N900 Hardware Bus I2c

(Undo revision 54266 by joerg_rw (Talk))
(Bus 3: Front->Main)
Line 21: Line 21:
* 0x1d [[N900 accelerometer|Accelerometer]]
* 0x1d [[N900 accelerometer|Accelerometer]]
* 0x22 [[N900 FM radio receiver|FM Receiver]]
* 0x22 [[N900 FM radio receiver|FM Receiver]]
* 0x3e [[N900 camera sensor|Front Camera (control)]]
* 0x3e [[N900 camera sensor|Main Camera (control)]]
===Bus ?===
===Bus ?===

Revision as of 12:41, 5 July 2016

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



Bus 1

Bus 2

Bus 3

Bus ?

edit: GPS is connected to RAPUYAMA and available to application processor only via libisi / cellmo-proxy


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).