different baud rates on hardware uart

bcs99 · Joined: 22 Nov 2003 Posts: 32

I have a display that transmits at 19200 and has no need to receive and a GPS that receives at 4800 and has no need to transmit. Is it possible to use the hardware usart with Tx at 19200 and the Rx at 4800 at the same time?

Bob

bcs99 · Joined: 22 Nov 2003 Posts: 32

That should be that - I want to transmit at 19200 to the display and receive at 4800 from the GPS.

Bob

Haplo · Joined: 06 Sep 2003 Posts: 659 Location: Sydney, Australia

You can use the function SET_UART_SPEED(baud, [stream]) to change the baud rate on the fly.

Mark · Joined: 07 Sep 2003 Posts: 2838 Location: Atlanta, GA

But you cannot send and receive at the same time with different baud rates.

Haplo · Joined: 06 Sep 2003 Posts: 659 Location: Sydney, Australia

Yes. What you have to do is to set the baud rate and send, then switch the baud rate and receive. Shouldn't be difficult to manage.