=0;     //中断总使能，高电平有效，他为高时，各中断自行使能，他为低，中断无效
    EX1=1;    //外部中断1使能，高电平有效
    ET1=1;    //内部时钟中断1使能，高有效
    PX0=1;    //外部中断优先级别设置
    IT1=1;    //外部中段1工作模式选择，为1是下降沿为中断信号，0时低电平为中断信号
    TMOD=0x11;//内部时钟中断模式设定，共有三种模式，不同模式，产生中断的时间长短的最大值有不同，
    //工作状态也不同，这里采用的是模式3
    index=0;
    EA=1;     //初始化完成，中断使能，程序有此时正式开始处理
    while(1)
    {
    }
}

void Int0_Handle(void) interrupt 2 using 2
{
    uint t0_time;
    TR0=0;
    TR1=0;
    TF1=0;
        t0_time=TH0<<8|TL0;
    TL0=0;
    TH0=0;
    TR0=1;
    t0_time=65535-t0_time/SEG;
    th1=t0_time/256;
    TH1=th1;
    tl1=t0_time % 256;
    TL1=tl1;
    if (count<3*INTERVAL){        //3幅图片循环
        count++;
    }
    else{
        count=0;
    }
    index=count/INTERVAL;
    if (th1!=0xff || tl1!=0xff){    //如果摆动特别慢，
//定时器溢出就不显示
        phase=0;
        TR1=1;
    }
    else{
        TR1=0;
    }
}

void Timer1(void) interrupt 3 using 3
{
    if (phase<SEG)            //17段依次显示
    {
        P0=pattern[phase][index];
        phase++;
        TH1=th1;
        TL1=tl1;
    }
}