ADC0831 analog-to-digital conversion program

/*
Program effect: The digital tube displays one byte of data converted from AD, displayed in decimal
Adjust the corresponding potentiometer to change the displayed data accordingly
Program development: http://www.51hei.com
Principle: 0831 is a serial AD chip. Adjusting the positioner is to adjust the size of the analog voltage input to 0831, and then display it through the digital tube
Operating environment: 51hei single-chip learning board
*/
#include
#include
#define uchar unsigned char
#define uint unsigned int
uchar code table[]={0x3f,0x06,0x5b,//digital tube display value
0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
sbit scl1=P1^3; //chip communication pulse pin
sbit sda1=P1^4; //data transmission pin
sbit px1=P1^5; //Chip select pin, i.e. select ADC0831 and DS1302
sbit cs1=P1^6; //Chip select pin
uchar tmpdata[]={0,0,0};
uchar readad0831();//Define this function to read the data of ADC0831
void display(uchar *lp,uchar lc); //Display sub-function
void delay(); //Delay sub-function
void main() //Main function
{
uchar i=0,tmp;
px1=0; //Select ADC0831 chip
while(1)
{
i++;
if(i==255) //Here is a loop of 255 cycles to read 0831 once,
{ //Because the CPU runs very fast, there is no need to read it every time
tmp=readad0831(); //Read data, so that the CPU resources can be fully utilized
i=0;
tmpdata[0]=tmp/100;//Separate the hundreds digit
tmp=tmp%100;
tmpdata[1]=tmp/10; //separate the tens digit
tmpdata[2]=tmp%10; //separate the ones digit
}
display(tmpdata,3); //output display
}
}
void display(uchar *lp,uchar lc) //display subfunction
{
uchar i; //define local variable
P2=0; //Port P2 is the output port
P1=P1&0xf8; //The first three digits of port P1 are used to control which digital tube is lit.
//If it is changed to P1=0xf8, the digital tube may appear
//non-stop display, making it difficult to distinguish the displayed value
for(i=0;i {
P2=table[lp[i]]; //loop display
delay(); //delay five empty instructions
if(i==7) //check whether all 8 digits have been displayed, and exit directly if completed
//Do not let port P1 add one more, otherwise it will affect port P1^4
break;
P2=0; //clear the port and prepare to display the next digit
P1++; //light up the next digital tube
}
}
void delay() //delay sub-function
{
_nop_();_nop_();_nop_();_nop_();_nop_();
}
uchar readad0831() //This function is written according to the protocol of ADC0831
{
uchar i=0,tmp=0;
sda1=1;
cs1=0; _nop_ (
);
_nop_();
scl1=0; _nop_(); _nop_ (); scl1=1; _nop_ (); _nop_ (); scl1=0; _nop_(); _nop_(); scl1=1; _nop_(); _nop_(); scl1=0; _nop_(); _nop_(); for(i=0;i<8;i++) { tmp<<=1; if(sda1) tmp++; scl1=1;




















_nop_();
_nop_();
scl1=0;
_nop_();
_nop_();
}
cs1=1;
return tmp;
}
If the program does not compile, remove all leading spaces.