SYNOPSIS

struct ff_envelope {
__u16 attack_length;
__u16 attack_level;
__u16 fade_length;
__u16 fade_level;
};

MEMBERS

attack_length

duration of the attack (ms)

attack_level

level at the beginning of the attack

fade_length

duration of fade (ms)

fade_level

level at the end of fade

DESCRIPTION

The attack_level and fade_level are absolute values; when applying envelope force-feedback core will convert to positive/negative value based on polarity of the default level of the effect. Valid range for the attack and fade levels is 0x0000 - 0x7fff

COPYRIGHT