eeprom 24c02 with 89v51rd2

[Amit Raijade]

hello frnds..

 

i am using above mentioned modules

 

i just want to check whether my code is right wrong or will it run…because it is not showing response at the time of viewing response on seven segment display.

 

here is my code.

 

#include<reg51.h>

 

sbit  sda =P3^7;

sbit  scl =P3^6;

 

sbit    dig0            =   P2^1;

sbit    dig1            =   P2^2;

sbit    dig2            =   P2^3;

sbit    dig3            =   P2^4;

sbit    dig4            =   P2^5;

sbit    dig5            =   P2^6;

 

bit flag_wr,flag_rd;

unsigned char RxByte = 0;

 

#define PORT_SEVEN_SEG  P0    //Output Port

#define I2C_SPEED_FACTOR 1

#define Crystal_Value 12

#define HalfBitDelay (500*Crystal_Value)/(12*I2C_SPEED_FACTOR)

 

void start();

void stop();

void init();

void restart();

void ack();

void I2C_Write_Byte(byte);

unsigned char I2C_Read_Byte(void );

void display(unsigned char );

 

void delay(unsigned int d)

{

   unsigned int i, limit;

   limit = d/15;

 

   for(i=0;i<limit;i++);

}

 

void main()

{

 

init();                 // Initialize i2c pins

 

start();                // Send start bit on i2c

I2C_Write_Byte(0x08);

RxByte = I2C_Read_Byte();    // Read value from i2c

 

ack();                  // Send ACK bit on i2c

stop(); // Send stop bit on i2c

//if(flag_rd)

// display(RxByte);

while(1);

}

 

void init(){

        sda = 1;

        scl = 1;

}

 

void start()

{

scl=1;

sda=1;

delay(HalfBitDelay);

sda=0;

scl=0;

}

 

 

void stop(){ 

scl=1;

 sda=0;

delay(HalfBitDelay/2);

sda=1;

}

 

void restart(){

        scl = 0;

     delay(HalfBitDelay/2);

        sda = 1;

     delay(HalfBitDelay/2);

        scl = 1;

     delay(HalfBitDelay/2);

        sda = 0;

     delay(HalfBitDelay/2);

}

 

void ack(){

        sda = 0;

     delay(HalfBitDelay/2);

        scl = 1;

     delay(HalfBitDelay/2);

        scl = 0;

     delay(HalfBitDelay/2);

        sda = 1;

     delay(HalfBitDelay/2);

}

 

void I2C_Write_Byte(unsigned char Byte)

{

unsigned char i;

 

for(i=0;i<8;i++)

{

scl=0;

    delay(HalfBitDelay/2);

if((Byte<<i)&0x80)  

sda=1;

else

sda=0;

    delay(HalfBitDelay/2);

  scl=1;

    delay(HalfBitDelay/2);

    }

flag_wr = 1;

}

 

unsigned char I2C_Read_Byte(void)

{

unsigned char i, d, RxData = 0;

 

for(i=0;i<8;i++)

{

scl=0; // Make SCK pin low

sda=1; // Don’t drive SDA 

delay(HalfBitDelay); // Half bit delay

scl=1; // Make SCK pin high

delay(HalfBitDelay/2); // 1/4 bit delay

d = sda;    // Capture Received Bit

RxData = RxData|(d<<(7-i));   // Copy it in RxData

delay(HalfBitDelay/2); // 1/4 bit delay

 

}

    

    return RxData; // Return received byte

 flag_rd = 1;

}

/*

void display(unsigned char RxByte )

{      

dig0 = 0;

dig1 = 1; 

dig2 = 1;          

dig3 = 1; 

dig4 = 1; 

dig5 = 1; 

     

    PORT_SEVEN_SEG = RxByte; */

 

}    

 

on my card there are 6 displays thats why this dig0 to dig5  

[AJISH ALFRED]

Hi,

The code itself dosen’t mean anything. Please share the details of the hardware including circuit diagram and a brief idea about how you expect it to work.

[Author]

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