This tool is for probing, writing and reading the I2C bus of Jolla phone.
For more detailed help, see i2ctool-ug.pdf
Other half bus is /dev/i2c-1/ which is selected by default.
On front page, you can
- change the bus (just keep the default here)
- enable or disable the Vdd supply pin of OH (3.3V)
- start probing of selected bus
- start writing, reading mode
- read, set and write EEPROM configuration
In writing and reading mode you give i2c device address (propably something that probe did found) e.g. 3c
Then select mode, "write", "read", or "write then read"
For write mode, you just enter bytes to be written separated with spaces e.g. 00 c0 ff ee 12 34
For read mode, enter number (count) of bytes to read e.g. 5
For write then read mode, usually you enter register pointer where to read from e.g. 07 and then number of bytes to read e.g. 1
Thats it. Hope you like it.