QRP Labs ProgRock 2

  1. Schematic
  2. Manual
  3. Current Configuration
  4. How to Exit USB Firmware Mode (Mounted USB Filesystem RR2)

Related Pages:
  1. Si5351 IC2 Clock Generator


A programmable crystal replacement. It has three independent outputs with frequency range 3.5kHz to approx 300MHz, and can be optionally GPS disciplined. Configuration is by a micro-USB connector and PC terminal emulator

Source: https://qrp-labs.com/progrock2.html




Active Components



ProgRock2: Triple GPS-disciplined programmable clock Manual Vers: 1.00b


Current Configuration



How to Exit USB Firmware Mode (Mounted USB Filesystem RR2)

Important notes about the ProgRock2 firmware implementation
  1. The only way to enter firmware update mode, is to press ‘f’ on the terminal screen
  2. The only way to get out of firmware update mode, is to update the firmware by copying in a new firmware file. Even power cycling doesn’t get you out of firmware update mode. If you enter firmware update mode by mistake, you can just do a “Copy and paste” of the current firmware in the directory. This will overwrite the firmware with itself, which is pointless except that it does get you out of the firmware update mode. The device instantly unmount and closes. On re-powering the ProgRock2 Ubuntu no longer attemps to mount the USB filesystem and /dev/ttyACM0 reappears and can be accessed with a serial communication application like Putty

  3. When you execute a firmware update, the stored configuration parameters are set back to their defaults; so effectively a firmware update is also a factory reset. Frequency setting are preserved.

    Glenn Lyons VK4PK
    Ver:gnl20240424- pre published v0.9