circuitpython/tests/pyb/i2c.py

33 lines
657 B
Python

import pyb
from pyb import I2C
# test we can correctly create by id or name
for bus in (-1, 0, 1, 2, 3, "X", "Y", "Z"):
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()
# use accelerometer to test i2c bus
accel_addr = 76
pyb.Accel() # this will init the MMA for us
i2c.init(I2C.MASTER, baudrate=400000)
print(i2c.scan())
print(i2c.is_ready(accel_addr))
print(i2c.mem_read(1, accel_addr, 7, timeout=500))
i2c.mem_write(0, accel_addr, 0, timeout=500)
i2c.send(7, addr=accel_addr)
i2c.recv(1, addr=accel_addr)