LCD12864(St7920/St7921)+超声波测距模块+STC89C52

/******************************************************************************/
/* ?晶振：11.0592M ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?*/
/* ?接线：模块TRIG接 P1.2 ?ECH0 接P1.1?? ??? ??? ??? ??? ??? ??? ??? ??? ??? ? ?*/
/* ? ? ?RS(CS) ? ?接 ?P3.3;?? ? ?? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ? ? ? ?*/
/* ? ? ?RW(SID) ? 接 ?P3.4;?? ??? ??? ??? ??? ??? ??? ??? ??? ??? ? ? ? ? ? ? ? ?*/
/* ? ? ?E(SCLK) ? 接 ?P3.5;?? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ? ? ? ? ? ?*/
/* ? ? ?PSB ? ? ? 接 ?GND 串行模式?? ??? ??? ??? ??? ??? ??? ??? ??? ??? ? ? ? ?*/
/******************************************************************************/
? ? #include ? <AT89X51.H>
?? ?#include ? <intrins.h>?? ?
//引脚定义
? ? sbit ? ? RX ? ?= ?P1 ^ 1;
? ? sbit ? ? TX ? ?= ?P1 ^ 2;
? ? sbit ? ? CS ? ?= ?P3 ^ 3;?? ?//片选 高电平有效 单片LCD使用时可固定高电平
? ? sbit ? ? SID ? = ?P3 ^ 4;?? ?//数据
? ? sbit ? ? SCLK ?= ?P3 ^ 5;?? ?//时钟

//Function Definition　函数声明?
void Delay(int num);
void Init_DS18B20(void);
unsigned char ReadOneChar(void);
void WriteOneChar(unsigned char dat);
unsigned int ReadTemperature(void);
void clock_out(unsigned char dd);
unsigned char clock_in(void);
unsigned char read_clock(unsigned char ord);
void write_clock(unsigned char ord, unsigned char dd);
void Disp(void);
void id_case1_key(void);
void id_case2_key(void);
void Set_time(unsigned char sel,bit sel_1);
void Timer0_Init(void);
void Init_1302(void);
void Set_Bell(unsigned char sel, bit sel_1);
void Bell(void);
//12864
void Write_char(bit start, unsigned char ddata);
void Send_byte(unsigned char bbyte);
void Delaynms(unsigned int di);
void Lcd_init(void);
void Disp_img(unsigned char *img);
void LCD_Write_string(unsigned char X,unsigned char Y,unsigned char *s);
void LCD_set_xy( unsigned char x, unsigned char y );
unsigned char code num[]={"0123456789 :.-"};
unsigned char code waves[]={"超声波测距系统"};
unsigned char code znwk[] ={"智能微控工作室"};
unsigned char code CM[] = ?{"M"};
unsigned int ?time=0;
? ? ? ? ?long S=0;
? ? ? ? ?bit ?flag =0;
unsigned char disbuff[4]?? ? ? ={ 0,0,0,0,};
unsigned char code logo[]={ ?
/*-- ?调入了一幅图像：logo.bmp ?-- */?
/*-- ?宽度x高度=128x64 欢迎使用本产品LOGO --*/
/*-- ?调入了一幅图像：C:\Documents and Settings\lwd\桌面\新建文件夹\X.bmp ?--*/
/*-- ?宽度x高度=128x64 ?--*/
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};

/******************************************************************************/
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 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 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 Delaynms(unsigned int di) //延时
{
?? ?unsigned int da,db;
??? ?for(da=0;da<di;da++)
? ??? ??? ?for(db=0;db<10;db++);
}

/******************************************************************************/
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 = 0x80 + y; break;?
?? ??? ?case 2: address = 0x90 + y; break;?
? ??? ? ?? ?case 3: address = 0x88 + y; break;
?? ??? ?case 4: 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(1,0,znwk);//
?? ?LCD_Write_string(2,0,waves);//?? ?
?? ?LCD_Write_string(3,7,CM);//?? ?
}

/********************************************************/
? ? void Conut(void)
?? ?{
?? ? ? time=TH0*256+TL0;
?? ? ? TH0=0;
?? ? ? TL0=0;
?? ? ? S=time*1.87/100; ? ? ? //算出来是CM?? ? ?11。0592M晶振
?? ? ? if(flag==1)?? ??? ? ? ? ?//超出测量
?? ? ?{?? ??
?? ? ? flag=0;
?? ? ? LCD_set_xy( 3, 4 );
?? ? ? LCD_Write_number(13);
?? ? ? LCD_Write_number(12);
?? ? ? LCD_set_xy( 3, 5 );
?? ? ? 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( 3, 4 );
?? ? ? LCD_Write_number(disbuff[1]);
?? ? ? LCD_Write_number(12);
?? ? ? LCD_set_xy( 3, 5 );
?? ? ? LCD_Write_number(disbuff[2]);
?? ? ? LCD_Write_number(disbuff[3]);
?? ? ?}
?? ?}
/********************************************************/?
void delayms(unsigned int ms)
{
?? ?unsigned char i=100,j;
?? ?for(;ms;ms--)
?? ?{
?? ??? ?while(--i)
?? ??? ?{
?? ??? ??? ?j=10;
?? ??? ??? ?while(--j);
?? ??? ?}
?? ?}
}
/********************************************************/
? ? ?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?? ?
?? ?Disp_img(logo);?? ? ?//显示欢迎使用本产品LOGO
?? ?Delaynms(1000);
?? ?Lcd_init(); ? ? ? //从图形显示状态下返回
? ? 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();
?? ? delayms(80);?? ??? ?//80MS

?? ?}

} ? ? ? ? ? ? ?