mirror of https://github.com/ArduPilot/ardupilot
576 lines
21 KiB
C++
576 lines
21 KiB
C++
/*
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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driver for ST VL53L1X lidar
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Many thanks to Pololu, https://github.com/pololu/vl53l1x-arduino and
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the ST example code
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*/
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#include "AP_RangeFinder_VL53L1X.h"
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#include <utility>
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#include <AP_HAL/AP_HAL.h>
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#include <AP_HAL/utility/sparse-endian.h>
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#include <stdio.h>
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extern const AP_HAL::HAL& hal;
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static const uint8_t MEASUREMENT_TIME_MS = 50; // Start continuous readings at a rate of one measurement every 50 ms
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AP_RangeFinder_VL53L1X::AP_RangeFinder_VL53L1X(RangeFinder::RangeFinder_State &_state, AP_RangeFinder_Params &_params, AP_HAL::OwnPtr<AP_HAL::I2CDevice> _dev)
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: AP_RangeFinder_Backend(_state, _params)
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, dev(std::move(_dev)) {}
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/*
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detect if a VL53L1X rangefinder is connected. We'll detect by
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trying to take a reading on I2C. If we get a result the sensor is
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there.
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*/
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AP_RangeFinder_Backend *AP_RangeFinder_VL53L1X::detect(RangeFinder::RangeFinder_State &_state, AP_RangeFinder_Params &_params, AP_HAL::OwnPtr<AP_HAL::I2CDevice> dev, DistanceMode mode)
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{
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if (!dev) {
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return nullptr;
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}
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AP_RangeFinder_VL53L1X *sensor
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= new AP_RangeFinder_VL53L1X(_state, _params, std::move(dev));
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if (!sensor) {
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delete sensor;
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return nullptr;
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}
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sensor->dev->get_semaphore()->take_blocking();
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if (!sensor->check_id() || !sensor->init(mode)) {
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sensor->dev->get_semaphore()->give();
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delete sensor;
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return nullptr;
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}
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sensor->dev->get_semaphore()->give();
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return sensor;
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}
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// check sensor ID registers
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bool AP_RangeFinder_VL53L1X::check_id(void)
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{
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uint8_t v1, v2;
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if (!(read_register(0x010F, v1) &&
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read_register(0x0110, v2))) {
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return false;
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}
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if ((v1 != 0xEA) ||
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(v2 != 0xCC)) {
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return false;
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}
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printf("Detected VL53L1X on bus 0x%x\n", dev->get_bus_id());
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return true;
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}
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bool AP_RangeFinder_VL53L1X::reset(void) {
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if (!write_register(SOFT_RESET, 0x00)) {
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return false;
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}
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hal.scheduler->delay_microseconds(100);
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if (!write_register(SOFT_RESET, 0x01)) {
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return false;
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}
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hal.scheduler->delay(1000);
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return true;
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}
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/*
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initialise sensor
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*/
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bool AP_RangeFinder_VL53L1X::init(DistanceMode mode)
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{
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// we need to do resets and delays in order to configure the sensor, don't do this if we are trying to fast boot
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if (hal.util->was_watchdog_armed()) {
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return false;
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}
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uint8_t pad_i2c_hv_extsup_config = 0;
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uint16_t mm_config_outer_offset_mm = 0;
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if (!(reset() && // reset the chip, we make assumptions later on that we are on a clean power on of the sensor
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// setup for 2.8V operation
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read_register(PAD_I2C_HV__EXTSUP_CONFIG, pad_i2c_hv_extsup_config) &&
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write_register(PAD_I2C_HV__EXTSUP_CONFIG,
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pad_i2c_hv_extsup_config | 0x01) &&
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// store oscillator info for later use
