You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
52 lines
1.7 KiB
52 lines
1.7 KiB
.TH I2C-STUB-FROM-DUMP 8 "March 2010"
|
|
.SH NAME
|
|
i2c-stub-from-dump \- feed i2c-stub with dump files
|
|
|
|
.SH SYNOPSIS
|
|
.B i2c-stub-from-dump
|
|
.IR address [, address ,...]
|
|
.IR dump-file " [" dump-file " ...]"
|
|
|
|
.SH DESCRIPTION
|
|
i2c-stub-from-dump is a small helper script for the i2c-stub kernel driver.
|
|
It lets you setup one or more fake I2C chips on the i2c-stub bus based on
|
|
dumps of the chips you want to emulate.
|
|
|
|
i2c-stub-from-dump requires i2cdetect and i2cset to be installed and
|
|
reachable through the user's PATH. The former is used to find out the i2c-stub
|
|
bus number, while the latter is used to write to the fake I2C chips.
|
|
|
|
.SH EXAMPLE
|
|
You have an I2C chip on system A. You would like to do some development on its
|
|
driver on system B. Here are the few steps you have to follow.
|
|
|
|
On system A, use i2cdump to capture a dump from the chip. Assuming that the
|
|
chip in question lives at address 0x4c on I2C bus 0, you would run:
|
|
|
|
i2cdump -y 0 0x4c b > chip.dump
|
|
|
|
Adjust the bus number and chip address for your case. i2cdetect can help
|
|
you find out their values. If the device uses word (16-bit) register
|
|
access instead of the traditional byte (8-bit) access, use mode \fBw\fR
|
|
instead of \fBb\fR.
|
|
|
|
Copy the dump file to system B.
|
|
|
|
On system B, run:
|
|
|
|
i2c-stub-from-dump 0x4c chip.dump
|
|
|
|
This will load the required i2c-dev and i2c-stub kernel drivers if needed,
|
|
then write all the register values to the emulated I2C chip at address 0x4c.
|
|
Again, adjust the address as needed.
|
|
|
|
.SH LIMITATIONS
|
|
There are some limitations to the kind of devices that can be handled:
|
|
.IP \(bu
|
|
Device must not have banks (as most Winbond devices do).
|
|
|
|
.SH SEE ALSO
|
|
i2cdump(8), i2cdetect(8), i2cset(8)
|
|
|
|
.SH AUTHOR
|
|
Jean Delvare
|