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BeagleBone Black i2c 读取寄存器

Other Parts Discussed in Thread: DLPDLCR2000EVM

BeagleBone Black 接dlpdlcr2000evm,通过i2c -y 2 0x1b 写参数,用的i2c-2,i2cdump -y 2 0x1b读寄存器数值,发现全为零,这是怎么回事,root后也试过,一样的