How do I know which hex file to choose?
I know this is a noob question. But, I am a noob. Anyway, I bought a AVRkey. I know how to flash it but, I have been searching all day and I have downloaded several packs. There are so many hex files. I don't know which one to choose. How do I know?
get the hex file that provides the functionality you need. which most often than not means the latest. go hermes v4. (albeit there is a 4b) as well.
PL3 or Hermesv4b whichever is ported to your board.
It also depends if it fits or not on your Bord!
Do you happen to know how much Mem you have??
You should remember name of your chip (eg.PIC18F2550,AT90USB1287/ the name is on it), name of the board (eg.ATAVRXPLAIN), ewentually it's capacity.
Now, search for an archive named as your board/chip with the right hex file, flash and go!
Ps. If You feel like a noob start in tutorial section! Reading don't hurt too much...