kopia lustrzana https://github.com/micropython/micropython-lib
42 wiersze
1.4 KiB
Python
42 wiersze
1.4 KiB
Python
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# MicroPython USB CDC REPL example
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#
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# Example demonstrating how to use os.dupterm() to provide the
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# MicroPython REPL on a dynamic CDCInterface() serial port.
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#
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# Note that if you run this example on the built-in USB CDC port via 'mpremote
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# run' then you'll have to reconnect after it re-enumerates, and it may be
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# necessary afterward to type Ctrl-B to exit the Raw REPL mode and resume the
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# interactive REPL back.
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#
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# This example uses the usb-device-cdc package for the CDCInterface class.
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# This can be installed with:
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#
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# mpremote mip install usb-device-cdc
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#
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# MIT license; Copyright (c) 2023-2024 Angus Gratton
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import os
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import time
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import usb.device
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from usb.device.cdc import CDCInterface
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cdc = CDCInterface()
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cdc.init(timeout=0) # zero timeout makes this non-blocking, suitable for os.dupterm()
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# pass builtin_driver=True so that we get the built-in USB-CDC alongside,
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# if it's available.
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usb.device.get().init(cdc, builtin_driver=True)
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print("Waiting for USB host to configure the interface...")
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# wait for host enumerate as a CDC device...
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while not cdc.is_open():
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time.sleep_ms(100)
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# Note: This example doesn't wait for the host to access the new CDC port,
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# which could be done by polling cdc.dtr, as this will block the REPL
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# from resuming while this code is still executing.
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print("CDC port enumerated, duplicating REPL...")
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old_term = os.dupterm(cdc)
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