Using your method with the 1284

[arifainchtein]

Hello,
I am trying to use your code but it just hangs. I made a small pcb that connects the tx, rx , gnd and power and GPIO2 of the raspberry pi (the one below the 3.3v which is pin1) GPIO pins to the chip sitting on a breadboard. I set that pin in autoreset.
.
Also as a test, uploaded a bootloader and a simple program to the chip using an ftdi programmer and the arduino ide on a debian machine.

i then connected the chip to a breadboard using a minimum arduino configuration and connected it to the raspberry pi, I have verified that the raspberry pi can talk to the chip via the GPIO serial por by sending serial commands and getting the expected result. at this point, all i am missing is to be able to upload a firmware from the raspberry pi.
This is the command i use to upload when trying to upload firmware to the chip:

/usr/bin/avrdude -q -V -p atmega1284p -C /home/pi/Teleonome/tmp/MightyCore/avr/avrdude.conf -D -c arduino -b 115200 -P /dev/ttyS0 \ -U flash:w:build-1284p-16MHz_external/Arduino.hex:i

The code just hangs and nothing happens. However, if i open anothe terminal window and run top. it seems like autoreset is called many times. Here is a screen dump.

Any help would be very appreciated

thanks