MIBAM & USART - PIC resets

[Darrel Taylor]

You've set the RCIE bit, which enables interrupts for the USART receive path.
But there is no interrupt handler for that interrupt source.

After it receives any data, it will jump to the ISR, which does not handle the interrupt, and does not clear the flag.
So as soon as it exits the ISR, it generates another interrupt because the RCIF flag is still set.

This continues for about 2 seconds until the Watch Dog Timer resets the PIC.

When you are handling the USART receive in the Main loop ... don't set the RCIE bit.

[vaporized]

OMG, I'm such an idiot! And what is the best, at first I haven't touched the RCIE bit at all, I thought checking the RCIF would be enough. But as I wasn't able to capture any data (god knows what I've messed up then) I've "brilliantly" concluded that the program is not registering data arrival because the RCIF is not being set due to RCIE off. So I switched it on and fell into something which, until your explanation, I didn't understand enough to even try to mess with... Bah, I must be carrying a vapour instead of a brain in my head to poke with things for which I have no adequate apprehension.

Thank you very much, I really appreciate you took the time to help me with this.