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Jeremiah, thank you very much for your ideas. The ACK in the last byte was causing the problem. Once the ACK has been replaced by a NACK, the SDA line got free and both PICs worked as they were expect ...

I have found something more... When the slave gets blocked, the SDA line remains low for an unknown reason. When I separate the SDA line I can see that the master keeps it up, while the slave keeps it ...

Hi everybody,
I’m trying to communicate two PICs using I2C. One of them is a 16F877A running at 4MHz (Slave). The other one is a 18F4455 running at 16MHz (Master). Both PICs have AN0 declared for a ...

Hey Douglas! Thank you SOOOOOOOOOOOOOOOOO MUCH!! Very Happy

It was the capacitor!! I simply can’t believe I have spent all these days just for a capacitor! Shocked

It has worked perfectly as it was su ...

Hello everyone,

I am trying to leave the old (but lovely) 232 for the new (but ugly) USB. The main reason for this is that it’s almost impossible to see a PC with classical serial ports nowadays. ...