N900 Hardware Bus I2c
(→Hardware) |
(→Hardware) |
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| Line 2: | Line 2: | ||
Bus 1. | Bus 1. | ||
| - | * 0x48 [[N900 Hardware Chipset|Gaia/chipset]] | + | * 0x48 0x49 0x4a 0x4b [[N900 Hardware Chipset|Gaia/chipset]] |
| - | + | ||
| - | + | ||
| - | + | ||
Bus 2. | Bus 2. | ||
| Line 19: | Line 16: | ||
Bus 3. | Bus 3. | ||
| - | * 0x0c [[N900 Hardware | + | * 0x0c [[N900 Hardware Autofocus|Lens focus control]] |
* 0x3e [[N900 Hardware Camera Sensor|Front Camera (control)]] | * 0x3e [[N900 Hardware Camera Sensor|Front Camera (control)]] | ||
* 0x1d [[N900 Hardware Accelerometer|Accelerometer]] | * 0x1d [[N900 Hardware Accelerometer|Accelerometer]] | ||
Revision as of 16:20, 7 June 2010
Hardware
Bus 1.
- 0x48 0x49 0x4a 0x4b Gaia/chipset
Bus 2.
smia-sensor/2-0010
- 0x18 0x19 Audio codec
- 0x30 N900 Hardware Flash Torch
- 0x63 FM receiver
- 0x60 N900 Headphone Amplifier
- 0x32 N900 Hardware LED
Bus 3.
- 0x0c Lens focus control
- 0x3e Front Camera (control)
- 0x1d Accelerometer
/sys/bus/i2c/drivers# ls -d */*-*
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).