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read_register16(OSC_MEASURED__FAST_OSC__FREQUENCY, fast_osc_frequency) &&
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read_register16(RESULT__OSC_CALIBRATE_VAL, osc_calibrate_val) &&
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// static config
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write_register16(DSS_CONFIG__TARGET_TOTAL_RATE_MCPS, TargetRate) && // should already be this value after reset
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write_register(GPIO__TIO_HV_STATUS, 0x02) &&
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write_register(SIGMA_ESTIMATOR__EFFECTIVE_PULSE_WIDTH_NS, 8) && // tuning parm default
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write_register(SIGMA_ESTIMATOR__EFFECTIVE_AMBIENT_WIDTH_NS, 16) && // tuning parm default
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write_register(ALGO__CROSSTALK_COMPENSATION_VALID_HEIGHT_MM, 0x01) &&
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write_register(ALGO__RANGE_IGNORE_VALID_HEIGHT_MM, 0xFF) &&
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write_register(ALGO__RANGE_MIN_CLIP, 0) && // tuning parm default
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write_register(ALGO__CONSISTENCY_CHECK__TOLERANCE, 2) && // tuning parm default
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// general config
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write_register16(SYSTEM__THRESH_RATE_HIGH, 0x0000) &&
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write_register16(SYSTEM__THRESH_RATE_LOW, 0x0000) &&
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write_register(DSS_CONFIG__APERTURE_ATTENUATION, 0x38) &&
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// timing config
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write_register16(RANGE_CONFIG__SIGMA_THRESH, 360) && // tuning parm default
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write_register16(RANGE_CONFIG__MIN_COUNT_RATE_RTN_LIMIT_MCPS, 192) && // tuning parm default
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// dynamic config
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write_register(SYSTEM__GROUPED_PARAMETER_HOLD_0, 0x01) &&
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write_register(SYSTEM__GROUPED_PARAMETER_HOLD_1, 0x01) &&
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write_register(SD_CONFIG__QUANTIFIER, 2) && // tuning parm default
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// from VL53L1_preset_mode_timed_ranging_*
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// GPH is 0 after reset, but writing GPH0 and GPH1 above seem to set GPH to 1,
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// and things don't seem to work if we don't set GPH back to 0 (which the API
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// does here).
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write_register(SYSTEM__GROUPED_PARAMETER_HOLD, 0x00) &&
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write_register(SYSTEM__SEED_CONFIG, 1) && // tuning parm default
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// from VL53L1_config_low_power_auto_mode
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write_register(SYSTEM__SEQUENCE_CONFIG, 0x8B) && // VHV, PHASECAL, DSS1, RANGE
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write_register16(DSS_CONFIG__MANUAL_EFFECTIVE_SPADS_SELECT, 200 << 8) &&
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write_register(DSS_CONFIG__ROI_MODE_CONTROL, 2) && // REQUESTED_EFFFECTIVE_SPADS
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read_register16(MM_CONFIG__OUTER_OFFSET_MM, mm_config_outer_offset_mm) &&
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setDistanceMode(mode) &&
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setMeasurementTimingBudget(40000) &&
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// the API triggers this change in VL53L1_init_and_start_range() once a
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// measurement is started; assumes MM1 and MM2 are disabled
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write_register16(ALGO__PART_TO_PART_RANGE_OFFSET_MM, mm_config_outer_offset_mm * 4) &&
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// set continuous mode
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startContinuous(MEASUREMENT_TIME_MS)
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)) {
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return false;
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}
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// call timer() every MEASUREMENT_TIME_MS. We expect new data to be available every MEASUREMENT_TIME_MS
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dev->register_periodic_callback(MEASUREMENT_TIME_MS * 1000,
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FUNCTOR_BIND_MEMBER(&AP_RangeFinder_VL53L1X::timer, void));
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return true;
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}
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// set distance mode to Short, Medium, or Long
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// based on VL53L1_SetDistanceMode()
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bool AP_RangeFinder_VL53L1X::setDistanceMode(DistanceMode distance_mode)
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{
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// save existing timing budget
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uint32_t budget_us = 0;
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if (!getMeasurementTimingBudget(budget_us)) {
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return false;
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}
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switch (distance_mode) {
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case DistanceMode::Short:
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// from VL53L1_preset_mode_standard_ranging_short_range()
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if (!(// timing config
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write_register(RANGE_CONFIG__VCSEL_PERIOD_A, 0x07) &&
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write_register(RANGE_CONFIG__VCSEL_PERIOD_B, 0x05) &&
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write_register(RANGE_CONFIG__VALID_PHASE_HIGH, 0x38) &&
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// dynamic config
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write_register(SD_CONFIG__WOI_SD0, 0x07) &&
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write_register(SD_CONFIG__WOI_SD1, 0x05) &&
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write_register(SD_CONFIG__INITIAL_PHASE_SD0, 6) && // tuning parm default
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write_register(SD_CONFIG__INITIAL_PHASE_SD1, 6))) { // tuning parm default
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return false;
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}
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break;
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case DistanceMode::Medium:
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// from VL53L1_preset_mode_standard_ranging()
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if (!(// timing config
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write_register(RANGE_CONFIG__VCSEL_PERIOD_A, 0x0B) &&
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write_register(RANGE_CONFIG__VCSEL_PERIOD_B, 0x09) &&
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write_register(RANGE_CONFIG__VALID_PHASE_HIGH, 0x78) &&
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// dynamic config
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write_register(SD_CONFIG__WOI_SD0, 0x0B) &&
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write_register(SD_CONFIG__WOI_SD1, 0x09) &&
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write_register(SD_CONFIG__INITIAL_PHASE_SD0, 10) && // tuning parm default
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write_register(SD_CONFIG__INITIAL_PHASE_SD1, 10))) { // tuning parm default
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return false;
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}
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break;
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case DistanceMode::Long:
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// from VL53L1_preset_mode_standard_ranging_long_range()
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if (!(// timing config
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write_register(RANGE_CONFIG__VCSEL_PERIOD_A, 0x0F) &&
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write_register(RANGE_CONFIG__VCSEL_PERIOD_B, 0x0D) &&
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write_register(RANGE_CONFIG__VALID_PHASE_HIGH, 0xB8) &&
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// dynamic config
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write_register(SD_CONFIG__WOI_SD0, 0x0F) &&
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write_register(SD_CONFIG__WOI_SD1, 0x0D) &&
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write_register(SD_CONFIG__INITIAL_PHASE_SD0, 14) && // tuning parm default
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write_register(SD_CONFIG__INITIAL_PHASE_SD1, 14))) { // tuning parm default
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return false;
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}
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break;
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default:
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// unrecognized mode - do nothing
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return false;
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}
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// reapply timing budget
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return setMeasurementTimingBudget(budget_us);
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}
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// Set the measurement timing budget in microseconds, which is the time allowed
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// for one measurement. A longer timing budget allows for more accurate measurements.
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// based on VL53L1_SetMeasurementTimingBudgetMicroSeconds()
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bool AP_RangeFinder_VL53L1X::setMeasurementTimingBudget(uint32_t budget_us)
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{
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// assumes PresetMode is LOWPOWER_AUTONOMOUS
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if (budget_us <= TimingGuard) {
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return false;
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}
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uint32_t range_config_timeout_us = budget_us - TimingGuard;
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if (range_config_timeout_us > 1100000) {
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return false; // FDA_MAX_TIMING_BUDGET_US * 2
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}
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range_config_timeout_us /= 2;
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// VL53L1_calc_timeout_register_values() begin
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uint8_t range_config_vcsel_period = 0;
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if (!read_register(RANGE_CONFIG__VCSEL_PERIOD_A, range_config_vcsel_period)) {
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return false;
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}
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// "Update Macro Period for Range A VCSEL Period"
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uint32_t macro_period_us = calcMacroPeriod(range_config_vcsel_period);
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// "Update Phase timeout - uses Timing A"
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// Timeout of 1000 is tuning parm default (TIMED_PHASECAL_CONFIG_TIMEOUT_US_DEFAULT)
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// via VL53L1_get_preset_mode_timing_cfg().
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uint32_t phasecal_timeout_mclks = timeoutMicrosecondsToMclks(1000, macro_period_us);
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if (phasecal_timeout_mclks > 0xFF) {
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phasecal_timeout_mclks = 0xFF;
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}
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if (!( write_register(PHASECAL_CONFIG__TIMEOUT_MACROP, phasecal_timeout_mclks) &&
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// "Update MM Timing A timeout"
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// Timeout of 1 is tuning parm default (LOWPOWERAUTO_MM_CONFIG_TIMEOUT_US_DEFAULT)
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// via VL53L1_get_preset_mode_timing_cfg(). With the API, the register
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// actually ends up with a slightly different value because it gets assigned,
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// retrieved, recalculated with a different macro period, and reassigned,
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// but it probably doesn't matter because it seems like the MM ("mode
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// mitigation"?) sequence steps are disabled in low power auto mode anyway.
