要求:在1602上显示某一变量的数值,正常范围,并判断当前状态
如:t:50 60
comfort 40
表示当前温度为50,正常温度为40-60,当前温度正常
红绿字为自己添加的代码,代码可通过keil编译,但在单片机上无法正常显示。如果将绿字部分注释掉单片机就可以正常运行实现功能
**********************************************************************************
* 【函数功能】: DA-AD试验
* 【使用说明】: 单片机:STC89C52
串口波特率:9600
串口一共发送4个字节
1 光敏电阻
2 热敏电阻
3 悬空
4 可调0-5V电压(蓝色电位器调节)
**********************************************************************************/
/********************************************************************************************/
#include<reg52.h> //包含单片机寄存器的头文件
#include <I2C.H>
#define uchar unsigned char
#define PCF8591 0x90 //PCF8591 地址
/********IO引脚定义***********************************************************/
sbit LCD_RS=P1^0;//定义引脚
sbit LCD_RW=P1^1;
sbit LCD_E=P1^2;
/********宏定义***********************************************************/
#define LCD_Data P0
#define Busy 0x80 //用于检测LCD状态字中的Busy标识
/********数据定义*************************************************************/
unsigned char code uctech[] = {"Thank"};
unsigned char code net[] = {"you!"};
unsigned char code clear[] = {" "};
unsigned char code net1[] = {"t:"};
unsigned char code net2[] = {"l:"};
unsigned char code net3[] = {"v:"};
unsigned char t;
//温度
uchar code limit[]={"60"};
uchar code limit1[]={"40"};
unsigned char code condition[]={"too hot"};
uchar code condition1[]={"comfort"};
uchar code condition2[]={"too cold"};
//光
uchar code limit2[]={"100"};
uchar code limit3[]={"60"};
unsigned char code condition3[]={"too bright"};
uchar code condition4[]={"comfort"};
uchar code condition5[]={"too dim"};
//电压
uchar code limit4[]={"200"};
uchar code limit5[]={"100"};
unsigned char code condition6[]={"too big"};
uchar code condition7[]={"comfort"};
uchar code condition8[]={"too small"};
// 变量定义
unsigned char AD_CHANNEL;
unsigned long xdata LedOut[8];
unsigned int D[32];
sbit P2_0 = P2^0;
sbit P2_1 = P2^1;
sbit P2_2 = P2^2;
sbit P2_3 = P2^3;
unsigned char data a;
//按钮
sbit K1=P3^7;
sbit K2=P3^6;
sbit K3=P3^5;
sbit K4=P3^4;
//unsigned char date ;
/*uchar code table[]={0xC0,0xF9,0xA4,0xB0,
0x99,0x92,0x82,0xF8,
0x80,0x90,0x88,0x83,
0xC6,0xA1,0x86,0x8E}; */
// 函数申明
//void delay(uchar i);
bit DACconversion(unsigned char sla,unsigned char c, unsigned char Val);
bit ISendByte(unsigned char sla,unsigned char c);
unsigned char IRcvByte(unsigned char sla);
void Initial_com(void);
void WriteDataLCD(unsigned char WDLCD); //写数据
void WriteCommandLCD(unsigned char WCLCD,BuysC); //写命令
unsigned char ReadDataLCD(void); //读数据
unsigned char ReadStatusLCD(void); //读状态
void LCDInit(void); //初始化
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData); //相应坐标显示字节内容
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData); //相应坐标开始显示一串内容
void Delay5Ms(void); //延时
void Delay400Ms(void); //延时
//******************************************************************/
/*void delay_1ms()
{
unsigned char temp=249;
while(--temp);
temp=249;
while(--temp);
} */
main()
{
Initial_com();
Delay400Ms(); //启动等待,等LCD讲入工作状态
LCDInit(); //初始化
Delay5Ms(); //延时片刻(可不要)
DisplayListChar(0, 1, uctech);
ReadDataLCD();
while(1)
{
/********以下AD-DA处理*************/
switch(AD_CHANNEL)
{
case 0: ISendByte(PCF8591,0x41);
