哪位大佬知道我这个单片机程序为什么现象总是错的啊?

ID:834174 · 发表于 2020-10-25 02:03

#include <reg52.h>
#include<intrins.h>
//#define _nop() _asm nop _endasm
typedef unsigned char uchar;
typedef unsigned int uint;
sbit RX = P2^0;//接收
sbit TX = P2^1;//发射
uchar flag;
uchar date_distance[5];//距离
uchar kk;
sbit duan = P2^6;//段选
sbit wei = P2^7;//位选
uchar duan1[] = {0X3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};
uchar wei1 [] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
// void delay_10us(uchar i)
// {
// while(i--);
// }
void delay_ms(uint c)
{
uint a,b;
for(;c>0;c--)
for(b=102;b>0;b--)
for(a=3;a>0;a--);
}
void init_wei(uchar i)
{
P0 = 0xff;
wei = 1;
P0 = wei1[i] ;
wei = 0;
}
void init_timer()// 定时器初始化
{
TMOD = 0X11;// 定义定时器定时类型
TH0 = 0x00;// 定时器0高位
TL0 = 0x00;// 定时器0低位
EA = 1;// 单片机中断总开关
ET0 = 1;// 允许T0溢出中断
TH1 = 0xf8;// 定时器1高位
TL1 = 0xCD;// 定时器1低位
ET1 = 1;// 允许T1溢出中断
TR1 = 1;// 定时器1的运行控制位
}
void count_distance()// 距离数
{
uint distance = (TH0*256+TL0*1)*0.18;// 通过时间算距离
TH0 = 0;
TL0 = 0;
// 计时器归零
if(distance>=4000||distance < 20)
{
flag = 1;
}
else
{
date_distance[1] = distance%10000/1000;
date_distance[2] = distance%1000/100;
date_distance[3] = distance%100/10;
date_distance[4] = distance%10/1;
}
}
void display()// 显示
{
uchar i;
if(flag==1)
{
flag = 0;
date_distance[1] = 14;
date_distance[2] = 14;
date_distance[3] = 14;
date_distance[4] = 14;
}
count_distance();
for(i = 1;i<=4;i++)
{
init_wei(i);
duan = 1;
if(i==1)
P0 = duan1[date_distance[i]]|0x80;
else
P0 =duan1[date_distance[i]];
delay_ms(1);
duan = 0;
P0 = 0x00;
}
}
void main()
{
RX = 0;
TX=0;
init_timer();//定时器初始化
while(1)
{
TR1=1;
while(!RX);// 收到信号RX为零
TR0 = 1;
while(RX);
TR0 = 0;
count_distance();
}
}
void timer0() interrupt 1
{
flag = 1;
}
void timer1() interrupt 3
{
TR1 = 0;
TH1 = 0xf8;
// 0xf8;
TL1 = 0xcd;
// 0xcd;
kk ++;
display();
if(kk>100)
{
kk = 0;
TX = 1;
_nop_();_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();_nop_();
_nop_();_nop_();_nop_();_nop_();
TX = 0;
}
TR1 = 1;
}