pt100测温程序.docVIP

下载后可显示仿真图片，网上观看可能不支持图片 #includeat89X52.h sbit LCD_RS =P2^0; sbit LCD_RW =P2^1; sbit LCD_E =P2^2; sbit ADC_CS =P2^3; sbit ADC_WR =P3^6; sbit ADC_RD =P3^7; #define LCD_DATA P0 unsigned char LcdBuf1[10]=; unsigned char code Bmp001[][8]= { {0x06,0x09,0x09,0x06,0x00,0x00,0x00,0x00}, {0x06,0x09,0x10,0x10,0x10,0x09,0x06,0x00} }; void dellay(unsigned int h) { while(h--); //0.01MS } void WriteDataLcd(unsigned char wdata) { LCD_DATA=wdata; LCD_RS=1; LCD_RW=0; LCD_E=0; dellay(1000); LCD_E=1; } void WriteCommandLcd(unsigned char wdata) { LCD_DATA=wdata; LCD_RS=0; LCD_RW=0; LCD_E=0; dellay(1000); LCD_E=1; } void lcd_init(void) { LCD_DATA=0; WriteCommandLcd(0x38); dellay(1000); WriteCommandLcd(0x38); dellay(1000); WriteCommandLcd(0x01); WriteCommandLcd(0x0c); } void display_xy(unsigned char x,unsigned char y) { if(y==1) x+=0x40; x+=0x80; WriteCommandLcd(x); } void display_string(unsigned char x,unsigned char y,unsigned char *s) { display_xy(x,y); while(*s) { WriteDataLcd(*s); s++; } } void Write_CGRAM(unsigned char add,unsigned char *char_num) { unsigned i; add=add3; WriteCommandLcd(0x40|add+8); for(i=0;i8;i++) { WriteDataLcd(*char_num++); } } void delayms() { int i; for(i=110;i0;i--); } void delay1s() { int i,j; for(i=1000;i0;i--); for(j=110;j0;j--); } void convert() { unsigned long value; char i; unsigned long res; int temp,temp2; int w; P1=0xff; ADC_RD=0; for(i=0;i10;i++); value=P1; res=(float)(2550000+110000*value/30)/(2550-11*value/30); temp=(float)(res*10000/3851-545; temp2 = temp; if(temp = 0) { for(i=6;temp0;i--) { LcdBuf1[i]=temp%10+48; temp/=10; } } if(temp 0 ) { w= -temp; for(i=6;w0;i--) { LcdBuf1[i]=w%10+48; w/=10; } } if(i=0temp0) { if(temp -10) { LcdBuf1[i] = 0; i--; } LcdBuf1[i