标题:
用proteus仿真基于51单片机的倒车雷达 LCD没显示是什么情况呀 求帮助
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作者:
xb10230808lyn
时间:
2019-6-28 14:44
标题:
用proteus仿真基于51单片机的倒车雷达 LCD没显示是什么情况呀 求帮助
微信图片_20190628144304.png
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2019-6-28 14:46 上传
单片机源程序如下:
#include<stc15f2k60s2.h>
#include<intrins.h>
#include"lcd.h"
sbit Trig = P3^2;
sbit Echo = P3^3;
sbit beep=P1^4;
unsigned char PuZh[]="distance is ";
unsigned char code ASCII[15] = {'0','1','2','3','4','5','6','7','8','9','.','-','M'};
static unsigned char DisNum = 0;
unsigned int time=0;
unsigned long S=0;
bit flag =0;
unsigned char disbuff[4] ={ 0,0,0,0,};
void Conut(void)
{
time=TH0*256+TL0;
TH0=0;
TL0=0;
S=(time*1.7)/100;
if((S>=700)||flag==1)
{
flag=0;
DisplayOneChar(11, 0, ASCII[11]);
DisplayOneChar(12, 0, ASCII[10]);
DisplayOneChar(13, 0, ASCII[11]);
DisplayOneChar(14, 0, ASCII[11]);
DisplayOneChar(15, 0, ASCII[12]);
}
else
{
disbuff[0]=S%1000/100;
disbuff[1]=S%1000%100/10;
disbuff[2]=S%1000%10 %10;
DisplayOneChar(11, 0, ASCII[disbuff[0]]);
DisplayOneChar(12, 0, ASCII[10]);
DisplayOneChar(13, 0, ASCII[disbuff[1]]);
DisplayOneChar(14, 0, ASCII[disbuff[2]]);
DisplayOneChar(15, 0, ASCII[12]);
}
}
void zd0() interrupt 1
{
flag=1;
}
void StartModule()
{
Trig=1;
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
Trig=0;
}
void delayms(unsigned int ms)
{
unsigned char i=100,j;
for(;ms;ms--)
{
while(--i)
{
j=10;
while(--j);
}
}
}
void main(void)
{
TMOD=0x01;
TH0=0;
TL0=0;
ET0=1;
EA=1;
InitLcd1602();
LcdShowStr(0,0,PuZh);
while(1)
{
StartModule();
while(!Echo);
TR0=1;
while(Echo);
TR0=0;
Conut();
delayms(80);
if(S<20)
{
beep=0;
}
}
}
#include"lcd.h"
void Read_Busy()
{
unsigned char sta;
LCD1602_DB = 0xff;
LCD1602_RS = 0;
LCD1602_RW = 1;
do
{
LCD1602_EN = 1;
sta = LCD1602_DB;
LCD1602_EN = 0;
}while(sta & 0x80);
}
void Lcd1602_Write_Cmd(unsigned char cmd)
{
Read_Busy();
LCD1602_RS = 0;
LCD1602_RW = 0;
LCD1602_DB = cmd;
LCD1602_EN = 1;
LCD1602_EN = 0;
}
void Lcd1602_Write_Data(unsigned char dat)
{
Read_Busy();
LCD1602_RS = 1;
LCD1602_RW = 0;
LCD1602_DB = dat;
LCD1602_EN = 1;
LCD1602_EN = 0;
}
void LcdSetCursor(unsigned char x,unsigned char y)
{
unsigned char addr;
if(y == 0)
addr = 0x00 + x;
else
addr = 0x40+ x;
Lcd1602_Write_Cmd(addr|0x80);
}
//°′???¨??????ê?ò???×?
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
{
Y &= 0x1;
X &= 0xF;
if (Y) X |= 0x40;
X |= 0x80;
Lcd1602_Write_Cmd(X);
Lcd1602_Write_Data(DData);
}
void LcdShowStr(unsigned char x,unsigned char y,unsigned char *str)
{
LcdSetCursor(x,y);
while(*str != '\0')
{
Lcd1602_Write_Data(*str++);
}
}
void InitLcd1602()
{
Lcd1602_Write_Cmd(0x38);
Lcd1602_Write_Cmd(0x0c);
Lcd1602_Write_Cmd(0x06);
Lcd1602_Write_Cmd(0x01);
}
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