Copyright ©
WIN Enterprises, Inc. All Rights Reserved.
Dec., 2014
Chapter 4. U-Boot Reference Manual
32
4.10 I2C commands
Command
Description
i2c bus [muxtype:muxaddr:muxchannel]
show I2C bus info
crc32 chip address[.0, .1, .2] count
compute CRC32 checksum
i2c dev [dev]
show or set current I2C bus
i2c loop chip address[.0, .1, .2] [# of objects]
looping read of device
i2c md chip address[.0, .1, .2] [# of objects]
read from I2C device
i2c mm chip address[.0, .1, .2]
write to I2C device
(auto-incrementing)
i2c mw chip address[.0, .1, .2] value [count]
write to I2C device (fill)
i2c nm chip address[.0, .1, .2]
write to I2C device (constant address)
i2c probe [address]
test for and show device(s) on the I2C
bus
i2c read chip address[.0, .1, .2] length
memaddress
read to memory
i2c write memaddress chip address[.0, .1, .2]
length
write memory to i2c
i2c reset
re-init the I2C Controller
i2c speed [speed]
show or set I2C bus speed
