[U-Boot-Users] Re: 答复: 答复: [U-Boot-Users] How to program flash of omap5912osk with usb?

[Wolfgang Denk]

In message <436eca11.0ec11203.0cfa.ffffcb34 at mx.gmail.com> you wrote:
>
> After implementing support for USB-based console ("setenv stdout usbtty;
> setenv stdin usbtty") through serial port, I want to download kernel to
> flash through USB port. So I connected USB port and typed the command loadb

"loadb" uses Kermit binary protocol. I am not sure  if  hyperterminal
can send data using this protocol.

> using the terminal named Hyperterminal in Windows. But I found that the
> kernel had been downloaded to flash through serial port rather than USB

No. If you have usbtty working, than your USB link works exactly  like
a serial port as far as U-Boot is concerned.

> port. If I cut down the connection between host serial port and target
> serial port, I can not type any command. How can I deal with this problem.

U-Boot is waiting for a file download using Kermit  Binary  Protocol.
Either  you  send  a  file using this protocol (which requires a tool
that implements this protocol - as mentioned before  I  recomenmd  to
use kermit), or you can terminate the download by pressing ^C.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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