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struct_ff_periodic_effect
Langue: en
Version: October 2010 (fedora - 01/12/10)
Section: 9 (Appels noyau Linux)
NAME
struct_ff_periodic_effect - defines parameters of a periodic force-feedback effectSYNOPSIS
struct ff_periodic_effect { __u16 waveform; __u16 period; __s16 magnitude; __s16 offset; __u16 phase; struct ff_envelope envelope; __u32 custom_len; __s16 __user * custom_data; };
MEMBERS
waveform
- kind of the effect (wave)
period
- period of the wave (ms)
magnitude
- peak value
offset
- mean value of the wave (roughly)
phase
- 'horizontal' shift
envelope
- envelope data
custom_len
- number of samples (FF_CUSTOM only)
custom_data
- buffer of samples (FF_CUSTOM only)
DESCRIPTION
Known waveforms - FF_SQUARE, FF_TRIANGLE, FF_SINE, FF_SAW_UP, FF_SAW_DOWN, FF_CUSTOM. The exact syntax FF_CUSTOM is undefined for the time being as no driver supports it yet.
NOTE
the data pointed by custom_data is copied by the driver. You can therefore dispose of the memory after the upload/update.
COPYRIGHT
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre