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Author Topic: ATmega1284P FTDI USB Serial Light Adapter  (Read 522 times)
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Hey!

I've searched and searched trying to find an answer to my problem. I've followed these guides in order to setup and burn the bootloader!
http://arduino.cc/forum/index.php/topic,80483.0.html
http://www.gammon.com.au/forum/?id=11637

I'm using a Atmega1284P with a 16MHz crystal. I succesfully burned the Mighty 1284P Optiboot bootloader to the Atmega1284P using my arduino mega R3 (arduino ISP). When I tried to upload a sketch using my Arduino USB Serial Light adapter, all I get is random errors like:
Code:
avrdude: stk500_paged_write(): (a) protocol error, expect=0x14, resp=0x64
avrdude: stk500_cmd(): programmer is out of sync

I saw a lot of folks here with the same problem but didn't find any solution. I tried a bunch of bootloaders with the same results. The Piccaso Mighty slow Optiboot bootloader https://github.com/piccaso/mighty-1284p/tree/master/bootloaders/optiboot made uploading sketches possible. But the results is still very variable. Sometimes I get the error i mentioned above and sometimes I get a successful upload. I think the problem lies in the baudrate but still I'm not sure.

The Piccaso slow bootloader uses a baudrate of 28800. Is it possible to take the baudrate down to 19200 or maybe even 9600? Which files do I have to change (except for the Boards.txt file)?

And if i'm wrong, then what's the solution to this problem? Going nuts here!!

P.S Am using Arduino 1.0.1 D.S

//Basel
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