Temperature sensor from Analogue to Digital

thanks! by the way, which port would i acquire the 8bit data because the AT89C52 have 4 port?

Futhermore, i have set aside P0 to LCD display and P1 to keypad.

thanks! by the way, which port would i acquire the 8bit data because the AT89C52 have 4 port?

Futhermore, i have set aside P0 to LCD display and P1 to keypad.

"which port would i acquire the 8bit data because the AT89C52 have 4 port?"

You choose!

Below is the C prog. I notice that the problem is lies with "OPORT = instr;"
because it suppose to move what is in instr into OPORT which is in Xdata at location 0000h but it did not.

#include <reg51.h>

void delay5ms(void);
void delay1ms(void);

void lcdWriteInstrReg(char instr);
void lcdInit(void);
void lcdClrScr(void);

char xdata OPORT _at_ 0x0000;

sbit pinRW = P3^3;
sbit pinRS = P3^4;
sbit pinE = P3^5;

void main(void)
{

lcdInit();
while(1);
}//end main

void lcdWriteInstrReg(char instr)
{

OPORT = instr; //o/p to D0-D7
pinRW = 0; //write
pinRS = 0; //RS=0 for instr Reg
pinE = 0;
pinE = 1;
pinE = 0;
}


void lcdInit(void)
{
delay5ms();
delay5ms();
delay5ms();
delay5ms();
lcdWriteInstrReg(0x38);
delayms();
lcdWriteInstrReg(0x38);
delay1ms();
lcdWriteInstrReg(0x38);
delay1ms();
lcdWriteInstrReg(0x06);
delay1ms();
lcdWriteInstrReg(0x0f);
delay1ms();
lcdClrScr();
}

void lcdClrScr(void)
{
lcdWriteInstrReg(0x01);
delay1ms();
delay1ms();
}

Make OPORT volatile.

Stefan

void main(void)
{
char ebit,ans;

ebit = 0x01;
ans = ebit*(100/256);
}

how can i display the value in ans on LCD
?

void lcdPutStr (char *string)
{
char i;
i=0;
while(string[i])
{
lcdPutCh (string[i++]);
}
}

this is the program segment for putting the characters into LCD.