#include<AT89X51.H>
#include<intrins.h>
//引脚定义
sbit RX = P1 ^ 0; //RX=Echo
sbit TX = P1 ^ 1; //TX=trig
sbit CS = P3 ^ 5; //CS=RS
sbit SID = P3 ^ 6; //SID=RW
sbit SCLK = P3 ^ 4; // SCLK=E; PSB接GND
unsigned char code num[]={"0123456789 :.-"};
unsigned char code d1[] ={"水情检测系统"};
unsigned char code d2[]={"水位:"};
unsigned char code d3[]={"PH值:"};
unsigned char code d4[]={"电压值:"};
unsigned char code dw1[] = {"M"};
unsigned char code dw2[] = {"V"};
unsigned int time=0;
long S=0;
bit flag =0;
unsigned char disbuff[4] ={ 0,0,0,0,};
void Delaynms(unsigned int di) //延时
{
unsigned int da,db;
for(da=0;da<di;da++)
for(db=0;db<10;db++);
}
void Send_byte(unsigned char bbyte) //发送一个字节
{
unsigned char i;
for(i=0;i<8;i++)
{
SID=bbyte&0x80; //取出最高位
SCLK=1;
SCLK=0;
bbyte<<=1; //左移
}
}
void Write_char(bit start, unsigned char ddata) //写指令或数据
{
unsigned char start_data,Hdata,Ldata;
if(start==0)
start_data=0xf8; //写指令
else
start_data=0xfa; //写数据
Hdata=ddata&0xf0; //取高四位
Ldata=(ddata<<4)&0xf0; //取低四位
Send_byte(start_data); //发送起始信号
Delaynms(5); //延时是必须的
Send_byte(Hdata); //发送高四位
Delaynms(1); //延时是必须的
Send_byte(Ldata); //发送低四位
Delaynms(1); //延时是必须的
}
void Lcd_init(void) //初始化LCD
{
Delaynms(10); //启动等待，等LCM讲入工作状态
CS=1;
Write_char(0,0x30); //8 位介面，基本指令集
Write_char(0,0x0c); //显示打开，光标关，反白关
Write_char(0,0x01); //清屏，将DDRAM的地址计数器归零
}
void Disp_img(unsigned char *img) //图形方式12864显示字模221 横向取膜
{
unsigned char i,j;
unsigned int k = 0;
Write_char(0,0x36); //图形方式
for(i=0;i<32;i++)
{
Write_char(0,0x80+i);
Write_char(0,0x80);
for(j=0;j<16;j++)
{
Write_char(1,img[k++]);
}
}
for(i=0;i<32;i++)
{
Write_char(0,0x80+i);
Write_char(0,0x88);
for(j=0;j<16;j++)
{
Write_char(1,img[k++]);
}
}
}
void Clr_Scr(void)//清屏函数
{
Write_char(0,0x01);
}
void LCD_set_xy( unsigned char x, unsigned char y )
{ //设置LCD显示的起始位置，X为行，Y为列
unsigned char address;
switch(x)
{
case 0: address = 0x80 + y; break;
case 1: address = 0x90 + y; break;
case 2: address = 0x88 + y; break;
case 3: address = 0x98 + y; break;
default:address = 0x80 + y; break;
}
Write_char(0, address);
}
void LCD_Write_string(unsigned char X,unsigned char Y,unsigned char *s)
{ // 中英文字符串显示函数
LCD_set_xy( X, Y );
while (*s)
{
Write_char( 1, *s );
s ++;
Delaynms(1);
}
}
void LCD_Write_number(unsigned char s)// 数字显示函数
{
Write_char(1,num[ s]);
Delaynms(1);
}
void Lcd_Mark2(void)
{
Clr_Scr();//清屏
LCD_Write_string(0,1,d1);//
LCD_Write_string(1,0,d2);//
LCD_Write_string(2,0,d3);
LCD_Write_string(3,0,d4);
LCD_Write_string(1,7,dw1);//
LCD_Write_string(3,7,dw2);//
}
void Conut(void)
{
time=TH0*256+TL0;
TH0=0;
TL0=0;
S=time*1.87/100; //算出来是M 11。0592M晶振
if(flag==1) //超出测量
{
flag=0;
LCD_set_xy( 1, 3 ); //第二行第三列开始显示
LCD_Write_number(13);
LCD_Write_number(12);
LCD_set_xy( 1, 4 );
LCD_Write_number(13);
LCD_Write_number(13);
}
else
{
disbuff[1]=S%1000/100;
disbuff[2]=S%1000%100/10;
disbuff[3]=S%1000%10 %10;
LCD_set_xy( 1, 3 );
LCD_Write_number(disbuff[1]);
LCD_Write_number(12);
LCD_set_xy( 1, 4 );
LCD_Write_number(disbuff[2]);
LCD_Write_number(disbuff[3]);
}
}
void zd0() interrupt 1 //T0中断用来计数器溢出,超过测距范围
{
flag=1; //中断溢出标志
}
void StartModule() //T1中断用来扫描数码管和计800MS启动模块
{
TX=1; //800MS 启动一次模块
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
_nop_();
TX=0;
}
void main(void)
{
TMOD=0x01; //设T0为方式1，GATE=1
TH0=0;
TL0=0;
TR0=1;
// Lcd_init(); //设置液晶显示器
// Clr_Scr(); //清屏
Lcd_init();
Lcd_Mark2();
while(1)
{
StartModule();
//计算
while(!RX); //当RX为零时等待
TR0=1; //开启计数
while(RX); //当RX为1计数并等待
TR0=0; //关闭计数
Conut();
Delaynms(80); //80MS
}
} |
