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i2cdump (8)
  • >> i2cdump (8) ( Linux man: Команды системного администрирования )
  •  

    NAME

    i2cdump - examine I2C registers
    

     

    SYNOPSIS

    i2cdump i2cbus address [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.

     

    CONFORMING TO

    lm_sensors-2.x

     

    SEE ALSO

    i2cset(8), i2cdetect(8), isadump(8)

     

    AUTHOR

    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.


     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    OPTIONS
    WARNING
    CONFORMING TO
    SEE ALSO
    AUTHOR


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