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

[PragmaLab]

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