单片机+DHT11怎么在数码管上显示温湿度上下限阈值，并通过按键调节？ -

#include <reg51.h>
#include <absacc.h>
#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
#define cmd_8155 XBYTE[0x8000]
#define pb_8155 XBYTE[0x8002]
#define pc_8155 XBYTE[0x8003]
sbit dht=P1^0;
sbit k1=P1^1;
sbit k2=P1^2;
sbit k3=P1^3;
sbit k4=P1^4;
sbit k5=P1^5;
sbit k6=P1^6;
sbit rled=P3^2;
sbit tled=P3^3;
unsigned char s[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//共阴极0~9编码
unsigned char table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x76,0x38};//共阴极0~9+H、L编码
unsigned char DisBuff[5]={0,0,0,0,0};
unsigned char a[5]={0,0,0,0,0};
uchar k;
signed char R;//湿度
signed char T;//温度
unsigned char key_value;//按键值
unsigned char WRH=85,WRL=35,WTH=40,WTL=15;
uint flag=0,c;
void delay_ms(unsigned int cnt) //延时函数ms
{
unsigned int x;
for( ; cnt>0; cnt--)
{
for(x=110; x>0; x--);//软件延时为1MS
}
}
void delay_us(unsigned int cnt) //延时函数us
{
while(cnt--);
}
void DHT11_delay_us(unsigned char n)//DHT延时函数us
{
while(--n);
}
void DHT11_delay_ms(unsigned int z)//DHT延时函数ms
{
unsigned int i,j;
for(i=z;i>0;i--)
for(j=110;j>0;j--);
}
void DHT11_start()//DHT启动函数
{
dht=1;
DHT11_delay_us(2);
dht=0;
DHT11_delay_ms(30); //延时18ms以上
dht=1;
DHT11_delay_us(30);
}
unsigned char DHT11_rec_byte() //接收一个字节
{
unsigned char i,dat=0;
for(i=0;i<8;i++) //从高到低依次接收8位数据
{
while(!dht); ////等待50us低电平过去
DHT11_delay_us(8); //延时60us，如果还为高则数据为1，否则为0
dat<<=1; //移位使正确接收8位数据，数据为0时直接移位
if(dht==1) //数据为1时，使dat加1来接收数据1
dat+=1;
while(dht); //等待数据线拉低
}
return dat;
}
void DHT11_receive() //接收40位的数据
{
unsigned char R_H,R_L,T_H,T_L,RH,RL,TH,TL,revise;
DHT11_start();
if(dht==0)
{
while(dht==0); //等待拉高
DHT11_delay_us(40); //拉高后延时80us
R_H=DHT11_rec_byte(); //接收湿度高八位
R_L=DHT11_rec_byte(); //接收湿度低八位
T_H=DHT11_rec_byte(); //接收温度高八位
T_L=DHT11_rec_byte(); //接收温度低八位
revise=DHT11_rec_byte();//接收校正位
DHT11_delay_us(25); //结束
if((R_H+R_L+T_H+T_L)==revise) //校正
{
RH=R_H;
RL=R_L;
TH=T_H;
TL=T_L;
}
R=RH;
T=TH;
}
}
void key(){
if(k1==0&&flag==0){
flag=1;}
if(k1==1&&flag==1){
c=0;
flag=0;}
if(k2==0&&flag==0){
flag=1;}
if(k2==1&&flag==1){
c=1;
flag=0;}
if(k3==0&&flag==0){
flag=1;}
if(k3==1&&flag==1){
c=2;
flag=0;}}
void disr()//展示湿度上下限
{
unsigned char i,j,rn[6]={11,0,0,10,0,0};
rn[1]=WRH/10;
rn[2]=WRH%10;
rn[4]=WRL/10;
rn[5]=WRL%10;
SP = 0x60;
cmd_8155 = 0x0e;
pc_8155=0;
for(k=0;k<200;k++){
j=32;
for(i=0;i<6;i++)
{ pb_8155 = table[rn[i]];
delay_us(10);
pc_8155 = j;
j = j/2;
}
delay_ms(1);}}
void dist()//展示温度上下限
{
unsigned char i,j,tn[6]={11,0,0,10,0,0};
tn[1]=WTH/10;
tn[2]=WTH%10;
tn[4]=WTL/10;
tn[5]=WTL%10;
SP = 0x60;
cmd_8155 = 0x0e;
pc_8155=0;
for(k=0;k<200;k++){
j=32;
for(i=0;i<6;i++)
{ pb_8155 = table[tn[i]];
delay_us(10);
pc_8155 = j;
j = j/2;
}delay_ms(1);}}
void display() //展示当前温湿度
{
unsigned char i,j,shu[6]={0,0,0,0,0,0};
shu[0]=R/10;
shu[1]=R%10;
shu[4]=T/10;
shu[5]=T%10;
SP = 0x60;
cmd_8155 = 0x0e;
pc_8155=0;
for(k=0;k<200;k++)
{
j = 32;
for(i=0;i<6;i++)
{
pc_8155 = 0x00;
delay_us(10);
pb_8155 = s[shu[i]];
pc_8155 = j;
j = j/2;
delay_us(10);
}}delay_ms(1);}
void initscon(){//初始化串口
SCON=0X40;
TMOD=0X20;
PCON=0X00;
TH1=0xfd;
TL1=0xfd;
ES=0;
ET1=0;
TR1=1;
}
void send(){//向串口发送数据
uchar i;
initscon();
for(i=0;i<4;i++){
SBUF=a[i];
while(TI==0);
TI=0;}}
void main(void)//主函数
{ while(1){
DHT11_receive();//读取温湿度
a[0]=R/10;
a[1]=R%10;
a[2]=T/10;
a[3]=T%10;
send();
key();
switch(c){
case 0:display();break;
case 1:disr();break;
case 2:dist();break;}
if(R>WRH||R<WRL){
rled=0;}else{
rled=1;}
if(T>WTH||T<WTL){
tled=0;}else{
tled=1;}
}}

复制代码