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trezor-firmware/docs/core/misc/disc2.md

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DISC 2

DISC2 is an evaluation board STM32U5G9J used for firmware development of Trezor models with the STM32U5.

The kit has accessible pins, a display, and an embedded ST-Link.

To build and flash firmware to the DISC2 target, follow these instructions:

  1. Compile the firmware for the target with TREZOR_MODEL=DISC2 and BOOTLOADER_DEVEL=1
cd core
TREZOR_MODEL=DISC2 BOOTLOADER_DEVEL=1 make vendor build_boardloader build_bootloader build_firmware

  1. Ensure that TrustZone is enabled on the DISC2 device, as explained here.

  2. Connect the DISC2 ST-Link to the PC using a micro-USB cable (connector CN5).

  3. Erase the DISC2 flash.

TREZOR_MODEL=DISC2 make flash_erase
  1. Flash the freshly compiled firmware from step 1.
TREZOR_MODEL=DISC2 make flash
  1. Reset the device (you may need to do this a couple of times) until it boots up.