[U-Boot] FW: which protocol do I use to send S-record files when using the loads command ?

[Grant Edwards]

On 2010-08-23, Detlev Zundel <dzu at denx.de> wrote:

>>>> I didn't say that. I was trying to say that our bareboard system
>>>> doesn't support Ethernet and does not have TCP/IP stack (like Linux).
>>>> If our system was a Linux system, we wouldn't be having this
>>>> conversation.
>>>
>>> We use tftp in U-Boot exactly because we also do not have a TCP/IP
>>> stack :)
>>>
>>> tftp needs only udp is thus "not too complex" to implement on bare
>>> ethernet.
>>
>> Doesn't "our bareboard system doesn't support Ethernet" preclude the
>> use of Ethernet (UDP or otherwise)?
>
> Yes, sorry.  I was mislead by the "and not the more efficient FTP
> used in Linux".  The pure mentioning of FTP which does not make any
> sense without a network port made me read the following statement not
> close enough.

I thought maybe I had lost track of who posted what. :)

>>> Maybe you can implement a server on your hardware?
>>
>> What sort of server?
>
> It would be a tftp server of course but that is out of the question
> without a network hardware.

Now that you mention it, I have implemented a tftp server for U-Boot.

We needed a way to recover "bricked" units in the field, and there's
simply no way we could require out customers to install a tftp server
on their machines.  Making U-Boot the tftp server and our "restore"
program the client solved several problems.  I also find have U-Boot
be the server is a lot more convenient for development use.  [It also
U-Boot commands to be sent via the tftp protocol.]

I thought about submitting patches (it's pretty much a stand-alone
addition except for 3-4 lines in net.[ch]).  But it was made
abundantly clear that tftp server code for U-Boot would never be
considered -- I was scolded for even asking about it.

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