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https://github.com/trezor/trezor-firmware.git
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ad73e41080
All interfaces are sharing a single 8kB buffer. It is reallocated once per session and is acquired by the first active session. Other concurrent sessions will respond with an "Another session in progress" error. [no changelog]
63 lines
1.7 KiB
Python
63 lines
1.7 KiB
Python
# isort:skip_file
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# fmt: off
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# We are tightly controlling the memory layout. Order of imports is important.
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# Modules imported directly from here also must take care to have as few dependencies
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# as possible.
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# === Import always-active modules
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# trezor imports only C modules
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import trezor
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# trezor.utils import only C modules
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from trezor import utils
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# we need space for 30 items in the trezor module
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utils.presize_module("trezor", 30)
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# storage imports storage.common, storage.cache and storage.device.
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# These import trezor, trezor.config (which is a C module), trezor.utils, and each other.
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import storage
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# we will need space for 12 items in the storage module
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utils.presize_module("storage", 12)
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if not utils.BITCOIN_ONLY:
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# storage.fido2 only imports C modules
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import storage.fido2 # noqa: F401
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if __debug__:
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# storage.debug only imports C modules
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import storage.debug
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# trezor.pin imports trezor.utils
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# We need it as an always-active module because trezor.pin.show_pin_timeout is used
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# as a UI callback for storage, which can be invoked at any time
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import trezor.pin # noqa: F401
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# === Prepare the USB interfaces first. Do not connect to the host yet.
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# usb imports trezor.utils and trezor.io which is a C module
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import usb
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# create an unimport manager that will be reused in the main loop
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unimport_manager = utils.unimport()
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# unlock the device, unload the boot module afterwards
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with unimport_manager:
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import boot
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del boot
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# start the USB
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import storage.device
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usb.bus.open(storage.device.get_device_id())
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if utils.USE_BLE:
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from trezorio import ble
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ble.start_comm()
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# run the endless loop
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while True:
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with unimport_manager:
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import session # noqa: F401
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del session
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