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Improve PID (force feedback) implementation

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Honor the effect duration
This commit is contained in:
Raphael Assenat 2018-09-18 14:34:38 -04:00
parent f5e268fb19
commit c7992e5334
2 changed files with 23 additions and 7 deletions
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29
usbpad.c
View File

@ -396,12 +396,13 @@ uint8_t usbpad_hid_set_report(struct usbpad *pad, const struct usb_request *rq,
break;
case REPORT_SET_EFFECT:
pad->_FFB_effect_index = data[1];
printf_P(PSTR("set effect %d\r\n"), data[1]);
pad->_FFB_effect_duration = data[3] | (data[4]<<8);
printf_P(PSTR("set effect %d. duration: %u\r\n"), data[1], pad->_FFB_effect_duration);
hexdump(data, len);
break;
case REPORT_SET_PERIODIC:
pad->periodic_magnitude = data[2];
printf_P(PSTR("periodic mag: %d\r\n"), data[2]);
printf_P(PSTR("Set periodic - mag: %d, period: %u\r\n"), data[2], data[5] | (data[6]<<8));
hexdump(data, len);
break;
case REPORT_SET_CONSTANT_FORCE:
@ -412,19 +413,33 @@ uint8_t usbpad_hid_set_report(struct usbpad *pad, const struct usb_request *rq,
hexdump(data, len);
break;
case REPORT_EFFECT_OPERATION:
if (len != 4)
if (len != 4) {
printf_P(PSTR("Hey!\r\n"));
return -1;
}
/* Byte 0 : report ID
* Byte 1 : bit 7=rom flag, bits 6-0=effect block index
* Byte 2 : Effect operation
* Byte 3 : Loop count */
// scale this up so vibration stays on longer.
// main.c uses a 16ms interval timer for vibration "loops"
pad->_loop_count = (data[3])*1;
printf_P(PSTR("EFFECT OP: rom=%s, idx=0x%02x : "), data[1] & 0x80 ? "Yes":"No", data[1] & 0x7F);
// With dolphin, an "infinite" duration is set. The effect is started, then never
// stopped. Maybe I misunderstood something? In any case, the following works
// and feels about right.
if (pad->_FFB_effect_duration == 0xffff) {
if (data[3]) {
pad->_loop_count = data[3] + 1; // +1 for a bit more strength
} else {
pad->_loop_count = 0;
}
} else {
// main.c uses a 16ms interval timer for vibration "loops"
pad->_loop_count = (pad->_FFB_effect_duration / 16) * data[3];
printf_P(PSTR("%d loops for %d ms\r\n"), data[3], pad->_loop_count * 16);
}
switch(data[1] & 0x7F) // Effect block index
{
case 1: // constant force
@ -453,7 +468,7 @@ uint8_t usbpad_hid_set_report(struct usbpad *pad, const struct usb_request *rq,
break;
// TODO : should probably drop these from the descriptor since they are
default:
case 2: // ramp
case 5: // triangle
case 6: // sawtooth up

1
usbpad.h
View File

@ -12,6 +12,7 @@ struct usbpad {
unsigned char constant_force;
unsigned char periodic_magnitude;
unsigned short _FFB_effect_duration; // in milliseconds
unsigned char _FFB_effect_index;
#define LOOP_MAX 0xFFFF
unsigned int _loop_count;