1602LCD显示温湿度、超声波测距和烟雾浓度，但是显示不出来，求大神们帮忙看看 -

#include <reg52.h>
#include<intrins.h>
typedef unsigned int u16; //对数据类型进行声明定义
typedef unsigned char u8;
sbit rs = P0 ^ 4; //LCD管脚
sbit rw = P0 ^ 3;
sbit e = P0 ^ 2;
sbit trig=P1^4; //超声波管脚
sbit echo=P1^5;int i=0;
unsigned char code ASCII[15] = {'0','1','2','3','4','5','6','7','8','9','.','-','M'};
u8 num[16]=' ';
u8 yw[16]=' ';
bit state; //读状态标志位
u16 dis; //距离放在这里
unsigned char code cmd[9] = {0xFF, 0x01, 0x86, 0x00, 0x00, 0x00, 0x00, 0x00, 0x79};
unsigned char buf[9] = {0};
unsigned char nub = 0;
unsigned int value = 0;
unsigned char flag = 1;
unsigned char w;
sbit P2_0 = P2^0;
bit nug;
unsigned char shidu_int;
unsigned char shidu_point;
unsigned char tem_int;
unsigned char tem_point;
unsigned char check;
unsigned char self_check;
bit state;
void delay5ms() //@11.0592MHz**************************延时函数
{
u8 i, j;
i = 9;
j = 244;
do
{
while (--j);
} while (--i);
}
void delay15ms() //@11.0592MHz
{
u8 i, j;
i = 27;
j = 226;
do
{
while (--j);
} while (--i);
}
void Delay12us() //@11.0592MHz
{
unsigned char i;
_nop_();
_nop_();
_nop_();
i = 30;
while (--i);
}
void delay_ms(unsigned int ms) //延时
{
unsigned int i;
unsigned char j;
for(i=0;i<ms;i++)
{
for(j=0;j<200;j++);
for(j=0;j<102;j++);
}
}
bit read_busy() //读状态
{
e = 0;
rs = 0;
rw = 1;
e = 1;
state = P2 >> 7 | 0;
delay5ms();
e = 0;
return state;
}
void write_cmd(unsigned char cmd) //写指令
{
while(read_busy()); //等待lcd屏不忙
e = 0;
rs = 0;
rw = 0;
P2 = cmd;
e = 1;
delay5ms();
e = 0;
}
void write_data(unsigned char date)
{
while(read_busy()); //等待lcd屏不忙
e = 0;
rs = 1;
rw = 0;
P2 = date;
e = 1;
delay5ms();
e = 0;
}
void init_dht11()
{
//启动dht11采集数据《-》初始化dht11
P2_0 = 1;
P2_0 = 0;
delay_ms(20);
P2_0 = 1;
delay_ms(0.04);
}
unsigned char read_io()
{
unsigned char i;
unsigned char date = 0;
for(i = 0; i < 8; i++)
{
while(P2_0 == 0); //过掉50us的时间间隙
nug = 0;
delay_ms(0.03);
if(P2_0 == 1)
{
nug = 1;
}
date = date << 1;
date = date | nug;
while(P2_0 == 1); //过掉收到的数据位为1的那段时间
}
return date;
}
void init_serial() //********************************************烟雾浓度模块
{
//1.配置串口通信方式1 接收使能
//SCON
SM0 = 0;
SM1 = 1; //配置串口通信的方式1
REN = 1; //接收使能
//2.配置波特率为9600
TMOD = 0x20; //配置定时器1的工作方式2 8位自动重装
TH1 = 0xFD; //配置定时器计数寄存器高8位的重装值
TL1 = 0xFD; //配置定时器计数寄存器低8位的起始计数值
TR1 = 1; //开启定时器1
EA = 1; //开启总中断
ES = 0; //关闭串口中断
}
void uart(void) interrupt 4
{
if(RI == 1)
{
buf[nub] = SBUF;//接收数据
RI = 0; //清除接收标志位
nub++;
}
if(nub == 9)
{
ES = 0; //关闭串口中断
if(buf[0] == 0xFF && buf[1] == 0x86)
{
value = buf[2] << 8 | buf[3]; //烟雾浓度值
}
nub = 0;
flag = 1;
}
}
void Timerinit() //初始化定时器 **********************************超声波测距模块
{
TMOD=0x01;
TH0=0;
TL0=0;
}
unsigned int distance() //算距离的函数
{
u16 y,z;
echo=0;
trig=1;
Delay12us();
trig=0;
while(echo == 0);
TR0 = 1;
while(echo == 1);
TR0 = 0;
y=TH0*256+TL0; //计算高电平的时间
z=(y*1.7)/100;
TH0 = 0x00;
TL0 = 0x00;
return z;
}
void init_lcd() //初始化lcd屏幕
{
//1.延迟15ms
delay15ms();
//2.写指令38H
write_cmd(0x38);
//3.延迟5ms
delay5ms();
//4.写指令38H
write_cmd(0x38);
//5.延迟5ms
delay5ms();
//6.写指令38H
write_cmd(0x38);
//7.以后每次写指令、读/写数据之前均需检测忙信号
//8.写指令38H：显示设置模式
//while(read_busy());
write_cmd(0x38);
//9.写指令08H：显示关闭
//while(read_busy());
write_cmd(0x08);
//10.写指令01H：显示清屏
//while(read_busy());
write_cmd(0x01);
//11.写指令06H：显示光标移动设置
//while(read_busy());
write_cmd(0x06);
//12.写指令0CH：显示开及光标设置
//while(read_busy());
write_cmd(0x0C);
}
void xianshi( )
{
u8 i;
init_serial();
Timerinit(); //初始化定时器
while(1)
{
dis = distance(); //****************************************距离
for(i=4;i>0;i--)
{
num[i]=ASCII[dis%10];
dis/=10;
}
write_cmd(0x80); //设置数据指针的位置
write_data('J');
for(i=0;i<5;i++) //写数据
{
write_data(num[i]);
}
if(flag == 1) //*************************************烟雾浓度
{
//调用数码管显示函数display(value);
write_cmd(0x80+0x08); //设置数据指针的位置
write_data('Y');
ES = 1; //关闭串口中断
for(w = 0; w < 9; w++)
{
SBUF = cmd[w];
while(TI == 0); //等待数据发送完成
TI = 0; //软件清零清除发送完成中断标志位
}
write_data(SBUF/1000);
write_data(SBUF%1000/100);
write_data(SBUF%1000%100/10);
write_data(SBUF%1000);
flag = 0;
ES = 0; //开启串口中断
}
//启动dht11采集数据《-》初始化dht11 ******************************************温湿度
init_dht11();
if(P2_0 == 0) //dht11响应了
{
while(P2_0 == 0); //过掉dht11的响应信号
while(P2_0 == 1); //过掉dht11把总线拉高的80us
shidu_int = read_io();
shidu_point = read_io();
tem_int = read_io();
tem_point = read_io();
check = read_io();
self_check = shidu_int + shidu_point + tem_int + tem_point;
if(check == self_check)
{
write_cmd(0x80+0x40); //设置数据指针
write_data('S'); //显示湿度
//调用lcd显示函数write_date()
write_data(shidu_int/10);
write_data(shidu_int%10);
write_data(shidu_point/10);
write_data(shidu_point%10);
write_cmd(0x80+0x48); //设置数据指针
write_data('W'); //显示温度
write_data(tem_int/10);
write_data(tem_int%10);
write_data(tem_point%10);
}
}
}
}
void main()
{
init_lcd(); //初始化显示屏
xianshi( ); //显示程序
}

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