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write_register16(MM_CONFIG__TIMEOUT_MACROP_A, encodeTimeout(
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timeoutMicrosecondsToMclks(1, macro_period_us))) &&
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// "Update Range Timing A timeout"
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write_register16(RANGE_CONFIG__TIMEOUT_MACROP_A, encodeTimeout(
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timeoutMicrosecondsToMclks(range_config_timeout_us, macro_period_us))) &&
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// "Update Macro Period for Range B VCSEL Period"
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read_register(RANGE_CONFIG__VCSEL_PERIOD_B, range_config_vcsel_period)
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)) {
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return false;
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}
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// "Update Macro Period for Range B VCSEL Period"
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macro_period_us = calcMacroPeriod(range_config_vcsel_period);
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// "Update MM Timing B timeout"
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// (See earlier comment about MM Timing A timeout.)
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return write_register16(MM_CONFIG__TIMEOUT_MACROP_B, encodeTimeout(
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timeoutMicrosecondsToMclks(1, macro_period_us))) &&
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// "Update Range Timing B timeout"
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write_register16(RANGE_CONFIG__TIMEOUT_MACROP_B, encodeTimeout(
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timeoutMicrosecondsToMclks(range_config_timeout_us, macro_period_us)));
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}
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// Get the measurement timing budget in microseconds
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// based on VL53L1_SetMeasurementTimingBudgetMicroSeconds()
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bool AP_RangeFinder_VL53L1X::getMeasurementTimingBudget(uint32_t &budget)
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{
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// assumes PresetMode is LOWPOWER_AUTONOMOUS and these sequence steps are
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// enabled: VHV, PHASECAL, DSS1, RANGE
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// "Update Macro Period for Range A VCSEL Period"
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uint8_t range_config_vcsel_period_a = 0;
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if (!read_register(RANGE_CONFIG__VCSEL_PERIOD_A, range_config_vcsel_period_a)) {
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return false;
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}
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uint32_t macro_period_us = calcMacroPeriod(range_config_vcsel_period_a);
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uint16_t timeout_macrop_a = 0;
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if (!read_register16(RANGE_CONFIG__TIMEOUT_MACROP_A, timeout_macrop_a)) {
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return false;
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}
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// "Get Range Timing A timeout"
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uint32_t range_config_timeout_us = timeoutMclksToMicroseconds(decodeTimeout(timeout_macrop_a), macro_period_us);
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budget = 2 * range_config_timeout_us + TimingGuard;
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return true;
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}
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// Start continuous ranging measurements, with the given inter-measurement
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// period in milliseconds determining how often the sensor takes a measurement.
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bool AP_RangeFinder_VL53L1X::startContinuous(uint32_t period_ms)
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{
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// fix for actual measurement period shorter than set
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uint32_t adjusted_period_ms = period_ms + (period_ms * 64 / 1000);
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// from VL53L1_set_inter_measurement_period_ms()
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return write_register32(SYSTEM__INTERMEASUREMENT_PERIOD, adjusted_period_ms * osc_calibrate_val) &&
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write_register(SYSTEM__INTERRUPT_CLEAR, 0x01) && // sys_interrupt_clear_range
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write_register(SYSTEM__MODE_START, 0x40); // mode_range__timed
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}
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// Decode sequence step timeout in MCLKs from register value
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// based on VL53L1_decode_timeout()
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uint32_t AP_RangeFinder_VL53L1X::decodeTimeout(uint16_t reg_val)
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{
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return ((uint32_t)(reg_val & 0xFF) << (reg_val >> 8)) + 1;
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}
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// Encode sequence step timeout register value from timeout in MCLKs
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// based on VL53L1_encode_timeout()
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uint16_t AP_RangeFinder_VL53L1X::encodeTimeout(uint32_t timeout_mclks)
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{
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// encoded format: "(LSByte * 2^MSByte) + 1"
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uint32_t ls_byte = 0;
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uint16_t ms_byte = 0;
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if (timeout_mclks > 0) {
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ls_byte = timeout_mclks - 1;
