IOCTL commands

Collaboration diagram for IOCTL commands:

Macros
#define	SCUIOC_SETFIFO   _SCUIOC(0x0001)
#define	SCUIOC_FREEFIFO   _SCUIOC(0x0002)
#define	SCUIOC_SETSAMPLE   _SCUIOC(0x0003)
#define	SCUIOC_SETSIGNCONV   _SCUIOC(0x0004)
#define	SCUIOC_SETOGADJUST   _SCUIOC(0x0005)
#define	SCUIOC_CLROGADJUST   _SCUIOC(0x0006)
#define	SCUIOC_SETFILTER   _SCUIOC(0x0007)
#define	SCUIOC_SETNOTIFY   _SCUIOC(0x0008)
#define	SCUIOC_SETELEMENTS   _SCUIOC(0x0009)
#define	SCUIOC_SETDECIMATION   _SCUIOC(0x000a)
#define	SCUIOC_SETWATERMARK   _SCUIOC(0x000b)
#define	SCUIOC_START   _SCUIOC(0x0010)
#define	SCUIOC_STOP   _SCUIOC(0x0011)
#define	SCUIOC_SETFIFOMODE   _SCUIOC(0x0012)
#define	SCUIOC_DELFIFODATA   _SCUIOC(0x0013)

Detailed Description

Macro Definition Documentation

SCUIOC_SETFIFO

#define SCUIOC_SETFIFO   _SCUIOC(0x0001)

Set FIFO size used by sequencer

Parameters

uint16_t

FIFO size in bytes

Returns

ioctl return value provides success/failure indication

SCUIOC_FREEFIFO

#define SCUIOC_FREEFIFO   _SCUIOC(0x0002)

Free FIFO used by sequencer

Parameters

None

Returns

ioctl return value provides success/failure indication

SCUIOC_SETSAMPLE

#define SCUIOC_SETSAMPLE   _SCUIOC(0x0003)

Set sequencer sampling rate

Parameters

uint8_t

sampling rate

Returns

ioctl return value provides success/failure indication

SCUIOC_SETSIGNCONV

#define SCUIOC_SETSIGNCONV   _SCUIOC(0x0004)

Enable/Disable sign conversion preprocessing

Parameters

unsigned

long: 0 = disable, 1 = enable

Returns

ioctl return value provides success/failure indication

SCUIOC_SETOGADJUST

#define SCUIOC_SETOGADJUST   _SCUIOC(0x0005)

Set offset/gain adjustment parameter

Parameters

Pointer

to struct adjust_xyz_s.

Returns

ioctl return value provides success/failure indication

SCUIOC_CLROGADJUST

#define SCUIOC_CLROGADJUST   _SCUIOC(0x0006)

Clear offset/gain adjustment parameter

Parameters

None

Returns

ioctl return value provides success/failure indication

SCUIOC_SETFILTER

#define SCUIOC_SETFILTER   _SCUIOC(0x0007)

Set IIR filter coefficiencies

Parameters

Pointer

to struct math_filter_s

Returns

ioctl return value provides success/failure indication

SCUIOC_SETNOTIFY

#define SCUIOC_SETNOTIFY   _SCUIOC(0x0008)

Set event notifier parameters

Set event notifier. This command must use with IIR filter, so it will be error when no filter set by SCUIOC_SETFILTER.

Parameters

Pointer

to struct scuev_notify_s

Returns

ioctl return value provides success/failure indication

SCUIOC_SETELEMENTS

#define SCUIOC_SETELEMENTS   _SCUIOC(0x0009)

Set elements per sample

SCU can be treat 3 axis sample data as 1 or 2 axis data. For example, user can be used to detect via event notifier, about the board is tilting, by X and Y axis data from accelerometer. This setting will be affected for IIR Filter and event notifier.

Parameters

unsigned

long: 1 - 3

Returns

ioctl return value provides success/failure indication

SCUIOC_SETDECIMATION

#define SCUIOC_SETDECIMATION   _SCUIOC(0x000a)

Set decimation parameters (Decimator only)

Parameters

Pointer

to struct decimation_s

Returns

ioctl return value provides success/failure indication

SCUIOC_SETWATERMARK

#define SCUIOC_SETWATERMARK   _SCUIOC(0x000b)

Set FIFO sample data watermark

Parameters

Pointer

of struct scufifo_wm_s

Returns

ioctl return value provides success/failure indication

SCUIOC_START

#define SCUIOC_START   _SCUIOC(0x0010)

Start sequencer

Parameters

None

Returns

ioctl return value provides success/failure indication

SCUIOC_STOP

#define SCUIOC_STOP   _SCUIOC(0x0011)

Stop sequencer

Parameters

None

Returns

ioctl return value provides success/failure indication

SCUIOC_SETFIFOMODE

#define SCUIOC_SETFIFOMODE   _SCUIOC(0x0012)

Set FIFO overwrite mode

Parameters

unsigned

long: 0 = overwrite disable, 1 = overwrite enable

Returns

ioctl return value provides success/failure indication

SCUIOC_DELFIFODATA

#define SCUIOC_DELFIFODATA   _SCUIOC(0x0013)

Delete FIFO data

Parameters

uint16_t

delete size

Returns

ioctl return value provides success/failure indication