This library allows you to read from multiple VL53L1X sensors.
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Diff: VL53L1X.cpp
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--- a/VL53L1X.cpp Mon Jul 30 18:45:53 2018 +0000 +++ b/VL53L1X.cpp Wed Aug 08 21:44:33 2018 +0000 @@ -2,13 +2,13 @@ // provided by ST (STSW-IMG007), and some of the explanatory comments are quoted // or paraphrased from the API source code, API user manual (UM2356), and // VL53L1X datasheet. - + #include "VL53L1X.h" #include "mbed.h" - + // Constructors //////////////////////////////////////////////////////////////// -VL53L1X::VL53L1X(PinName SDA, PinName SCL) : - _i2c(SDA,SCL) +VL53L1X::VL53L1X(PinName SDA, PinName SCL, PinName shutDown) : + _i2c(SDA,SCL), _shutDown(shutDown) , io_timeout(0) // no timeout , did_timeout(false) , calibrated(false) @@ -24,15 +24,17 @@ : address(AddressDefault) { }*/ - + // Public Methods ////////////////////////////////////////////////////////////// - + void VL53L1X::setAddress(uint8_t new_addr) { writeReg(I2C_SLAVE__DEVICE_ADDRESS, new_addr & 0x7F); - address = new_addr; + wait(.01); + printf("%x\r\n", readReg(I2C_SLAVE__DEVICE_ADDRESS)); + address = new_addr << 1; } - + // Initialize sensor using settings taken mostly from VL53L1_DataInit() and // VL53L1_StaticInit(). // If io_2v8 (optional) is true or not given, the sensor is configured for 2V8 @@ -45,17 +47,17 @@ if (tempRegister != 0xEACC) { return false; } - + // VL53L1_software_reset() begin - + writeReg(SOFT_RESET, 0x00); wait(.001); writeReg(SOFT_RESET, 0x01); - + // VL53L1_poll_for_boot_completion() begin - + startTimeout(); - int firmware = (readReg(FIRMWARE__SYSTEM_STATUS)); + int firmware = (readReg16Bit(FIRMWARE__SYSTEM_STATUS)); printf("firmware : %x\r\n", firmware); while ((readReg(FIRMWARE__SYSTEM_STATUS) & 0x01) == 0) { @@ -67,40 +69,40 @@ } } // VL53L1_poll_for_boot_completion() end - + // VL53L1_software_reset() end - + // VL53L1_DataInit() begin - + // sensor uses 1V8 mode for I/O by default; switch to 2V8 mode if necessary if (io_2v8) { writeReg(PAD_I2C_HV__EXTSUP_CONFIG, readReg(PAD_I2C_HV__EXTSUP_CONFIG) | 0x01); } - + // store oscillator info for later use fast_osc_frequency = readReg16Bit(OSC_MEASURED__FAST_OSC__FREQUENCY); osc_calibrate_val = readReg16Bit(RESULT__OSC_CALIBRATE_VAL); - + // VL53L1_DataInit() end - + // VL53L1_StaticInit() begin - + // Note that the API does not actually apply the configuration settings below // when VL53L1_StaticInit() is called: it keeps a copy of the sensor's // register contents in memory and doesn't actually write them until a // measurement is started. Writing the configuration here means we don't have // to keep it all in memory and avoids a lot of redundant writes later. - + // the API sets the preset mode to LOWPOWER_AUTONOMOUS here: // VL53L1_set_preset_mode() begin - + // VL53L1_preset_mode_standard_ranging() begin - + // values labeled "tuning parm default" are from vl53l1_tuning_parm_defaults.h // (API uses these in VL53L1_init_tuning_parm_storage_struct()) - + // static config // API resets PAD_I2C_HV__EXTSUP_CONFIG here, but maybe we don't want to do // that? (seems like it would disable 2V8 mode) @@ -112,55 +114,55 @@ writeReg(ALGO__RANGE_IGNORE_VALID_HEIGHT_MM, 0xFF); writeReg(ALGO__RANGE_MIN_CLIP, 