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read i2c addresses
U-Boot > i2c dev < busnumber >
U-Boot > i2c probe
example
U-Boot > i2c dev 0
U-Boot > i2c probe
read eeprom 0x50
i2c md 0x50 0x20.2 MAC Adresse auslesen
i2c md 0x50 0x30.2 Seriennummer
root@MBaXXX:~ i2cdetect <busnumber>
example
root@MBaXXX:~ i2cdetect 1