[U-Boot] [PATCH v2] NS16550: buffer reads

[Graeme Russ]

Hi Wolfgang,

On Monday, October 24, 2011, Wolfgang Denk <wd at denx.de> wrote:
> Dear Graeme Russ,
>
> In message <CALButCK0oVLTbYxbTF=y-vXL+3+=
09VEJpzUnX1+-0SYJQEQJA at mail.gmail.com> you wrote:
>>
>> > > So how does kermit/ymodem send the XON after the user has entered the
>> > > receive command and we have sent the XOFF after the newline?
>> >
>> > Upon the first getc() that follows?
>>
>> And as there will be no corresponding newline, when do we send XOFF?
>
> Never?  Note that kermit / ymodem / S-record download etc. all don't
> have any issues with sendign characters back-to-back at line speed.
>
> Problems happen only with multi-line input, so it is perfectly fine
> to handle just that - at the root cause, i. e. when input turns into
> multi-line input.

Can the U-Boot command line handle multiple commands per line (delimited by
; for example)

If so, could it not be possible that a Kermit/ymodem command followed by a
time consuming command on the same line cause lost input?

Regards,

Graeme