0); // tuning parm default writeReg(ALGO__CONSISTENCY_CHECK__TOLERANCE, 2); // tuning parm default - + // general config writeReg16Bit(SYSTEM__THRESH_RATE_HIGH, 0x0000); writeReg16Bit(SYSTEM__THRESH_RATE_LOW, 0x0000); writeReg(DSS_CONFIG__APERTURE_ATTENUATION, 0x38); - + // timing config // most of these settings will be determined later by distance and timing // budget configuration writeReg16Bit(RANGE_CONFIG__SIGMA_THRESH, 360); // tuning parm default writeReg16Bit(RANGE_CONFIG__MIN_COUNT_RATE_RTN_LIMIT_MCPS, 192); // tuning parm default - + // dynamic config - + writeReg(SYSTEM__GROUPED_PARAMETER_HOLD_0, 0x01); writeReg(SYSTEM__GROUPED_PARAMETER_HOLD_1, 0x01); writeReg(SD_CONFIG__QUANTIFIER, 2); // tuning parm default - + // VL53L1_preset_mode_standard_ranging() end - + // from VL53L1_preset_mode_timed_ranging_* // GPH is 0 after reset, but writing GPH0 and GPH1 above seem to set GPH to 1, // and things don't seem to work if we don't set GPH back to 0 (which the API // does here). writeReg(SYSTEM__GROUPED_PARAMETER_HOLD, 0x00); writeReg(SYSTEM__SEED_CONFIG, 1); // tuning parm default - + // from VL53L1_config_low_power_auto_mode writeReg(SYSTEM__SEQUENCE_CONFIG, 0x8B); // VHV, PHASECAL, DSS1, RANGE writeReg16Bit(DSS_CONFIG__MANUAL_EFFECTIVE_SPADS_SELECT, 200 << 8); writeReg(DSS_CONFIG__ROI_MODE_CONTROL, 2); // REQUESTED_EFFFECTIVE_SPADS - + // VL53L1_set_preset_mode() end - + // default to long range, 50 ms timing budget // note that this is different than what the API defaults to - setDistanceMode(Long); + setDistanceMode(Short); setMeasurementTimingBudget(50000); - + // VL53L1_StaticInit() end - + // the API triggers this change in VL53L1_init_and_start_range() once a // measurement is started; assumes MM1 and MM2 are disabled writeReg16Bit(ALGO__PART_TO_PART_RANGE_OFFSET_MM, readReg16Bit(MM_CONFIG__OUTER_OFFSET_MM) * 4); - + t.start(); return true; } - + // Write an 8-bit register void VL53L1X::writeReg(uint16_t registerAddr, uint8_t data) { @@ -181,8 +183,20 @@ _i2c.write(address, data_write, 4); } - + // Write a 32-bit register +/* +void VL53L1X::writeReg32Bit(uint16_t registerAddr, uint32_t data) +{ + char data_write[5]; + data_write[0] = (registerAddr >> 8) & 0xFF; //MSB of register address + data_write[1] = registerAddr & 0xFF; //LSB of register address + data_write[2] = (data >> 16) & 0xFF; + data_write[3] = (data >> 8) & 0xFF; + data_write[4] = data & 0xFF; + _i2c.write(address, data_write, 5); +} +*/ void VL53L1X::writeReg32Bit(uint16_t registerAddr, uint32_t data) { char data_write[6]; @@ -193,16 +207,9 @@ data_write[4] = (data >> 8) & 0xFF;; data_write[5] = data & 0xFF; _i2c.write(address, data_write, 6); - // _i2c.beginTransmission(address); - /* _i2c.write((reg >> 8) & 0xFF); // reg high byte - _i2c.write( reg & 0xFF); // reg low byte - _i2c.write((value >> 24) & 0xFF); // value highest byte - _i2c.write((value >> 16) & 0xFF); - _i2c.write((value >> 8) & 0xFF); - _i2c.write( value & 0xFF); // value lowest byte - //last_status = _i2c.endTransmission();*/ } - + + // Read an 8-bit register uint8_t VL53L1X::readReg(uint16_t registerAddr) { @@ -245,7 +252,7 @@ _i2c.write((reg >> 8) & 0xFF); // reg high byte _i2c.write( reg & 0xFF); // reg low byte last_status = _i2c.endTransmission(); - + _i2c.requestFrom(address, (uint8_t)4); value = (uint32_t)_i2c.read() << 24; // value highest byte value |= (uint32_t)_i2c.read() << 16; @@ -254,78 +261,77 @@ */ return value; } - + // set distance mode to Short, Medium, or Long // based on VL53L1_SetDistanceMode() bool VL53L1X::setDistanceMode(DistanceMode mode) { // save existing timing budget uint32_t budget_us = getMeasurementTimingBudget(); - printf("budget_us = %d", budget_us); switch (mode) { case Short: // from VL53L1_preset_mode_standard_ranging_short_range() - + // timing config writeReg(RANGE_CONFIG__VCSEL_PERIOD_A, 0x07); writeReg(RANGE_CONFIG__VCSEL_PERIOD_B, 0x05); writeReg(RANGE_CONFIG__VALID_PHASE_HIGH, 0x38); - + // dynamic config writeReg(SD_CONFIG__WOI_SD0, 0x07); writeReg(SD_CONFIG__WOI_SD1, 0x05); writeReg(SD_CONFIG__INITIAL_PHASE_SD0, 6); // tuning parm default writeReg(SD_CONFIG__INITIAL_PHASE_SD1, 6); // tuning parm default - + break; - + case Medium: // from VL53L1_preset_mode_standard_ranging() - + // timing config writeReg(RANGE_CONFIG__VCSEL_PERIOD_A, 0x0B); writeReg(RANGE_CONFIG__VCSEL_PERIOD_B, 0x09); writeReg(RANGE_CONFIG__VALID_PHASE_HIGH, 0x78); - + // dynamic config writeReg(SD_CONFIG__WOI_SD0, 0x0B); writeReg(SD_CONFIG__WOI_SD1, 0x09); writeReg(SD_CONFIG__INITIAL_PHASE_SD0, 10); // tuning parm default writeReg(SD_CONFIG__INITIAL_PHASE_SD1, 10); // tuning parm default - + break; - + case Long: // long // from VL53L1_preset_mode_standard_ranging_long_range() - + // timing config writeReg(RANGE_CONFIG__VCSEL_PERIOD_A, 0x0F); writeReg(RANGE_CONFIG__VCSEL_PERIOD_B, 0x0D); writeReg(RANGE_CONFIG__VALID_PHASE_HIGH, 0xB8); - + // dynamic config writeReg(SD_CONFIG__WOI_SD0, 0x0F); writeReg(SD_CONFIG__WOI_SD1, 0x0D); writeReg(SD_CONFIG__INITIAL_PHASE_SD0, 14); // tuning parm default writeReg(SD_CONFIG__INITIAL_PHASE_SD1, 14); // tuning parm default - + break; - + default: // unrecognized mode - do nothing return false; } - + // reapply timing budget setMeasurementTimingBudget(budget_us); - + // save mode so it can be returned by getDistanceMode() distance_mode = mode; - + return true; } - + // Set the measurement timing budget in microseconds, which is the time allowed // for one measurement. A longer timing budget allows for more accurate // measurements. @@ -333,28 +339,28 @@ bool VL53L1X::setMeasurementTimingBudget(uint32_t budget_us) { // assumes PresetMode is LOWPOWER_AUTONOMOUS - + if (budget_us <= TimingGuard) { return false; } - + uint32_t range_config_timeout_us = budget_us -= TimingGuard; if (range_config_timeout_us > 1100000) { return false; } // FDA_MAX_TIMING_BUDGET_US * 2 - + range_config_timeout_us /= 2; - + // VL53L1_calc_timeout_register_values() begin - + uint32_t macro_period_us; - + // "Update Macro Period for Range A VCSEL Period" macro_period_us = calcMacroPeriod(readReg(RANGE_CONFIG__VCSEL_PERIOD_A)); - + // "Update Phase timeout - uses Timing A" // Timeout of 1000 is tuning parm default (TIMED_PHASECAL_CONFIG_TIMEOUT_US_DEFAULT) // via VL53L1_get_preset_mode_timing_cfg(). uint32_t phasecal_timeout_mclks = timeoutMicrosecondsToMclks(1000, macro_period_us); if (phasecal_timeout_mclks > 0xFF) { phasecal_timeout_mclks = 0xFF; } writeReg(PHASECAL_CONFIG__TIMEOUT_MACROP, phasecal_timeout_mclks); - + // "Update MM Timing A timeout" // Timeout of 1 is tuning parm default (LOWPOWERAUTO_MM_CONFIG_TIMEOUT_US_DEFAULT) // via