Hello guys, I have made Arduino s3v3, a copule of days ago and I have successfully uploaded the bootloader with parallel programmer, then i tried the "blink" test, and it worked. Yesterday I uploaded a program switching leds from pin 2 to pin 13 with a 15ms delay. And today i tried to upload a new program but i get this message.
avrdude: stk500_getsync(): not in sync: resp=0x00 avrdude: stk500_disable(): protocol error, expect=0x14, resp=0x51
At first place I went to troubleshooting but everything seemed ok, then I searched the forum and tried everything I found, diconnecting cables, power, protoshield, using another version of IDE and etc. tried pushing the reset button after "sketch size ***" appears but nothing.
At some point I started thinking I have fried the ATmega, but the old programm is still working after a short delay when I power the board. Now I dont have any idea what to do.
Can somebody give an Idea?