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  甜蜜Love戀 2016-10-23 00:00:00

  你仿照这个程序改改你的显示 #include<reg52.h> #include <intrins.h> #include <math.h> #include <stdio.h> #define uchar unsigned char #define uint unsigned int #define LCD_DATA P0 sbit lcd_flag=P0^7; sbit LCD_RS=P3^0; sbit LCD_RW=P3^1; sbit LCD_E=P3^3; sbit p32=P3^2; sbit ST=P2^3; sbit OE=P2^4; sbit EOC=P2^5; static long int counter; static long float f; float Vbuf=0，xy，tmp，flag=0; void lcd_delay(int ms) //延时函数 { uchar i; while(ms--) { for(i=0;i<250;i++) { _nop_();_nop_();_nop_();_nop_(); } } } bit lcd_busy() //判断是否忙碌 RS＝Low，RW＝High，E＝High：读状态 { bit flag; LCD_RS=0; //寄存器为Low LCD_RW=1; //是否读写为High LCD_E=1; //使能端为High if (lcd_flag==1) flag=1; else flag=0; LCD_E=0; return flag; //返回标志，判断是否LCD忙碌 } write_command(uchar command) //写指令时序 { while(lcd_busy()); LCD_RS=0; LCD_RW=0; LCD_E=0; LCD_DATA=command; //delay_1ms(5); LCD_E=1; LCD_E=0; } write_data(uchar da) //写数据时序 { while(lcd_busy()); LCD_RS=1; LCD_RW=0; LCD_E=0; // delay_1ms(5); LCD_DATA=da; LCD_E=1; LCD_E=0; } void LCD_INIT(void) { write_command(0x38); lcd_delay(1); //LCD为2行，5×7字 write_command(0x0c); lcd_delay(1); //打开显示，显示光标，光标不闪 write_command(0x06); lcd_delay(1); //每次右移一字符 } void main() { uchar i，j，n; uchar buff[16]，buf[16]; LCD_INIT(); P2 &=0xf8; while(1) { flag++; if(flag >= 10) { ST = 0; OE = 0; ST = 1; ST = 0; if(EOC == 1) { OE = 1; xy = P1; OE =0; if(xy > tmp) { tmp = xy; Vbuf = xy*1.0/50; } } } if(flag < 10) { TMOD=0X09; TH0=0; TL0=0; while(p32==1); TR0=1; while(p32==0); while(p32==1); TR0=0; } counter=TH0*256+TL0; while(counter<=500) /*判断是否分频及计算分频次数*/ { P2++; i++; counter=counter*10; if(i==2) { P2 &= 0xf8; break; } } f=(1843200.0/(2*counter))*pow(10，i); sprintf(buf，" V=%4.2fv"，Vbuf); //if(f<1500) f = f / 1.3123; if(f<1000) { sprintf(buff，"f=%4.2fHZ"，f); } else if(f<1000000) { f=f/1000; sprintf(buff，"f=%4.2fkHZ"，f); } write_command(0x80); for( j=0;j<16&&buf[j] != '\0';j++) { write_data(buf[j]) ; } write_command(0xc0); for(n=0;n<16&&buff[n]!='\0';n++) { write_data(buff[n]); } } }

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