N900 Hardware Bus I2c

m (Bus 2: direct link)
(Bus 3)
Line 21: Line 21:
* 0x1d [[N900 accelerometer|Accelerometer]]
* 0x1d [[N900 accelerometer|Accelerometer]]
* 0x3e [[N900 camera sensor|Front Camera (control)]]
* 0x3e [[N900 camera sensor|Front Camera (control)]]
 +
===Bus ?===
 +
* 0x? [[N900 Hardware GPS|GPS]]
==Software==
==Software==

Revision as of 22:43, 16 June 2010

I2C is a simple serial bus, used in many devices.

Contents

Hardware

Bus 1

Bus 2

Bus 3

Bus ?

Software

The N900 software driving I2C comes in three flavors.

Firstly, there are a large number of kernel drivers.

Then, there are a small number of devices 'bit banged' through I2C ioctls - BME for example does this with the charge meter and battery charger.

Finally, there are probably some I2C components in the Rapuyama and assorted cellphone/GPS hardware. These are not visible to the casual developer. (you have to open the N900 and probe stuff, or hack the phone firmware).