N900 Hardware Bus I2c
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(→Bus 2) |
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==Bus 2== | ==Bus 2== | ||
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| - | |||
| - | |||
* 0x18 0x19 [[N900 Hardware Audio Codec|Audio codec]] | * 0x18 0x19 [[N900 Hardware Audio Codec|Audio codec]] | ||
| + | * 0x29 [[N900 Hardware Light Meter]] | ||
* 0x30 [[N900 Hardware Flash Torch]] | * 0x30 [[N900 Hardware Flash Torch]] | ||
| - | |||
| - | |||
* 0x32 [[N900 Hardware LED]] | * 0x32 [[N900 Hardware LED]] | ||
| - | * | + | * 0x60 [[N900 Headphone Amplifier]] |
| + | * 0x63 [[N900 Hardware FM Receiver|FM receiver]] | ||
* 0x55 [[N900 Hardware Charge Meter]] | * 0x55 [[N900 Hardware Charge Meter]] | ||
| + | * 0x6B [[N900 Hardware Battery Charger]] | ||
| + | |||
| + | smia-sensor/2-0010 | ||
==Bus 3== | ==Bus 3== | ||
Revision as of 16:46, 7 June 2010
Contents |
Hardware
Bus 1
- 0x48 0x49 0x4a 0x4b Gaia/chipset
Bus 2
- 0x18 0x19 Audio codec
- 0x29 N900 Hardware Light Meter
- 0x30 N900 Hardware Flash Torch
- 0x32 N900 Hardware LED
- 0x60 N900 Headphone Amplifier
- 0x63 FM receiver
- 0x55 N900 Hardware Charge Meter
- 0x6B N900 Hardware Battery Charger
smia-sensor/2-0010
Bus 3
- 0x0c Lens focus control
- 0x3e Front Camera (control)
- 0x1d Accelerometer
Software
The n900 software driving I2C comes in three flavours.
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.
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).