Ok guys, I wanted to make simple electronic device (mostly RGB display) so I bought all the stuff.
I have read like dozens of diffrent tutorials and I managed to connect ATmega328p to breadboard, I burned bootloader to it with my USBasp (internal 8Mhz clock). Everything seemed fine so I upload a Blink sketch from Arduino IDE. It worked great, the LED was powered from Pin13 (same as SCK from USBasp) and it was blinking. So I wanted to try Fading Sketch. But The Led kept blinking.
I was trying to upload ther sketches, empty sketches, burning bootloader, more sketches, more burning, diffrent bootloaders (even external 8Mhz clock), and still... Always the same error (sck period while bootloader and not in sync from avrdude) - even though each time the IDE says all went fine.
I checked connections twice, can you help me out with this? I am desperate at this point. My old (first) program with blinking LED is on ATmega and I cannot upload anything else.
- can someone give me valid boards.txt file to properly configure and burn bootloader?
Thanks in advance!!