Error during sketch upload to ATMEGA 1284 with FTDI-Chip

Using Arduino Interfacing w/ Software on the Computer
1

Hi,

i am using an ATMEGA 1284 with the mighty-Boatloader (GitHub - maniacbug/mighty-1284p: Mighty 1284P Platform for Arduino) and the standard ftdi-chip (ft232). It is not possible for me to upload a sketch via the ftdi-chip, I always get the "not-in-sync" error. I use a 0.1uF Capacitor between DTR and Reset and a 10k Pullup on the ATMEGA reset pin.
When i change the processor to an ATMEGA 328p everthing works great. Also uploading sketches to the 1284 with an isp is no problem.

Any ideas ?

Thank you
Chris

2

You loaded the bootloader via the IDE so the fuses are set correctly?
You have 16 MHz crystal, 22 pF caps, 0.1uF caps on VCC, AVCC?

3

Yes, everything is there.

Today i worked on this error and I reduced it to the following strange behaviour:

When I upload the Bootloader via my AVR MK2 and directly after that upload a sketch via the FTDI, it works! But when i upload any sketch via the AVR MK2 (Upload using Programmer) , there is no chance to upload a sketch after that with the FTDI. The only think you can do, to get the FTDI-Upload working ist to reflash the bootloader.

Any idea for solving this strange behaviour?

4

When you select Upload Using Programmer (MKii) the bootloader is overwritten with the sketch, so FTDI uploads will not work as there is no longer a bootloader.