Интерактивная система просмотра системных руководств (man-ов)
i2cdump (8)
>> i2cdump (8) ( Linux man: Команды системного администрирования )
NAME
i2cdump - examine I2C registers
SYNOPSIS
i2cdumpi2cbusaddress
[mode]
[bank [bankreg]]
DESCRIPTION
i2cdump is a small helper program to examine registers
visible through the I2C bus.
OPTIONS
At least two options must be provided to i2cdump. i2cbus indicates the
number of the I2C bus to be scanned. This number should correspond to one
of the busses listed by i2cdetect -l. address indicates the
address to be scanned on that bus, and is an integer between 0x00 and 0x7F. The
mode parameter, if specified, is one of the letters b, w,
s, or i, corresponding to a read size of a single byte, a 16-bit
word, an SMBus block, an I2C block, respectively. The c mode is a
little different, it reads all bytes consecutively, and is useful for chips that
have an address auto-increment feature. A p can also be appended to the
mode parameter to enable PEC. If the mode parameter is omitted,
i2cdump defaults to byte access without PEC.
The bank and bankreg parameters are useful on the W83781D and
similar chips (at the time of writing, all Winbond and Asus chips).
bank is an integer between 0 and 7, and bankreg is an integer
between 0x00 and 0xFF (default value: 0x4E). The W83781D data sheet has more
information on bank selection.
WARNING
i2cdump can be dangerous if used improperly. On some chips that do not support
read data commands, i2cdump can actually WRITE to the chip. Do not use i2cdump
on random addresses. Anyway, it is of little use unless you have an idea of
what you are looking for and have some general knowledge about hardware
monitoring chips internals.
This manual page was originally written by David Z Maze <[email protected]> for
the Debian GNU/Linux system. It was then reviewed by the lm_sensors team and
is now part of the lm_sensors source distribution.