D[0]=IRcvByte(PCF8591); //ADC0 模数转换1 电压
break;
case 1: ISendByte(PCF8591,0x42);
D[1]=IRcvByte(PCF8591); //ADC1 模数转换2 光
break;
case 2: ISendByte(PCF8591,0x43);
D[2]=IRcvByte(PCF8591); //ADC2 模数转换3 温度
break;
case 3: ISendByte(PCF8591,0x40);
D[3]=IRcvByte(PCF8591); //ADC3 模数转换4 可调0-5v
break;
case 4: DACconversion(PCF8591,0x40, D[4]); //DAC 数模转换
break;
}
D[4]=D[3]; //把模拟输入采样的信号 通过数模转换输出
if(K1==0)
{
a=1;
DisplayListChar(0, 1, clear);
DisplayListChar(0, 0, clear);
DisplayListChar(14, 0, limit);
DisplayListChar(14, 1, limit1);
}
if(K2==0)
{
a=2; //0
DisplayListChar(0, 1, clear);
DisplayListChar(0, 0, clear);
DisplayListChar(14, 0, limit2);
DisplayListChar(14, 1, limit3);
}
if(K3==0)
{
a=3; //1
DisplayListChar(0, 1, clear);
DisplayListChar(0, 0, clear);
DisplayListChar(14, 0, limit4);
DisplayListChar(14, 1, limit5);;
}
if(K4==0)
{
a=4; //1
DisplayListChar(0, 1, clear);
DisplayListChar(0, 0, clear);
}
if(a==1)
{
DisplayListChar(0, 0, net1);
DisplayOneChar(2, 0,D[2]/100+0x30);
DisplayOneChar(3, 0,D[2]%100/10+0x30);
DisplayOneChar(4, 0,D[2]%10+0x30);
if(D[2]>60)
{
DisplayListChar(0, 1, condition);
}
if(D[2]<40)
{
DisplayListChar(0, 1, condition2);
}
else
{
DisplayListChar(0, 1, condition1);
}
}
if(a==2)
{
DisplayListChar(0, 0, net2);
DisplayOneChar(2, 0,D[1]/100+0x30);
DisplayOneChar(3, 0,D[1]%100/10+0x30);
DisplayOneChar(4, 0,D[1]%10+0x30);
if(D[1]>100)
{
DisplayListChar(0, 1, condition3);
}
if(D[1]<60)
{
DisplayListChar(0, 1, condition5);
}
else
{
DisplayListChar(0, 1, condition4);
}
}
if(a==3)
{
DisplayListChar(0, 0, net3);
DisplayOneChar(2, 0,D[0]/100+0x30);
DisplayOneChar(3, 0,D[0]%100/10+0x30);
DisplayOneChar(4, 0,D[0]%10+0x30);
if(D[0]>200)
{
DisplayListChar(0, 1, condition6);
}
if(D[0]<100)
{
DisplayListChar(0, 1, condition8);
}
else
{
DisplayListChar(0, 1, condition7);
}
}
if(a==4)
{
DisplayListChar(0, 0, net1);
DisplayOneChar(2, 0,D[2]/100+0x30);
DisplayOneChar(3, 0,D[2]%100/10+0x30);
DisplayOneChar(4, 0,D[2]%10+0x30);
DisplayListChar(0, 1, net2);
DisplayOneChar(2, 1,D[1]/100+0x30);
DisplayOneChar(3, 1,D[1]%100/10+0x30);
DisplayOneChar(4, 1,D[1]%10+0x30);
DisplayListChar(6, 0, net3);
DisplayOneChar(8, 0,D[0]/100+0x30);
DisplayOneChar(9, 0,D[0]%100/10+0x30);
DisplayOneChar(10, 0,D[0]%10+0x30);
}
if(++AD_CHANNEL>4) AD_CHANNEL=0;
/********以下将AD的值通过串口发送出去*************/
/* delay(200);
SBUF=D[0];
delay(200);
SBUF=D[1];
delay(200);
SBUF=D[2];
delay(200);
SBUF=D[3];
delay(200);
if(RI)
{
date=SBUF; //单片机接受
SBUF=date; //单片机发送
RI=0;
}*/
}
}
/*void delay(uchar i)
{
uchar j,k;
for(j=i;j>0;j--)
for(k=125;k>0;k--);
}*/
/*******************************************************************
DAC 变换, 转化函数
*******************************************************************/
bit DACconversion(unsigned char sla,unsigned char c, unsigned char Val)
{
Start_I2c(); //启动总线
SendByte(sla); //发送器件地址
if(ack==0)return(0);
SendByte(c); //发送控制字节
if(ack==0)return(0);
SendByte(Val); //发送DAC的数值
if(ack==0)return(0);
Stop_I2c(); //结束总线
return(1);
}
/*******************************************************************
ADC发送字节[命令]数据函数
*******************************************************************/
bit ISendByte(unsigned char sla,unsigned char c)
