N900 Hardware Bus I2c
(→Bus 2: VGA->Front VGA) |
(→Bus 2: fixed) |
||
| Line 15: | Line 15: | ||
* 0x55 [[N900 Hardware Charge Meter]] | * 0x55 [[N900 Hardware Charge Meter]] | ||
* 0x6B [[N900 Hardware Battery Charger]] | * 0x6B [[N900 Hardware Battery Charger]] | ||
| - | * 0x10 [[N900 Front | + | * 0x10 [[N900 Front camera|Front VGA Camera (control)]] |
===Bus 3=== | ===Bus 3=== | ||
Latest revision as of 12:42, 5 July 2016
I2C is a simple serial bus, used in many devices.
Contents |
[edit] Hardware
[edit] Bus 1
- 0x48 0x49 0x4a 0x4b Gaia/chipset
[edit] Bus 2
- 0x18 0x19 Audio codec
- 0x29 N900 light meter
- 0x30 N900 Hardware Flash Torch
- 0x32 N900 Hardware LED
- 0x60 N900 headphone amplifier
- 0x63 FM radio transmitter
- 0x55 N900 Hardware Charge Meter
- 0x6B N900 Hardware Battery Charger
- 0x10 Front VGA Camera (control)
[edit] Bus 3
- 0x0c Lens focus
- 0x1d Accelerometer
- 0x22 FM Receiver
- 0x3e Main Camera (control)
[edit] Bus ?
- 0x? GPS
edit: GPS is connected to RAPUYAMA and available to application processor only via libisi / cellmo-proxy
[edit] 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).
- This page was last modified on 5 July 2016, at 12:42.
- This page has been accessed 30,020 times.