Problem with connection I2C Master - Slave dsPIC30F3010

[rodrigo mendez]

Dear Gentlemen:

I need your support with library I2C, I need make protocol with interface I2C Mater-Slave between 2 dspICs.

I studied the information about the datasheet of this IC and the information about the library.

I understood and i followed the information that show in the example:

"I2c_Test (Demonstration on usage of I2C Library functions)";

But, i want to know how make i one interface to make:

* Master - Slave.
* Slave - Master.

I made the following:

FIRST dsPIC - MASTER, PROGRAM:

unsigned dAddr;
unsigned int datai2c,adcRes,andadc;

void main() {

ADPCFG = 0xFFFF;
PORTB = 0x00FF;
TRISE = 0x0000;

TRISBbits.TRISB3 = 1; // set pin as input - needed for ADC to work


I2C1_Init(10000);
dAddr = 0x00;
andadc = 0x00ff;


while (1) {

adcRes = Adc_Read(3);
adcRes = andadc & adcRes;
datai2c = adcRes;

Delay_100ms();


I2C_Start(); // issue I2C start signal
I2C_Write(0x01); // send byte via I2C according
// TABLE 17-1: 7-BIT I2C
// SLAVE ADDRESS - from datasheet dspic30f3010 )
I2C_Write(dAddr); // send byte (whats is the address location ??)
I2C_Write(datai2c); // send data ADC
// (whats is the data to be written ??)
I2C_Stop();

Delay_100ms();


}
}//~!


SECOND: dsPIC SLAVE - PROGRAM:

int *dAddr;
int take;
int bit7add;

void main() {

ADPCFG = 0xFFFF;
TRISE = 0x0000;

dAddr = 0xF0;


while (1) {


I2C_Init(100000);
I2C_Wait_For_Idle(); // acording the explain this function is to
// Waits for the I²C bus to become free.
// This is a blocking function.
take = I2C_Read(1); // Reads a byte from the I²C bus.


}

}//~!


Please, I need your support and these is my questions.

1. I want know and learn how make this interface correctly. I studied and I made different test & examples but i don´t have results.

2. if is possible One example in Master -Slave and Slave - Master Interface I2C ???

Please, is very important to us to know how use this protocol using I2C.

Thank for Your Attention.

Best Regards,

Rodrigo