51单片机实现简易数字电压表(液晶显示)仿真图+程序.docx

液晶显示，89C51实现简易电压表用keil C51软件编译，主函数中包含了两个c文件，即lcd.c 、 ADC0809.c0809的仿真芯片用的是ADC0808进行代替。注意高低位的接法程序如下：/*主函数*/#include #include #include #define uchar unsigned char #define uint unsigned int void main()uchar i;ADC_init();LCD_init();while(1)i=ADC_change();sepr(i);disp();void clock(void) interrupt 1 CLK=CLK; /*0809模数转换（ADC0809.c）*/#include #define uchar unsigned char #define uint unsigned int #define ADC_DB P1sbit ST= P02;sbit EOC= P03;sbit OE= P04;sbit CLK= P01;uchar c6;void sepr(uchar i);void disp();void ADC_init();uchar ADC_change();uchar ADC_change()ST=0; ST=1;ST=0; while(EOC=0);ADC_DB=0xff;OE=1; return(ADC_DB);void disp()gotoxy(1,1);LCD_display(The Output is:);gotoxy(2,5);LCD_display(c);void sepr(uchar i)uint ch;ch=i;c0=0+ch/51;c1=.;c2=0+(ch%51)*10/51;c3=0+(ch%51)*10%51)*10/51;c4=V;c5=0;void ADC_init() TMOD=0x02; TH0=10; TL0=10; EA=1; ET0=1; TR0=1; /*液晶（lcd.c）*/#include #include /库函数头文件，代码中引用了_nop_()函数#define uchar unsigned char#define uint unsigned int#define LCD_DB P2/定义LCD的数据端口 sbit LCD_RS=P05; sbit LCD_RW=P06; sbit LCD_E =P07;/=延时子函数=void delay(uint x)uint i,j;for(i=x;i0;i-) for(j=0;j2;j+);/*侧忙函数*/unsigned lcd_bz() unsigned result;LCD_RS = 0;LCD_RW = 1;LCD_E = 1;_nop_();_nop_();_nop_();_nop_();result = (unsigned)(LCD_DB & 0x80); /检测P2最高位是否为1LCD_E = 0;return result;/返回侧忙结果/=写指令函数=void LCD_w_com(uchar com)while(lcd_bz();LCD_DB=com;LCD_RS=0;/指令LCD_RW=0;/写入LCD_E=1;LCD_E=0;delay(1);/等待执行完毕 。/=写数据函数=void LCD_w_data(uchar dat)LCD_DB=dat;LCD_RS=1;/数据寄存器LCD_RW=0;/写入数据LCD_E=1;LCD_E=0;delay(1);/等待程序执行完毕 。/=初始化函数=void LCD_init(void)LCD_w_com(0x38);/设置8位格式，2行，5*7LCD_w_com(0x0c);/整体显示，关光标，不闪烁LCD_w_com(0x06);/设定输入方式，增量不移位LCD_w_com(0x01);/清屏显示delay(200);/=光标定位=void gotoxy(uchar x,uchar y) / x表示行，y表示列uchar address; if(x=1) address=0x80+y; else address=0xc0+y; LCD