I've been using the incredibly cheap ATTiny13 microcontroller recently and, for one of my projects, I would like to change the clock speed from the default 4.8 MHz it came with. To do this, I believe, one simply burns the desired bootloader to the chip. I should mention that I'm programming the chip using the ArduinoISP sketch with an Arduino Uno and the MicroCore board files. I am able to program the ATTiny13 just fine, all four that I have at the moment, but when I try to burn the bootloader, I get the following error:
avrdude: ser_open(): can't open device "unknown": The system cannot find the file specified.
I don't really know what this means, but it seems to be saying that it can't find the .hex file that should contain the bootloader. I also cannot find any hex files in the MircoCore files. Anyone have any idea what is wrong?