VL53L1_get_preset_mode_timing_cfg(). With the API, the register @@ -364,50 +370,49 @@ // mitigation"?) sequence steps are disabled in low power auto mode anyway. writeReg16Bit(MM_CONFIG__TIMEOUT_MACROP_A, encodeTimeout( timeoutMicrosecondsToMclks(1, macro_period_us))); - + // "Update Range Timing A timeout" writeReg16Bit(RANGE_CONFIG__TIMEOUT_MACROP_A, encodeTimeout( timeoutMicrosecondsToMclks(range_config_timeout_us, macro_period_us))); - + // "Update Macro Period for Range B VCSEL Period" macro_period_us = calcMacroPeriod(readReg(RANGE_CONFIG__VCSEL_PERIOD_B)); - + // "Update MM Timing B timeout" // (See earlier comment about MM Timing A timeout.) writeReg16Bit(MM_CONFIG__TIMEOUT_MACROP_B, encodeTimeout( timeoutMicrosecondsToMclks(1, macro_period_us))); - + // "Update Range Timing B timeout" writeReg16Bit(RANGE_CONFIG__TIMEOUT_MACROP_B, encodeTimeout( timeoutMicrosecondsToMclks(range_config_timeout_us, macro_period_us))); - printf("it is true\r\n"); // VL53L1_calc_timeout_register_values() end - + return true; } - + // Get the measurement timing budget in microseconds // based on VL53L1_SetMeasurementTimingBudgetMicroSeconds() uint32_t VL53L1X::getMeasurementTimingBudget() { // assumes PresetMode is LOWPOWER_AUTONOMOUS and these sequence steps are // enabled: VHV, PHASECAL, DSS1, RANGE - + // VL53L1_get_timeouts_us() begin - + // "Update Macro Period for Range A VCSEL Period" uint32_t macro_period_us = calcMacroPeriod(readReg(RANGE_CONFIG__VCSEL_PERIOD_A)); - + // "Get Range Timing A timeout" - + uint32_t range_config_timeout_us = timeoutMclksToMicroseconds(decodeTimeout( readReg16Bit(RANGE_CONFIG__TIMEOUT_MACROP_A)), macro_period_us); - + // VL53L1_get_timeouts_us() end - + return 2 * range_config_timeout_us + TimingGuard; } - + // Start continuous ranging measurements, with the given inter-measurement // period in milliseconds determining how often the sensor takes a measurement. void VL53L1X::startContinuous(uint32_t period_ms) @@ -417,17 +422,17 @@ writeReg(SYSTEM__INTERRUPT_CLEAR, 0x01); // sys_interrupt_clear_range writeReg(SYSTEM__MODE_START, 0x40); // mode_range__timed } - + // Stop continuous measurements // based on VL53L1_stop_range() void VL53L1X::stopContinuous() { writeReg(SYSTEM__MODE_START, 0x80); // mode_range__abort - + // VL53L1_low_power_auto_data_stop_range() begin - + calibrated = false; - + // "restore vhv configs" if (saved_vhv_init != 0) { @@ -437,21 +442,24 @@ { writeReg(VHV_CONFIG__TIMEOUT_MACROP_LOOP_BOUND, saved_vhv_timeout); } - + // "remove phasecal override" writeReg(PHASECAL_CONFIG__OVERRIDE, 0x00); - + // VL53L1_low_power_auto_data_stop_range() end } - + // Returns a range reading in millimeters when continuous mode is active -// (readRangeSingleMillimeters() also calls this function after starting a +// (readRangeSingleMillimetersx () also calls this function after starting a // single-shot range measurement) uint16_t VL53L1X::read(bool blocking) { if (blocking) { - startTimeout(); + // startTimeout(); + + /* dataReady returns 0. Loop is never entered. */ + /* while (dataReady()) { if (checkTimeoutExpired()) @@ -463,26 +471,26 @@ ranging_data.ambient_count_rate_MCPS = 0; return ranging_data.range_mm; } - } + }*/ } - + readResults(); - + if (!calibrated) { setupManualCalibration(); calibrated = true; } - + updateDSS(); - + getRangingData(); - + writeReg(SYSTEM__INTERRUPT_CLEAR, 0x01); // sys_interrupt_clear_range - + return ranging_data.range_mm; } - + // convert a RangeStatus to a readable string // Note that on an AVR, these strings are stored in RAM (dynamic memory), which // makes working with them easier but uses up 200+ bytes of RAM (many AVR-based @@ -494,45 +502,45 @@ { case RangeValid: return "range valid"; - + case SigmaFail: return "sigma fail"; - + case SignalFail: return "signal fail"; - + case RangeValidMinRangeClipped: return "range valid, min range clipped"; - + case OutOfBoundsFail: return "out of bounds fail"; - + case HardwareFail: return "hardware fail"; - + case RangeValidNoWrapCheckFail: return "range valid, no wrap check fail"; - + case WrapTargetFail: return "wrap target fail"; - + case XtalkSignalFail: return "xtalk signal fail"; - + case SynchronizationInt: return "synchronization int"; - + case MinRangeFail: return "min range fail"; - + case None: return "no update"; - + default: return "unknown status"; } } - + // Did a timeout occur in one of the read functions since the last call to // timeoutOccurred()? bool VL53L1X::timeoutOccurred() @@ -541,9 +549,9 @@ did_timeout = false; return tmp; } - + // Private Methods ///////////////////////////////////////////////////////////// - + // "Setup ranges after the first one in low power auto mode by turning off // FW calibration steps and programming static values" // based on VL53L1_low_power_auto_setup_manual_calibration() @@ -552,122 +560,127 @@ // "save original vhv configs" saved_vhv_init = readReg(VHV_CONFIG__INIT); saved_vhv_timeout = readReg(VHV_CONFIG__TIMEOUT_MACROP_LOOP_BOUND); - + // "disable VHV init" writeReg(VHV_CONFIG__INIT, saved_vhv_init & 0x7F); - + // "set loop bound to tuning param" writeReg(VHV_CONFIG__TIMEOUT_MACROP_LOOP_BOUND, (saved_vhv_timeout & 0x03) + (3 << 2)); // tuning parm default (LOWPOWERAUTO_VHV_LOOP_BOUND_DEFAULT) - + // "override phasecal" writeReg(PHASECAL_CONFIG__OVERRIDE, 0x01); writeReg(CAL_CONFIG__VCSEL_START, readReg(PHASECAL_RESULT__VCSEL_START)); } - + // read measurement results into buffer void VL53L1X::readResults() { -// char infoToWrite[2]; - char infoToRead[17]; + char infoToWrite[2]; + char infoToRead[18]; //_i2c.beginTransmission(address); - _i2c.write((RESULT__RANGE_STATUS >> 8) & 0xFF); // reg high byte - _i2c.write( RESULT__RANGE_STATUS & 0xFF); // reg low byte + //_i2c.write(address); + //_i2c.write((RESULT__RANGE_STATUS >> 8) & 0xFF); // reg high byte + //_i2c.write( RESULT__RANGE_STATUS & 0xFF); // reg low byte // last_status = _i2c.endTransmission(); - + infoToWrite[0] = ((RESULT__RANGE_STATUS >> 8) & 0xFF); + infoToWrite[1] = ( RESULT__RANGE_STATUS & 0xFF); + _i2c.write(address, infoToWrite, 2, 1); + // _i2c.requestFrom(address, (uint8_t)17); _i2c.read(address, infoToRead, 17, 0); - + + wait(.02); results.range_status = infoToRead[0]; - + // infoToRead[1]; // report_status: not used - + results.stream_count = infoToRead[2]; - + results.dss_actual_effective_spads_sd0 = (uint16_t)infoToRead[3] << 8; // high byte results.dss_actual_effective_spads_sd0 |= infoToRead[4]; // low byte - + // infoToRead[5]; // peak_signal_count_rate_mcps_sd0: not used // infoToRead[6]; - + results.ambient_count_rate_mcps_sd0 = (uint16_t)infoToRead[7] << 8; // high byte results.ambient_count_rate_mcps_sd0 |= infoToRead[8]; // low byte - + // infoToRead[9]; // sigma_sd0: not used // infoToRead[10]; - + // infoToRead[11]; // phase_sd0: not used // infoToRead[12]; - + results.final_crosstalk_corrected_range_mm_sd0 = (uint16_t)infoToRead[13] << 8; // high byte results.final_crosstalk_corrected_range_mm_sd0 |= infoToRead[14]; // low byte - + results.peak_signal_count_rate_crosstalk_corrected_mcps_sd0 = (uint16_t)infoToRead[15] << 8; // high byte results.peak_signal_count_rate_crosstalk_corrected_mcps_sd0 |= infoToRead[16]; // low byte } - + // perform Dynamic SPAD Selection calculation/update // based on VL53L1_low_power_auto_update_DSS() void VL53L1X::updateDSS() { uint16_t spadCount = results.dss_actual_effective_spads_sd0; - + if (spadCount != 0) { // "Calc total rate per spad" - + uint32_t totalRatePerSpad = (uint32_t)results.peak_signal_count_rate_crosstalk_corrected_mcps_sd0 + results.ambient_count_rate_mcps_sd0; - + // "clip to 16 bits" if (totalRatePerSpad > 0xFFFF) { totalRatePerSpad = 0xFFFF; } - + // "shift up to take advantage of 32 bits" totalRatePerSpad <<= 16; - + totalRatePerSpad /= spadCount; - + if (totalRatePerSpad != 0) { // "get the target rate and shift up by 16" uint32_t requiredSpads = ((uint32_t)TargetRate << 16) / totalRatePerSpad; - + // "clip to 16 bit" if (requiredSpads > 0xFFFF) { requiredSpads = 0xFFFF; } - + // "override DSS config" writeReg16Bit(DSS_CONFIG__MANUAL_EFFECTIVE_SPADS_SELECT, requiredSpads); // DSS_CONFIG__ROI_MODE_CONTROL should already be set to REQUESTED_EFFFECTIVE_SPADS - + return; } } - + // If we reached this point, it means something above would have resulted in a // divide by zero. // "We want to gracefully set a spad target, not just exit with an error" - + // "set target to mid point" writeReg16Bit(DSS_CONFIG__MANUAL_EFFECTIVE_SPADS_SELECT, 0x8000); } - + // get range, status, rates from results buffer // based on VL53L1_GetRangingMeasurementData() void VL53L1X::getRangingData() { // VL53L1_copy_sys_and_core_results_to_range_results() begin - + uint16_t range = results.final_crosstalk_corrected_range_mm_sd0; - + // "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). ranging_data.range_mm = ((uint32_t)range * 2011 + 0x0400) / 0x0800; - + wait(.02); // VL53L1_copy_sys_and_core_results_to_range_results() end - + // set range_status in ranging_data based on value of RESULT__RANGE_STATUS register // mostly based on ConvertStatusLite() switch(results.range_status) @@ -679,40 +692,40 @@ // from SetSimpleData() ranging_data.range_status = HardwareFail; break; - + case 13: // USERROICLIP // from SetSimpleData() ranging_data.range_status = MinRangeFail; break; - + case 18: // GPHSTREAMCOUNT0READY ranging_data.range_status = SynchronizationInt; break; - + case 5: // RANGEPHASECHECK ranging_data.range_status = OutOfBoundsFail; break; - + case 4: // MSRCNOTARGET ranging_data.range_status = SignalFail; break; - + case 6: // SIGMATHRESHOLDCHECK ranging_data.range_status = SignalFail; break; - + case 7: // PHASECONSISTENCY ranging_data.range_status = WrapTargetFail; break; - + case 12: // RANGEIGNORETHRESHOLD ranging_data.range_status = XtalkSignalFail; break; - + case 8: // MINCLIP ranging_data.range_status = RangeValidMinRangeClipped; break; - + case 9: // RANGECOMPLETE // from VL53L1_copy_sys_and_core_results_to_range_results() if (results.stream_count == 0) @@ -724,49 +737,49 @@ ranging_data.range_status = RangeValid; } break; - + default: ranging_data.range_status = None; } - + // from SetSimpleData() ranging_data.peak_signal_count_rate_MCPS = countRateFixedToFloat(results.peak_signal_count_rate_crosstalk_corrected_mcps_sd0); ranging_data.ambient_count_rate_MCPS = countRateFixedToFloat(results.ambient_count_rate_mcps_sd0); } - + // Decode sequence step timeout in MCLKs from register value // based on VL53L1_decode_timeout() uint32_t VL53L1X::decodeTimeout(uint16_t reg_val) { return ((uint32_t)(reg_val & 0xFF) << (reg_val >> 8)) + 1; } - + // Encode sequence step timeout register value from timeout in MCLKs // based on VL53L1_encode_timeout() uint16_t VL53L1X::encodeTimeout(uint32_t timeout_mclks) { // encoded format: "(LSByte * 2^MSByte) + 1" - + uint32_t ls_byte = 0; uint16_t ms_byte = 0; - + if (timeout_mclks > 0) { ls_byte = timeout_mclks - 1; - + while ((ls_byte & 0xFFFFFF00) > 0) { ls_byte >>= 1; ms_byte++; } - + return (ms_byte << 8) | (ls_byte & 0xFF); } else { return 0; } } - + // Convert sequence step timeout from macro periods to microseconds with given // macro period in microseconds (12.12 format) // based on VL53L1_calc_timeout_us() @@ -774,7 +787,7 @@ { return ((uint64_t)timeout_mclks * macro_period_us + 0x800) >> 12; } - + // Convert sequence step timeout from microseconds to macro periods with given // macro period in microseconds (12.12 format) // based on VL53L1_calc_timeout_mclks() @@ -782,7 +795,7 @@ { return (((uint32_t)timeout_us << 12) + (macro_period_us >> 1)) / macro_period_us; } - + // Calculate macro period in microseconds (12.12 format) with given VCSEL period // assumes fast_osc_frequency has been read and stored // based on VL53L1_calc_macro_period_us() @@ -791,15 +804,68 @@ // from VL53L1_calc_pll_period_us() // fast osc frequency in 4.12 format; PLL period in 0.24 format uint32_t pll_period_us = ((uint32_t)0x01 << 30) / fast_osc_frequency; - + // from VL53L1_decode_vcsel_period() uint8_t vcsel_period_pclks = (vcsel_period + 1) << 1; - + // VL53L1_MACRO_PERIOD_VCSEL_PERIODS = 2304 uint32_t macro_period_us = (uint32_t)2304 * pll_period_us; macro_period_us >>= 6; macro_period_us *= vcsel_period_pclks; macro_period_us >>= 6; - + return macro_period_us; +} + + + + + + + + + + +bool VL53L1X::initReading(int addr, int timing_budget) +{ + turnOn(); + wait_ms(100); + setTimeout(500); + if (!init()) { + return false; + } + // setDistanceMode(VL53L1X::Short);//Short Medium Long + setAddress(addr);//change I2C address for next sensor + setMeasurementTimingBudget(timing_budget);//min 20ms for Short, 33ms for Medium and Long + wait_ms(100); + + return true; +} +//************************************* + +//*********GPIO*********** +void VL53L1X::turnOff(void) +{ + //turn pin LOW + _shutDown = false; +} +void VL53L1X::resetPin(void) +{ + //reset pin and set it to LOW + _shutDown = false; + wait(.05); + _shutDown = true; + wait(.05); + _shutDown = false; + wait(.05); +/* turnOff(); + wait_ms(10); + turnOn(); + wait_ms(10); + turnOff();*/ +} +void VL53L1X::turnOn(void) +{ + //turn pin HIGH + _shutDown = true; } \ No newline at end of file