Keep failure to flash the optiboot loader to the ATMEGA128P about mightycore

[unebonnevie]

Although I get a verification error when flashing the bootloader (see original post), I am actually able to flash any firmware on my 1284P via the bootloader in using the Arduino IDE's upload menu choice.

Example of flashing the Arduino's Examples->SD->CardInfo SD card example. It flashes and runs fine with the 1284P via Mightycore, except just the failure of verification when flashing the boot loader as pointed out in the original post.

avrdude: AVR device initialized and ready to accept instructions

Reading | ################################################## | 100% 0.00s

avrdude: Device signature = 0x1e9705 (probably m1284p)
avrdude: reading input file "C:\Users\asle\AppData\Local\Temp\arduino_build_733264/listfiles.ino.hex"
avrdude: writing flash (11156 bytes):

Writing | ################################################## | 100% 0.55s

avrdude: 11156 bytes of flash written
avrdude: verifying flash memory against C:\Users\asle\AppData\Local\Temp\arduino_build_733264/listfiles.ino.hex:
avrdude: load data flash data from input file C:\Users\asle\AppData\Local\Temp\arduino_build_733264/listfiles.ino.hex:
avrdude: input file C:\Users\asle\AppData\Local\Temp\arduino_build_733264/listfiles.ino.hex contains 11156 bytes
avrdude: reading on-chip flash data:

Reading | ################################################## | 100% 0.26s

avrdude: verifying ...
avrdude: 11156 bytes of flash verified

avrdude done. Thank you.

[MCUdude]

But you aren't even using MightyCore!
Mighty Mini 1284p @ 16MHz, Optiboot @ 1Mbps is from another Arduino core

[unebonnevie]

Hi,

Also ready installed. I am going to update.

After updating I now have a "MightyCore" menu item in the "Boards" menu.

Now fails to program because fails to find the programmer.

But the programmer is there. "Usbtiny" in the device manager is shown and active.

[MCUdude]

You'll probably have to switch USB drivers. Download Zadig and switch to libusbK I think.