R2P2 formats part of the flash ROM as a FAT disk during its first startup and generates the directories and files necessary for the system. This process may sometimes fail, so please follow the steps below to verify that initialization has been successful.

  • Start R2P2 and connect to a terminal emulator
  • If initialization is complete, regardless it’s successful or not, the shell should be running
  • Execute the reboot command here
  • The microcontroller will restart, and R2P2’s initialization process should be displayed on the terminal

  • At this time, file integrity checks may fail as shown in the image below

  • If this happens, please reboot again
  • If the same file check fails again, or if another file fails, it is suspicious that the flash ROM state has become corrupted

  • Download flash_nuke.uf2 from the page below and install it on the microcontroller

    https://www.raspberrypi.com/documentation/microcontrollers/pico-series.html#resetting-flash-memory

  • Since the microcontroller’s ROM will be zero-cleared, install R2P2 again and repeat this procedure until all checks pass as shown in the image below

Even in cases other than the above, if you feel that the ROM has become corrupted, use flash_nuke.uf2 to initialize the microcontroller.

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