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trezor-firmware/docs/core/misc/disc1.md
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Trezor firmware on STM32F429I-DISC1

The STM32F429I-DISC1 evaluation board has similar MCU to Trezor Model T as well as compatible touchscreen.

On the board, mini-USB is used to flash the firmware using the integrated ST-Link, as well as power the board. The micro-USB connector is used by the firmware to communicate with the trezor client. I.e. normally you need both cables connected.

Make sure JP1, JP2, JP3, and CN4 are fitted with jumpers (board is in this state by default).

Building and flashing

Follow the normal build instructions however pass TREZOR_MODEL=DISC1 to make:

# build firmware images
make build_boardloader build_bootloader build_firmware TREZOR_MODEL=DISC1
# use openocd to flash everything through st-link
make flash

Reset board after command finishes.