USART question

teddy

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USART question

· Gepostet: 05.05.2015 - 14:56 Uhr · #1

Hello,
In a project with a ATmega1284, I use 2 UART's.
On one of them, I only need the reception (rxd).
In this case, do you know if it is possible to use the txd port as I/O ?
Thank you for any suggestions!

Lschreyer

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Re: USART question

· Gepostet: 06.05.2015 - 09:27 Uhr · #2

I am sure, if you declare the port as output after initialization of the serport driver, it will work.

Merlin

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Re: USART question

· Gepostet: 06.05.2015 - 11:12 Uhr · #3

You may need to reset the TXEN flag also. Refer to the manual for more details on which register this is in.

teddy

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Re: USART question

· Gepostet: 06.05.2015 - 20:37 Uhr · #4

Good news! Thank you for your answers, I will test it soon.

teddy

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Re: USART question

· Gepostet: 18.05.2015 - 06:33 Uhr · #5

Zitat geschrieben von Merlin

You may need to reset the TXEN flag also. Refer to the manual for more details on which register this is in.

Indeed, I confirm that it is necessary to TXEN false.
This solution satisfies me, because in my application, all the chip pins were used, and I needed an additional digital input.
Thank you for this solution.

USART question

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