File: i2c.py

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import pyb
from pyb import I2C

# test we can correctly create by id
for bus in (-1, 0, 1):
    try:
        I2C(bus)
        print("I2C", bus)
    except ValueError:
        print("ValueError", bus)

i2c = I2C(1)

i2c.init(I2C.MASTER, baudrate=400000)
print(i2c.scan())
i2c.deinit()