超声波测距程序LCD液晶显示

1、超声波测距程序LCD液晶显示Hessen was revised in January 2021#include<>#include<>#define uint unsigned int#define uchar unsigned char#def ine NOP () _nop_ () ;_nop_ () ;_nop_ () ;_nop_ () ;/LCD 引脚sbit LCD_RS=P2"6;sbit LCD_RW=P2"5;sbit LCD_EN=P2-7;/超声波引脚sbit Tx=P3-3;触发控制信号输入Trigsbit Rx=P3-2;

2、回响信号输出Echouchar code table = Distance Test：”;LCD 第一行显示uchar temp_dis= " cm ;LCD 第二行long int t, distance;uchar cache 4 = 0, 0, 0, 0);/延时void delay(uint ms) (uint t;while(ms-) for(t=0;t<120;t+);/读LCD状态uchar read_lcd_state() (uchar state;LCD_RS=0;LCD_RW=1;LCD_EN=1;_nop_();state=P0;LCD_EN=0;_nop

3、_();return state;/忙等待void lcd_busy_wait() (while(readcd_state() & 0x80)=0x80);NOP ();/LCD写指令void 1cd_write_com(uchar com) (lcd_busy_wait();LCD_RS=O;RS为0时，写指令，RS为1时，写数据LCD_RW=0;P0二com;NOP ();LCD_EN=1;NOP ();LCD_EN=O;)/LCD写数据void lcd_write_data(uchar dat) (lcd_busy_wait();LCD_RS=1;LCD_RW=0;P0=dat;

4、NOP ();LCD_EN=1;NOP ();LCD_EN=0;)/LCD初始化void lcd_init()LCD_EN=0;Icd_write_com(0x38);lcd_write_com(OxOc);lcd_write_com(0x06);1,且光标加1lcd_write_com(0x01);/LCD显示模式设置/LCD显示开/关及光标设置当写一个字符后地址指针加显示清屏/设置液晶显示位置-void set_lcd_pos(uchar p) (lcd_write_com(p 0x80);)/液晶显示程序void lcd_print(uchar p,uchar *s,uint low)

5、uint num;set_lcd_pos(p);for(num=O;num<1ow;num+) (lcd_write_data(snumJ);delay(l);)void HC05_Init()(Tx=1;触发脉冲NOP() ;NOP() ；NOP() ;NOP();Tx= 0;distance =*t;距离计算void distance_convert(long int dat) (cacheE0=dat/1000;cachel=dat/100%10;cache2=dat/10%10;cache3=dat%10;temp_disO_=cacheLO_+，0* ;temp_disl=cachel：+'O'temp_dis2=cache2+, 0,;temp_dis4=cache3J+，0* ;)/主程序void main() lcd_init ();delay(5);TM0D=0xl9;EA=1;开总中断TRO=1;启动定时器EXO=1;开外部中断IT0=l;设置为下降沿中断方式while (1) (HC05_Init();di stance_convert(distance);lcd_print(0x01, table, 14);lcd_print(0x44, temp_dis, 8);外部中断0void in