rx and tx dont tied down

[julian]

Hi,
Im using eusart of a 18f4520, when my process finishes i need to tied down the RX and TX pins, so I use output_low(PIN_C6); and output_low(PIN_C7); but it doesnt work, what can i do?

Thanks

[dyeatman]

I would expect you will first have to disable the EUSART before you "take over" the pins to control them...

setup_uart(false);

This "disconnects" the EUSART so you can control the I/O pins.

Of course you will have to turn it back on when you get ready to use it again.

[SherpaDoug]

Note that low is not the usual idle state for serial pins. If the UART is still active when you pull the serial pin low it will see that as a Start bit and clock in a garbage character. You are doing something unusual, so it may take a bit more typing than the usual.
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[julian]

Thank you dyeatman and SherpaDoug .

Problem solved. I use set_uart(FALSE) like dyeatman say and now my program works well

[julian]

Using setup_uart(FALSE); bring another problem, now my mcu doesnt wake up, this is the code I use at the end of my program