topic Re: MCF5213 UART in ColdFire/68K Microcontrollers and Processors

MCF5213 UART

Nouchi — Thu, 05 Oct 2006 21:06:50 GMT

Hi,

Why they don't let me choose TX interrupt source between TXEMPTY flag and TXRDY flag?
You can choose RXRDY or FIFO full interrupt source for the receiver......
I need to disable RS485 driver at the end of frame with a low level, so if I use RTS pin with transmitter, I have to add an inverter gate in my design

Emmanuel

Re: MCF5213 UART

wyliek — Fri, 25 May 2007 18:26:52 GMT

Hi Emmanuel

Did you mamnage to sort out this problem in firmware or did you have to resort to an inverter?

Cheers

Re: MCF5213 UART

Nouchi — Mon, 28 May 2007 13:10:57 GMT

Hi,

No, after all, I managed RTS by hand in the Firmware (RTS as an IO port )

Emmanuel

Re: MCF5213 UART

rsk2 — Thu, 27 Aug 2009 06:44:09 GMT

Hello, I am having the same problem. How did you manage it by hand in firmware without an interrupt? Did you have to poll to see when frame was complete?

Thank you,

Randy Kelso

Re: MCF5213 UART

Nouchi — Fri, 04 Sep 2009 17:16:49 GMT

Hello,

I didn't find any real good solution, if you can't manage RTS by UART functionality, you can start a timer with the amount of time left for the last byte, or poll the TEMP flags. You can also, (if the driver receiver is always enable in RS485 case) waiting for receiving emitted bytes, it's not a nice solution but it should work.

Emmanuel