SLAVE I2C Not working

[pyroboy123]

Hey all, this is my code for the slave device:

#fuses MCLR,HS,NOWDT,PUT,NOPROTECT,NOBROWNOUT,NOLVP,NOCPD,NOWRT,NODEBUG
#use delay(clock=20000000, RESTART_WDT)


#use i2c(SLAVE, SDA=PIN_B1, SCL=PIN_B4,address=0xB0)

#byte Port_a = 5

#int_ssp
void ssp_interrupt() {
Port_a = 0xFF;
}

void main() {
set_tris_a(0);
enable_interrupts(GLOBAL);
enable_interrupts(INT_SSP);
while (TRUE) {
restart_wdt();
}
}



My master device works because I can get info to and from an eeprom.
I have just added these lines in the masters code :
i2c_start();
i2c_write(0xB0);
i2c_stop();


Could anyone tell me WHY my led on PORT_A on the slave device is not turning on ???

Thx

[agrj]

Hi,

2 things:

1 - CCS said in their manual that you have to use the directive force_hw when using I2C in slave mode

2 - These pins that you are using are the correct SDA and SCL? (what processor are you using?)

I hope it helps

Dinho

[pyroboy123]

nope all you said I have done already.

I'm using a 16F87 and I have tried doing the FORCE_HW and that doesnt change anything either.

Now I'm using the ICD2 to look at my registers ....

I put a breakpoint on one of the first lines.

When I look at SSPCON it is 0

This means that the #use i2c doesnt work ?

[agrj]

what are the value of the others registers:

SSPADD and SSPSTAT?

thanks