使用I2C时报错OSError: [Errno 5] EIO

[amoc]

from pyb import I2C, Pin
i2c = I2C(2, I2C.MASTER)
data = i2c.mem_read(0x5a, 0x07, 2)
print( ustruct.unpack('<H', data)[0])

Traceback (most recent call last):
File "", line 6, in
OSError: [Errno 5] EIO
MicroPython: v1.13-r22 OpenMV: v3.8.0 HAL: v1.9.0 BOARD: OPENMV4P-STM32H743
Type "help()" for more information.

[kidswong999]

你的i2c设备连接好了吗？

[amoc]

连接好了啊

[amoc]

@kidswong999 连接好了，电路图也贴出来了

[kidswong999]

from pyb import I2C

i2c = I2C(2, I2C.MASTER) # The i2c bus must always be 2.
print(i2c.scan())

运行这个代码，看看打印出来的设备的地址。

[amoc]

@kidswong999
MicroPython v1.12-omv OpenMV v3.6.8 2020-09-28; OPENMV4-STM32H743
Type "help()" for more information.
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