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README: Add development instructions

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Saleem Rashid 2017-12-18 18:38:42 +00:00 committed by Pavol Rusnak
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@ -36,3 +36,22 @@ Step 3 should produce the same sha256 fingerprint like your local build (for the
1. Install python-trezor: `pip install trezor` ([more info](https://github.com/trezor/python-trezor))
2. `trezorctl firmware_update -f build/trezor-TAG.bin`
## Building for development
If you want to build device firmware, make sure you have the
[GNU ARM Embedded toolchain](https://developer.arm.com/open-source/gnu-toolchain/gnu-rm/downloads) installed.
* If you want to build the emulator instead of the firmware, run `export EMULATOR=1 TREZOR_TRANSPORT_V1=1`
* If you want to build with the debug link, run `export DEBUG_LINK=1`. Use this if you want to run the device tests.
* When you change these variables, use `script/setup` to clean the repository
1. To initialize the repository, run `script/setup`
2. To build the firmware or emulator, run `script/cibuild`
If you are building device firmware, the firmware will be in `firmware/trezor.bin`.
You can launch the emulator using `firmware/trezor.elf`. To use `trezorctl` with the emulator, use
`trezorctl -t udp` (for example, `trezorctl -t udp get_features`).
If `trezorctl -t udp` appears to hang, make sure you have run `export TREZOR_TRANSPORT_V1=1`.