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vl53l0: improve offset/xtalk calibration time

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reduce vl53l0 calibration time to less than 1s

Change-Id: Ia7ce65797e5b88d46ed883bb2e360be0d66a86b2
Signed-off-by: wangdw10 <wangdw10@lenovo.com>
Reviewed-on: https://gerrit.mot.com/1380167
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Dawei Wang <wangdw10@motorola.com>
Reviewed-by: <liuwang1@lenovo.com>
Reviewed-by: Chuanxin Guo <guocx4@motorola.com>
Reviewed-by: Jianqi Yang <yangj@motorola.com>
Submit-Approved: Jira Key
This commit is contained in:
wangdw10 2019-07-02 17:56:18 +08:00 • committed by Dawei Wang
commit 3f79599b45
1 changed files with 17 additions and 4 deletions
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21
drivers/input/misc/vl53L0/src/vl53l0_api_calibration.c
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@ -80,13 +80,13 @@ VL53L0_Error VL53L0_perform_xtalk_calibration(VL53L0_DEV Dev,
VL53L0_CHECKENABLE_RANGE_IGNORE_THRESHOLD, 0);
}
/* Perform 50 measurements and compute the averages */
/* Perform 12 measurements and compute the averages */
if (Status == VL53L0_ERROR_NONE) {
sum_ranging = 0;
sum_spads = 0;
sum_signalRate = 0;
total_count = 0;
for (xtalk_meas = 0; xtalk_meas < 50; xtalk_meas++) {
for (xtalk_meas = 0; xtalk_meas < 12; xtalk_meas++) {
Status = VL53L0_PerformSingleRangingMeasurement(Dev,
&RangingMeasurementData);
@ -203,6 +203,8 @@ VL53L0_Error VL53L0_perform_offset_calibration(VL53L0_DEV Dev,
uint32_t CalDistanceAsInt_mm;
uint8_t SequenceStepEnabled;
int meas = 0;
uint32_t oldMeasurementTimingBudgetMicroSeconds;
uint32_t MeasurementTimingBudgetMicroSeconds = 100000;
if (CalDistanceMilliMeter <= 0)
Status = VL53L0_ERROR_INVALID_PARAMS;
@ -228,11 +230,19 @@ VL53L0_Error VL53L0_perform_offset_calibration(VL53L0_DEV Dev,
Status = VL53L0_SetLimitCheckEnable(Dev,
VL53L0_CHECKENABLE_RANGE_IGNORE_THRESHOLD, 0);
/* Perform 50 measurements and compute the averages */
if (Status == VL53L0_ERROR_NONE)
Status = VL53L0_GetMeasurementTimingBudgetMicroSeconds(Dev,
&oldMeasurementTimingBudgetMicroSeconds);
if (Status == VL53L0_ERROR_NONE)
Status = VL53L0_SetMeasurementTimingBudgetMicroSeconds(Dev,
MeasurementTimingBudgetMicroSeconds);
/* Perform 3 measurements and compute the averages */
if (Status == VL53L0_ERROR_NONE) {
sum_ranging = 0;
total_count = 0;
for (meas = 0; meas < 50; meas++) {
for (meas = 0; meas < 3; meas++) {
Status = VL53L0_PerformSingleRangingMeasurement(Dev,
&RangingMeasurementData);
@ -252,6 +262,9 @@ VL53L0_Error VL53L0_perform_offset_calibration(VL53L0_DEV Dev,
Status = VL53L0_ERROR_RANGE_ERROR;
}
if (Status == VL53L0_ERROR_NONE)
Status = VL53L0_SetMeasurementTimingBudgetMicroSeconds(Dev,
oldMeasurementTimingBudgetMicroSeconds);
if (Status == VL53L0_ERROR_NONE) {
/* FixPoint1616_t / uint16_t = FixPoint1616_t */