IMX6SLEVK debug uart problems

[egorrumjantsev]

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,

[fabio_estevam · Accepted solution]

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

Regards,

Fabio Estevam

[egorrumjantsev]

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!