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d/psmv: Tick time

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This commit is contained in:
Jakob Bornecrantz 2019-09-11 21:32:40 +01:00
parent b5c37bcf10
commit e82f3616c9
1 changed files with 16 additions and 1 deletions
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17
src/xrt/drivers/psmv/psmv_driver.c
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@ -370,6 +370,20 @@ psmv_device(struct xrt_device *xdev)
return (struct psmv_device *)xdev; return (struct psmv_device *)xdev;
} }
static uint32_t
psmv_calc_delta_and_handle_rollover(uint32_t next, uint32_t last)
{
uint32_t tick_delta = next - last;
// The 16-bit tick counter has rolled over,
// adjust the "negative" value to be positive.
if (tick_delta > 0xffff) {
tick_delta += 0x10000;
}
return tick_delta;
}
static inline uint8_t static inline uint8_t
psmv_clamp_zero_to_one_float_to_u8(float v) psmv_clamp_zero_to_one_float_to_u8(float v)
{ {
@ -544,7 +558,8 @@ psmv_read_hid(struct psmv_device *psmv)
psmv_from_vec3_i16_zn_wire(&input.sample[1].gyro, psmv_from_vec3_i16_zn_wire(&input.sample[1].gyro,
&data.input.gyro_f2); &data.input.gyro_f2);
int32_t diff = input.timestamp - psmv->last.timestamp; uint32_t diff = psmv_calc_delta_and_handle_rollover(
input.timestamp, psmv->last.timestamp);
bool missed = input.seq_no != ((psmv->last.seq_no + 1) & 0x0f); bool missed = input.seq_no != ((psmv->last.seq_no + 1) & 0x0f);
// Update timestamp. // Update timestamp.