[En-Nut-Discussion] how to upload .hex file to ethernutboardinWindows

[Michael Gong]

Hi,  Rob,

Thanks for the information. Actually, I don't have to stick with 
avrdude. As long as I can upload .hex file through my usb-serial 
converted to the board, tool doesn't matter.

Since you pointed out some issues about the usb-serial adapter, I am 
wondering whether you guys have a workaround for that problem ?

Thanks a lot.

Mike


----- Original Message ----- 
From: "PragmaLab" <info at pragmalab.nl>
To: <en-nut-discussion at egnite.de>
Sent: Tuesday, March 06, 2007 3:52 AM
Subject: Re: [En-Nut-Discussion] how to upload .hex file to 
ethernutboardinWindows


> Hello Mike,
>
>> Since my laptop doesn't have a serial port, I bought a usb-serial
>> converter to add a serial port. Will it cause the avrdude not
>> working ?
>>
>> When I connect the board with my "fake" serial port, I can use
>> HyperTerminal (via COM4) to see the output from the board, so
>> I assume
>> the added serial port works.
>
> Although I've never worked with the avrdude, I know that usb-serial 
> adapters
> introduce time-delays when transferring single bytes (like an 'ACK'). 
> We saw
> this problem when using Megaload. The blocks of 256/512 bytes that 
> were send
> from PC to target were no problem, but the single character that was 
> sent by
> the target to indicate that it was ready for the next block was 
> delayed for
> more then 100 msecs. The driver will start sending if either 1)enough
> databytes are available to send, or 2)after a timeout. Might be that 
> this
> delay causes the timeout when using the avrdude?
>
>
> Best regards,
>
> Rob van Lieshout
>
>
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