I am try to read data from this mcu ( its i2c slave), but its always answer NACK
Writing data is doing properly
Init i2c:
GP0CON0 = BIT4+BIT12;
GP0KEY1 = 0x07;
GP0CON1 = BIT1;
GP0KEY2 = 0x13;
I2CID0 = 0xA0;
I2CID1 = 0xA0;
I2CID2 = 0xA0;
I2CID3 = 0xA0;
I2CFSTA = BIT8;// Flush Slave Tx FIFO
I2CFSTA &=~BIT8;
I2CSCON = BIT0+BIT4+BIT9+BIT8+BIT10;
I2C IRQ :
if ((IRQSTATUS & BIT16 )==BIT16 ) //i2C interrupt
{
I2CSSTATUS = I2CSSTA;
if ((I2CSSTATUS & BIT3)==BIT3) //I2C slave RX int - FIFO not empty
{
if (storeCount <9)
{
protocol.data[storeCount]=I2CSRX;
storeCount++;
}
else
{
storeCount = 0;
}
}
if ((I2CSSTATUS & BIT2)==BIT2) //I2C Master TX
{
I2CSTX=0x02;
}
if ((I2CSSTATUS & BIT10)==BIT10) //Stop after start
{
storeCount = 0; // Reset counter Array pointer.
I2CFSTA = BIT8; // Flush Slave Tx FIFO
I2CFSTA &= ~BIT8;
}
if ((I2CSSTATUS & BIT13) == BIT13) // If I2C Repeated Start detected
{
storeCount = 0; // Reset counter Array pointer.
I2CFSTA = BIT8; // Flush Slave Tx FIFO
I2CFSTA &= ~BIT8;
}
}
I2C data from sniffer attached
In which direction to watch ?