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while ((ls_byte & 0xFFFFFF00) > 0) {
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ls_byte >>= 1;
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ms_byte++;
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}
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return (ms_byte << 8) | (ls_byte & 0xFF);
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}
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else {
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return 0;
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}
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}
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// Convert sequence step timeout from macro periods to microseconds with given
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// macro period in microseconds (12.12 format)
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// based on VL53L1_calc_timeout_us()
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uint32_t AP_RangeFinder_VL53L1X::timeoutMclksToMicroseconds(uint32_t timeout_mclks, uint32_t macro_period_us)
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{
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return ((uint64_t)timeout_mclks * macro_period_us + 0x800) >> 12;
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}
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// Convert sequence step timeout from microseconds to macro periods with given
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// macro period in microseconds (12.12 format)
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// based on VL53L1_calc_timeout_mclks()
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uint32_t AP_RangeFinder_VL53L1X::timeoutMicrosecondsToMclks(uint32_t timeout_us, uint32_t macro_period_us)
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{
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return (((uint32_t)timeout_us << 12) + (macro_period_us >> 1)) / macro_period_us;
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}
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// Calculate macro period in microseconds (12.12 format) with given VCSEL period
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// assumes fast_osc_frequency has been read and stored
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// based on VL53L1_calc_macro_period_us()
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uint32_t AP_RangeFinder_VL53L1X::calcMacroPeriod(uint8_t vcsel_period)
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{
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// from VL53L1_calc_pll_period_us()
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// fast osc frequency in 4.12 format; PLL period in 0.24 format
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uint32_t pll_period_us = ((uint32_t)0x01 << 30) / fast_osc_frequency;
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// from VL53L1_decode_vcsel_period()
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uint8_t vcsel_period_pclks = (vcsel_period + 1) << 1;
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// VL53L1_MACRO_PERIOD_VCSEL_PERIODS = 2304
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uint32_t macro_period_us = (uint32_t)2304 * pll_period_us;
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macro_period_us >>= 6;
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macro_period_us *= vcsel_period_pclks;
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macro_period_us >>= 6;
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return macro_period_us;
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}
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// "Setup ranges after the first one in low power auto mode by turning off
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// FW calibration steps and programming static values"
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// based on VL53L1_low_power_auto_setup_manual_calibration()
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bool AP_RangeFinder_VL53L1X::setupManualCalibration(void)
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{
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uint8_t saved_vhv_init = 0;
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uint8_t saved_vhv_timeout = 0;
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uint8_t phasecal_result_vcsel_start = 0;
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return // "save original vhv configs"
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read_register(VHV_CONFIG__INIT, saved_vhv_init) &&
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read_register(VHV_CONFIG__TIMEOUT_MACROP_LOOP_BOUND, saved_vhv_timeout) &&
|
|
|
|
// "disable VHV init"
|
|
write_register(VHV_CONFIG__INIT, saved_vhv_init & 0x7F) &&
|
|
|
|
// "set loop bound to tuning param"
|
|
write_register(VHV_CONFIG__TIMEOUT_MACROP_LOOP_BOUND,
|
|
(saved_vhv_timeout & 0x03) + (3 << 2)) && // tuning parm default (LOWPOWERAUTO_VHV_LOOP_BOUND_DEFAULT)
|
|
|
|
// "override phasecal"
|
|
write_register(PHASECAL_CONFIG__OVERRIDE, 0x01) &&
|
|
read_register(PHASECAL_RESULT__VCSEL_START, phasecal_result_vcsel_start) &&
|
|
write_register(CAL_CONFIG__VCSEL_START, phasecal_result_vcsel_start);
|
|
}
|
|
|
|
// check if sensor has new reading available
|
|
// assumes interrupt is active low (GPIO_HV_MUX__CTRL bit 4 is 1)
|
|
bool AP_RangeFinder_VL53L1X::dataReady(void)
|
|
{
|
|
uint8_t gpio_tio_hv_status = 0;
|
|
|
|
return read_register(GPIO__TIO_HV_STATUS, gpio_tio_hv_status) &&
|
|
((gpio_tio_hv_status & 0x01) == 0);
|
|
}
|
|
|
|
// read - return last value measured by sensor
|
|
bool AP_RangeFinder_VL53L1X::get_reading(uint16_t &reading_mm)
|
|
{
|
|
uint8_t tries = 10;
|
|
while (!dataReady()) {
|
|
tries--;
|
|
hal.scheduler->delay(1);
|
|
if (tries == 0) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
uint8_t range_status = 0;
|
|
|
|
if (!(read_register(RESULT__RANGE_STATUS, range_status) &&
|
|
read_register16(RESULT__FINAL_CROSSTALK_CORRECTED_RANGE_MM_SD0, reading_mm))) {
|
|
return false;
|
|
}
|
|
|
|
// "apply correction gain"
|
|
// gain factor of 2011 is tuning parm default (VL53L1_TUNINGPARM_LITE_RANGING_GAIN_FACTOR_DEFAULT)
|
|
// Basically, this appears to scale the result by 2011/2048, or about 98%
|
|
// (with the 1024 added for proper rounding).
