Help with Firmware upload (3 replies)

Hi!

I have a problem with my Sanguinololu 1.3a

I recently wanted to upload to it Marlin firmware, because I had to install new ATMEGA1284P-PU microcontroller, but in Arduino 0023 I keep getting "avrdude: stk500_getsync(): not in sync: resp=0x00" error after trying to upload.

I tried ways described in [reprap.org] article:
I tried that 10 seconds reset holding.
I already had those 2-pin connected before.
I can see USB Serial Port (COM3) under Ports (COM and LPT).
I have RTS on close checked.


Anyone have any suggestion on what I am doing wrong?