I have attached a few sensors and an LCD display, all of them having an I2C interface, to my raspberry pi, and written a software on the pi to read/write them. Right now, I have a network daemon running on the pi to retrieve data to my PC, and control the display from the PC. I would like to, if possible, omit the pi, and control the devices from the PC directly.
The PC has several
/dev/i2c* devices, and I can use
i2cdetect to list them:
root:~# i2cdetect -l i2c-3 smbus SMBus PIIX4 adapter port 4 at 0b00 SMBus adapter i2c-1 smbus SMBus PIIX4 adapter port 2 at 0b00 SMBus adapter i2c-6 i2c NVIDIA i2c adapter 5 at 8:00.0 I2C adapter i2c-4 i2c NVIDIA i2c adapter 1 at 8:00.0 I2C adapter i2c-2 smbus SMBus PIIX4 adapter port 3 at 0b00 SMBus adapter i2c-0 smbus SMBus PIIX4 adapter port 0 at 0b00 SMBus adapter i2c-7 i2c NVIDIA i2c adapter 6 at 8:00.0 I2C adapter i2c-5 i2c NVIDIA i2c adapter 3 at 8:00.0 I2C adapter
So, there are some I2C adapters on the Southbridge, and some more on the video card.
Are any of those likely to be "visible" somewhere I can get to them without having to solder my mainboard? If so, where would I have to look?
i2cdetect -y finds several devices attached to i2c-0, but none to i2c-1, i2c-2 and i2c-3, so I guess using one of the latter should be safe to use as long as I'm not adding any other peripherals which might use them.