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

[Ben Warren]

  Hi Grant,

On 8/23/2010 2:10 PM, Grant Edwards wrote:
> 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.
>
I can see how this could be useful.  Please reconsider and we'll try to 
keep the scolding to a minimum :)

regards,
Ben