N900 Hardware Bus I2c

m (Bus 2: fix link)
m (Bus 2: direct link)
Line 12: Line 12:
* 0x32 [[N900 Hardware LED]]
* 0x32 [[N900 Hardware LED]]
* 0x60 [[N900 headphone amplifier]]
* 0x60 [[N900 headphone amplifier]]
-
* 0x63 [[N900 Hardware FM Receiver|FM receiver]]
+
* 0x63 [[N900 FM radio receiver|FM radio receiver]]
* 0x55 [[N900 Hardware Charge Meter]]
* 0x55 [[N900 Hardware Charge Meter]]
* 0x6B [[N900 Hardware Battery Charger]]
* 0x6B [[N900 Hardware Battery Charger]]

Revision as of 14:43, 16 June 2010

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

Contents

Hardware

Bus 1

Bus 2

Bus 3

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).