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Topic: FTDI gone? How to bypass it? (Read 1 time) previous topic - next topic

Ludo91

Hi,
My arduino mega 1280 works propely, that means, it executes the sketch it currently has in its memory.
Problem is, if i plug it to the computer it says "device not recognized", so I assume the bulit-in ftdi converter is dead. How can i still program the atmega using a "common" ftdi adapter??

retrolefty

#1
Sep 22, 2012, 05:45 pm Last Edit: Sep 22, 2012, 05:49 pm by retrolefty Reason: 1

Hi,
My arduino mega 1280 works propely, that means, it executes the sketch it currently has in its memory.
Problem is, if i plug it to the computer it says "device not recognized", so I assume the bulit-in ftdi converter is dead. How can i still program the atmega using a "common" ftdi adapter??


By wiring the send and receive TTL serial signal lines from the new ftdi to pins 0 and 1 (or is that 1 and 0, I always get in mixed up  ;) ) on the arduino mega shield connector, plus a ground wire from the FTDI adapter to a arduino ground pin, and you should be back in business.

But first you should check to make sure you don't just have a corrupted or missing FTDI USB driver in your PC. Try deleting it and re-installing the FTDI driver and see if that works before going with a new external FTDI serial cable.

Lefty

eried

Also you can buy another ftdi and replace it without too much troubles, just normal soldering iron.
My website: http://ried.cl

Lakes

#3
Sep 22, 2012, 07:27 pm Last Edit: Sep 22, 2012, 07:30 pm by Lakes Reason: 1
With a steady hand and good eyesight... :)

http://fightpc.blogspot.co.uk/2012/04/mending-my-mistakes.html

I would not do it that way (with a hot air gun) myself, if you are really 100% sure the chip is dead, carefully cut the legs from the body and then desolder whats left.

Ludo91

It did worked wiring to the serial 0 tx `n` rx, many thanks to all of you.

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