SparkFun Forums

[Solid_Reign]

Hi,

I've been using a code I got for accessing the eeprom on the easyweb board, however it is very inconsistent. I can read fine, however, the writing gives me a lot of trouble, sometimes it will write and sometimes it won't and I have no idea on what it depends on.

I'll have a code like
EE_wr_byte(5, tercer[0]);
EE_wr_byte(6, tercer[0]);
EE_wr_byte(7, tercer[0]);
EE_wr_byte(8, tercer[0]);
EE_wr_byte(9, tercer[0]);
EE_wr_byte(10, tercer[0]);

and it'll write in every space except the "seven", and if I change the value of tercer[0] or even the name, it'll write into that space. I have no idea of what could be the problem, any help would be appreciated.

[Solid_Reign]

I have this code right now, and it is only writing on the even memory spaces,

for ( ffft = 0; ffft<25; ffft++)
{
fffv = ffft+8;
EE_wr_byte(ffft, fffv);
abcd = EE_rd_byte(ffft);
}

The code for writing a byte is this:

void EE_wr_byte(int EE_address, char data)
{

unsigned char transfer;
unsigned int temp;
unsigned char control = 0xA0;
P4OUT |= SDA + SCL; //Stop
P4DIR |= SDA + SCL; //Port as output
P4OUT &= ~SDA; //Start
EE_ser_out(control); //Control-byte
temp = (EE_address >> 8); //High byte to send
transfer = temp;
EE_ser_out(transfer);
transfer = EE_address;
EE_ser_out(transfer);
EE_ser_out(data);

P4OUT |= SCL; //Stop
P4OUT |= SDA;

}

void EE_ser_out(char data)
{
unsigned int a;

P4OUT &= ~SCL; //SCL = 0
for(a=0;a<8;a++)
{
if(data & BIT7)
{
P4OUT |= SDA;
}
else
{
P4OUT &= ~SDA;
}
P4OUT |= SCL;
P4OUT &= ~SCL;
data = data << 1;
}
P4DIR &= ~SDA;
P4OUT |= SCL; //Clock-pulse
P4OUT &= ~SCL;
P4DIR |= SDA;

}

thanks