一下是一个ADC0832模数转换显示，特别是红色不能不明白啥意思，求高手讲解。
#include <reg51.h>
#include <intrins.h>
#define uint unsigned int
#define uchar unsigned char
#define delay4us() {_nop_();_nop_();_nop_();_nop_();}
sbit RS = P2^0;
sbit RW = P2^1;
sbit E = P2^2;
sbit CS = P1^0;
sbit CLK = P1^1;
sbit DIO = P1^2;
uchar Display_Buffer[] = "0.00V";
uchar code Line1[] = "Current Voltage:";
void DelayMS(uint ms)
{
uchar i;
while(ms--)
{
for(i=0;i<120;i++);
}
}
bit LCD_Busy_Check()
{
bit result;
RS = 0;
RW = 1;
E = 1;
delay4us();
result = (bit)(P0&0x80);
E = 0;
return result;
}
void LCD_Write_Command(uchar cmd)
{
while(LCD_Busy_Check());
RS = 0;
RW = 0;
E = 0;
_nop_();
_nop_();
P0 = cmd;
delay4us();
E = 1;
delay4us();
E = 0;
}
void Set_Disp_Pos(uchar pos)
{
LCD_Write_Command(pos | 0x80);
}
void LCD_Write_Data(uchar dat)
{
while(LCD_Busy_Check());
RS = 1;
RW = 0;
E = 0;
P0 = dat;
delay4us();
E = 1;
delay4us();
E = 0;
}
void LCD_Initialise()
{
LCD_Write_Command(0x38); DelayMS(1);
LCD_Write_Command(0x0c); DelayMS(1);
LCD_Write_Command(0x06); DelayMS(1);
LCD_Write_Command(0x01); DelayMS(1);
}
uchar Get_AD_Result()
{
uchar i,dat1=0,dat2=0;
CS = 0;
CLK = 0;
DIO = 1; _nop_(); _nop_();
CLK = 1; _nop_(); _nop_();
CLK = 0;DIO = 1; _nop_(); _nop_();
CLK = 1; _nop_(); _nop_();
CLK = 0;DIO = 1; _nop_(); _nop_();
CLK = 1;DIO = 1; _nop_(); _nop_();
CLK = 0;DIO = 1; _nop_(); _nop_();
for(i=0;i<8;i++)
{
CLK = 1; _nop_(); _nop_();
CLK = 0; _nop_(); _nop_();
dat1 = dat1 << 1 | DIO;
}
for(i=0;i<8;i++)
{
dat2 = dat2 |((uchar)(DIO)<<i);
CLK = 1; _nop_(); _nop_();
CLK = 0; _nop_(); _nop_();
}
CS = 1;
return (dat1 == dat2) ? dat1:0;
}
void main()
{
uchar i;
uint d;
LCD_Initialise();
DelayMS(10);
while(1)
{
d = Get_AD_Result()*500.0/255;
Display_Buffer[0]=d/100+'0';
Display_Buffer[2]=d/10%10+'0';
Display_Buffer[3]=d%10+'0';
Set_Disp_Pos(0x01);
i = 0;
while(Line1!='\0')
{
LCD_Write_Data(Line1[i+1]);
}
Set_Disp_Pos(0x46);
i = 0;
while(Display_Buffer!='\0')
{
LCD_Write_Data(Display_Buffer[i+1]);
}
}
}
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