L3G4200D gyroscope

Device driver for the L3G4200D gyroscope More...

Detailed Description

Device driver for the L3G4200D gyroscope

This driver provides [S]ensor [A]ctuator [U]ber [L]ayer capabilities.

Note

The current state of the driver only implements a very basic polling mode.

Topics
	L3G4200D gyroscope driver compile configuration

Files
file	l3g4200d.h
	Device driver interface for the L3G4200D gyroscope.
file	l3g4200d-regs.h
	Definitions for the L3G4200D gyroscope.
file	l3g4200d_params.h
	Default configuration for L3G4200D devices.

Data Structures
struct	l3g4200d_data_t
	Result vector for gyro measurement. More...
struct	l3g4200d_params_t
	Device initialization parameters. More...
struct	l3g4200d_t
	Device descriptor for L3G4200D sensors. More...

Enumerations
enum	l3g4200d_scale_t { L3G4200D_SCALE_250DPS = 0x0 , L3G4200D_SCALE_500DPS = 0x1 , L3G4200D_SCALE_2000DPS = 0x2 }
	Measurement scale for the gyro. More...
enum	l3g4200d_mode_t {   L3G4200D_MODE_100_12 = 0x0 , L3G4200D_MODE_100_25 = 0x1 , L3G4200D_MODE_200_12 = 0x4 , L3G4200D_MODE_200_25 = 0x5 ,   L3G4200D_MODE_200_50 = 0x6 , L3G4200D_MODE_200_70 = 0x7 , L3G4200D_MODE_400_20 = 0x8 , L3G4200D_MODE_400_25 = 0x9 ,   L3G4200D_MODE_400_50 = 0xa , L3G4200D_MODE_400_110 = 0xb , L3G4200D_MODE_800_30 = 0xc , L3G4200D_MODE_800_35 = 0xd ,   L3G4200D_MODE_800_50 = 0xe , L3G4200D_MODE_800_110 = 0xf }
	Sampling frequency and bandwidth settings for the gyro. More...

Functions
int	l3g4200d_init (l3g4200d_t *dev, const l3g4200d_params_t *params)
	Initialize a gyro.
int	l3g4200d_read (const l3g4200d_t *dev, l3g4200d_data_t *acc_data)
	Read angular speed value in degree per second from gyro.
int	l3g4200d_enable (const l3g4200d_t *dev)
	Power-up the given device.
int	l3g4200d_disable (const l3g4200d_t *dev)
	Power-down the given device.

Enumeration Type Documentation

l3g4200d_mode_t

enum l3g4200d_mode_t

Sampling frequency and bandwidth settings for the gyro.

Enumerator
L3G4200D_MODE_100_12	data rate: 100Hz, cut-off: 12.5Hz
L3G4200D_MODE_100_25	data rate: 100Hz, cut-off: 25Hz
L3G4200D_MODE_200_12	data rate: 200Hz, cut-off: 12.5Hz
L3G4200D_MODE_200_25	data rate: 200Hz, cut-off: 25Hz
L3G4200D_MODE_200_50	data rate: 200Hz, cut-off: 50Hz
L3G4200D_MODE_200_70	data rate: 200Hz, cut-off: 70Hz
L3G4200D_MODE_400_20	data rate: 400Hz, cut-off: 20Hz
L3G4200D_MODE_400_25	data rate: 400Hz, cut-off: 25Hz
L3G4200D_MODE_400_50	data rate: 400Hz, cut-off: 50Hz
L3G4200D_MODE_400_110	data rate: 400Hz, cut-off: 110Hz
L3G4200D_MODE_800_30	data rate: 800Hz, cut-off: 30Hz
L3G4200D_MODE_800_35	data rate: 800Hz, cut-off: 35Hz
L3G4200D_MODE_800_50	data rate: 800Hz, cut-off: 50Hz
L3G4200D_MODE_800_110	data rate: 800Hz, cut-off: 110Hz

Definition at line 78 of file l3g4200d.h.

l3g4200d_scale_t

enum l3g4200d_scale_t

Measurement scale for the gyro.

Enumerator
L3G4200D_SCALE_250DPS	scale: 250 degree per second
L3G4200D_SCALE_500DPS	scale: 500 degree per second
L3G4200D_SCALE_2000DPS	scale: 2000 degree per second

Definition at line 69 of file l3g4200d.h.

Function Documentation

l3g4200d_disable()

int l3g4200d_disable

(

const l3g4200d_t *

dev

)

Power-down the given device.

Parameters

[in]

dev

device to power-down

Returns

0 on success

-1 on error

l3g4200d_enable()

int l3g4200d_enable

(

const l3g4200d_t *

dev

)

Power-up the given device.

Parameters

[in]

dev

device to enable

Returns

0 on success

-1 on error

l3g4200d_init()

int l3g4200d_init	(	l3g4200d_t *	dev,
		const l3g4200d_params_t *	params )

Initialize a gyro.

Parameters

[out]	dev	device descriptor of sensor to initialize
[in]	params	initialization parameters

Returns

0 on success

-1 on error

l3g4200d_read()

int l3g4200d_read	(	const l3g4200d_t *	dev,
		l3g4200d_data_t *	acc_data )

Read angular speed value in degree per second from gyro.

Parameters

[in]	dev	device descriptor of gyro
[out]	acc_data	result vector in dps per axis

Returns

0 on success

-1 on error