{
Start_I2c(); //启动总线
SendByte(sla); //发送器件地址
if(ack==0)return(0);
SendByte(c); //发送数据
if(ack==0)return(0);
Stop_I2c(); //结束总线
return(1);
}
/*******************************************************************
ADC读字节数据函数
*******************************************************************/
unsigned char IRcvByte(unsigned char sla)
{ unsigned char c;
Start_I2c(); //启动总线
SendByte(sla+1); //发送器件地址
if(ack==0)return(0);
c=RcvByte(); //读取数据0
Ack_I2c(1); //发送非就答位
Stop_I2c(); //结束总线
return(c);
}
//*****串口初始化函数***********
//******************************
void Initial_com(void)
{
EA=1; //开总中断
ES=1; //允许串口中断
ET1=1; //允许定时器T1的中断
TMOD=0x20; //定时器T1,在方式2中断产生波特率
PCON=0x00; //SMOD=0
SCON=0x50; // 方式1 由定时器控制
TH1=0xfd; //波特率设置为9600
TL1=0xfd;
TR1=1; //开定时器T1运行控制位
}
/***********写数据********************************************************/
void WriteDataLCD(unsigned char WDLCD)
{
ReadStatusLCD(); //检测忙
LCD_Data = WDLCD;
LCD_RS = 1;
LCD_RW = 0;
LCD_E = 0; //若晶振速度太高可以在这后加小的延时
LCD_E = 0; //延时
LCD_E = 1;
}
/***********写指令********************************************************/
void WriteCommandLCD(unsigned char WCLCD,BuysC) //BuysC为0时忽略忙检测
{
if (BuysC) ReadStatusLCD(); //根据需要检测忙
LCD_Data = WCLCD;
LCD_RS = 0;
LCD_RW = 0;
LCD_E = 0;
LCD_E = 0;
LCD_E = 1;
}
/***********读数据********************************************************/
unsigned char ReadDataLCD(void)
{
LCD_RS = 1;
LCD_RW = 1;
LCD_E = 0;
LCD_E = 0;
LCD_E = 1;
return(LCD_Data);
}
/***********读状态*******************************************************/
unsigned char ReadStatusLCD(void)
{
LCD_Data = 0xFF;
LCD_RS = 0;
LCD_RW = 1;
LCD_E = 0;
LCD_E = 0;
LCD_E = 1;
while (LCD_Data & Busy); //检测忙信号
return(LCD_Data);
}
/***********初始化********************************************************/
void LCDInit(void)
{
LCD_Data = 0;
WriteCommandLCD(0x38,0); //三次模式设置,不检测忙信号
Delay5Ms();
WriteCommandLCD(0x38,0);
Delay5Ms();
WriteCommandLCD(0x38,0);
Delay5Ms();
WriteCommandLCD(0x38,1); //显示模式设置,开始要求每次检测忙信号
WriteCommandLCD(0x08,1); //关闭显示
WriteCommandLCD(0x01,1); //显示清屏
WriteCommandLCD(0x06,1); //显示光标移动设置
WriteCommandLCD(0x0C,1); //显示开及光标设置
}
/***********按指定位置显示一个字符*******************************************/
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
{
Y &= 0x1;
X &= 0xF; //限制X不能大于15,Y不能大于1
if (Y) X |= 0x40; //当要显示第二行时地址码+0x40;
X |= 0x80; //算出指令码
WriteCommandLCD(X, 0); //这里不检测忙信号,发送地址码
WriteDataLCD(DData);
}
/***********按指定位置显示一串字符*****************************************/
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
{
unsigned char ListLength;
ListLength = 0;
Y &= 0x1;
X &= 0xF; //限制X不能大于15,Y不能大于1
while (DData[ListLength]>=0x20){ //若到达字串尾则退出
if (X <= 0xF){ //X坐标应小于0xF
DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符
ListLength++;
X++;
}
}
}
/***********短延时********************************************************/
void Delay5Ms(void)
{
unsigned int TempCyc = 5552;
while(TempCyc--);
}
/***********长延时********************************************************/
void Delay400Ms(void)
{
unsigned char TempCycA = 5;
unsigned int TempCycB;
while(TempCycA--){
TempCycB=7269;
while(TempCycB--);
}
}
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