|
|
reading_mm = ((uint32_t)reading_mm * 2011 + 0x0400) / 0x0800;
|
|
|
|
if (!write_register(SYSTEM__INTERRUPT_CLEAR, 0x01)) { // sys_interrupt_clear_range
|
|
return false;
|
|
}
|
|
|
|
switch ((DeviceError)range_status) {
|
|
case RANGECOMPLETE:
|
|
break;
|
|
|
|
default:
|
|
#ifdef VL53L1X_DEBUG
|
|
hal.console->printf("VL53L1X: %d ms status %d\n", AP_HAL::millis(), (int)range_status);
|
|
#endif // VL53L1X_DEBUG
|
|
return false;
|
|
}
|
|
|
|
if (!calibrated) {
|
|
calibrated = setupManualCalibration();
|
|
}
|
|
|
|
return calibrated;
|
|
}
|
|
|
|
bool AP_RangeFinder_VL53L1X::read_register(uint16_t reg, uint8_t &value)
|
|
{
|
|
uint8_t b[2] = { uint8_t(reg >> 8), uint8_t(reg & 0xFF) };
|
|
return dev->transfer(b, 2, &value, 1);
|
|
}
|
|
|
|
bool AP_RangeFinder_VL53L1X::read_register16(uint16_t reg, uint16_t & value)
|
|
{
|
|
uint16_t v = 0;
|
|
uint8_t b[2] = { uint8_t(reg >> 8), uint8_t(reg & 0xFF) };
|
|
if (!dev->transfer(b, 2, (uint8_t *)&v, 2)) {
|
|
return false;
|
|
}
|
|
value = be16toh(v);
|
|
return true;
|
|
}
|
|
|
|
bool AP_RangeFinder_VL53L1X::write_register(uint16_t reg, uint8_t value)
|
|
{
|
|
uint8_t b[3] = { uint8_t(reg >> 8), uint8_t(reg & 0xFF), value };
|
|
return dev->transfer(b, 3, nullptr, 0);
|
|
}
|
|
|
|
bool AP_RangeFinder_VL53L1X::write_register16(uint16_t reg, uint16_t value)
|
|
{
|
|
uint8_t b[4] = { uint8_t(reg >> 8), uint8_t(reg & 0xFF), uint8_t(value >> 8), uint8_t(value & 0xFF) };
|
|
return dev->transfer(b, 4, nullptr, 0);
|
|
}
|
|
|
|
bool AP_RangeFinder_VL53L1X::write_register32(uint16_t reg, uint32_t value)
|
|
{
|
|
uint8_t b[6] = { uint8_t(reg >> 8),
|
|
uint8_t(reg & 0xFF),
|
|
uint8_t((value >> 24) & 0xFF),
|
|
uint8_t((value >> 16) & 0xFF),
|
|
uint8_t((value >> 8) & 0xFF),
|
|
uint8_t((value) & 0xFF) };
|
|
return dev->transfer(b, 6, nullptr, 0);
|
|
}
|
|
|
|
/*
|
|
timer called at 20Hz
|
|
*/
|
|
void AP_RangeFinder_VL53L1X::timer(void)
|
|
{
|
|
uint16_t range_mm;
|
|
if ((get_reading(range_mm)) && (range_mm <= 4000)) {
|
|
WITH_SEMAPHORE(_sem);
|
|
sum_mm += range_mm;
|
|
counter++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
update the state of the sensor
|
|
*/
|
|
void AP_RangeFinder_VL53L1X::update(void)
|
|
{
|
|
WITH_SEMAPHORE(_sem);
|
|
if (counter > 0) {
|
|
state.distance_cm = sum_mm / (10*counter);
|
|
state.last_reading_ms = AP_HAL::millis();
|
|
update_status();
|
|
sum_mm = 0;
|
|
counter = 0;
|
|
} else if (AP_HAL::millis() - state.last_reading_ms > 200) {
|
|
// if no updates for 0.2s set no-data
|
|
set_status(RangeFinder::Status::NoData);
|
|
}
|
|
}
|