error in c code when trying to interface 8051 with eeprom

[freemanantony]

hello
i trying to interface eeprom with 8051 with i2c. i am getting syntax error near sda= and scl=.can anyone help me


#include<reg51.h>
#include<stdlib.h>

#define SDA P3^5
#define SCL P3^4

unsigned char tempdata;
void delay()
{
unsigned char i;
for(i=0x00;i<0xFF;i++);
}

void longdelay(void)
{
int h,s;
for(s=0;s<0x50;s++)
for(h=0;h<0xff;h++);

}


void scl_high()
{
hg:
SCL=1;
if(SCL!=1)
goto hg;
}

void start()
{
SDA=1;
scl_high();
SDA=0;
delay();
SCL=0;
}

void stop()
{
SDA=0;
scl_high();
SDA=1;
}

void write (unsigned char data1)
{
unsigned char i;
for(i=0;i<8;i++)
{
SCL=0;
if (data1 & 0x80)
{
SDA = 1;
}
else
{
SDA = 0;
}
SCL = 1;
data1 = data1 << 1;
delay();
SCL = 0;
}


do {
SDA = 1;
} while(SDA==1);

}

void read()
{
unsigned char j;
unsigned char tp;
unsigned char dat;
SDA = 1;
for(j=0;j<8;j++)
{
scl_high();
tp = SDA;
if (tp==1)
dat = (tempdata | 0x01);
else
dat = (tempdata & 0xFE);
tempdata = dat<<1;
SCL = 0;
delay();
delay();
delay();
}
SDA = 1;
scl_high();
SCL = 0;
}

void eeprom_write(unsigned char address, unsigned char dat)
{
start();
write(0x00);
write(address);
write(dat);
stop();
}


void eeprom_read(unsigned char address)
{
start();
write(0x00);
write(address);
stop();
start();
write(0x01);
read();
stop();
}

void sent (unsigned char dat)
{

while(TI==0);
SBUF = dat;
}

void send_data()
{
unsigned char R;
unsigned char J;


R = tempdata & 0xF0;
R = R >> 4;
R = R + 0x30;
sent (R);
J = tempdata & 0x0F;
J = J + 0X30;
sent (J);
}

void main()
{
unsigned char address = 0x00;
unsigned char dat = 0x3E;
EA=0;
longdelay();
longdelay();
longdelay();
longdelay();
TMOD = 0X20;
SCON = 0X50;
TH1 = 0XFD;
eeprom_write(address, dat);
eeprom_read(address);
while(1)
send_data();
}

 

[andre_luis]

Show what error is presented.
Also, you did´nt say the compiler you are using.

+++

 

[microlab]

hi

just change the #define with sbit like follows
sbit SDA = P3^5;
sbit SCL = P3^4;

i think this will solve your problem

regards

ml

 

[freemanantony]

thank you andre for your time.itz showing syntax error near '='.i am using keil uvision2 compiler

 

[microlab]

hi

please try the solution i mentioned, it will be solved

ml

 

[freemanantony]

thank you micro lab for the reply but when i am using sbit it is showing fatal error l211:i/o error on output file:
exception 0029h: access to file denied

 

[microlab]

hi

that could be of some thing else
because in keil this is how we address the individual port pins
what you can do is just remove all other parts and try to compile, you will get the solution
like
#include<reg51.h>

sbit SDA = P3^5;
sbit SCL = P3^4;

void main(void){
SCL = 1;
SDA = 1;
while(1);
}

just check whether it's compiling or not


ml

 

[freemanantony]

thank you microlab, my problem is solved