We are so tired and would like to get help with this. We are trying to bootload using the arduino Uno.
We have an
atmega 328p smd , that we are trying to bootload. We have connected all the right pins, added to the boards.txt the
"Atmega328 on a breadboard(8mhz internal clock)".
Then I have chosen from the "board" menu, this option (internal clock), and uploaded the program. it worked .
Later, I wanted to try and bootload for external clock so I chose from the boards menu the
pro mini with 5v board.(is it wrong?)
Not only that I got an error, now, I can't bootload the internal clock again !!
Why can't we bootload again? Did we damage something? Can it be reset again? How can you bootload for external 16Mhz ??
avrdude: Yikes! Invalid device signature. Double check connections and try again