topic IMX6SLEVK debug uart problems in i.MX Processors

IMX6SLEVK debug uart problems

egorrumjantsev — Sun, 16 Mar 2014 06:25:02 GMT

Hi.

I received IMX6SLEVK and try to bring up u-boot working for it. I compiled U-Boot from Denx site for this board.

I see that U-Boot send debug output to debug UART, via serial console on my Linux PC but i can't sent anything back. TX line doesn't work....even i tri to see with oscilloscope - no data from FT232RQ TX pin.

Maybe the problem in ftdi_sio driver in mt PC? I'm using kernel 2.6.39, so i took driver from 3.4 branch and put it in my current kernel. The reason the same - no TX data.

I checked Android's images from cards that shipped with board, but had same situation.

Why that can happen?

WBR,

Re: IMX6SLEVK debug uart problems

fabio_estevam — Sun, 16 Mar 2014 14:22:30 GMT

Double check your terminal settings, such as no flow control.

Regards,

Fabio Estevam

Re: IMX6SLEVK debug uart problems

egorrumjantsev — Mon, 17 Mar 2014 04:22:19 GMT

Yes, seems the problem was in flow control.

It is very strange....cu doesn't have flow control options and i use it whithout such problems with other devices.

In fact i tried minicom and it worked better.

Thank you!