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andycarle/lsm9ds1.js Secret

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Draft TC53 IO Driver for the LSM9DS1 IMU
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lsm9ds1.js
/*
* Copyright (c) 2019-2020 Moddable Tech, Inc.
*
* This file is part of the Moddable SDK Runtime.
*
* The Moddable SDK Runtime is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The Moddable SDK Runtime is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the Moddable SDK Runtime. If not, see <http://www.gnu.org/licenses/>.
*
*/
/*
LSM9DS1 IMU.
Currently configured only for polling — no interrupts.
https://www.sparkfun.com/products/13284
Datasheet: https://cdn.sparkfun.com/assets/learn_tutorials/3/7/3/LSM9DS1_Datasheet.pdf
*/
import SMBus from "smbus";
const Register = Object.freeze({
//AccelerometerGyro
WHO_AM_I: 0x0F,
CTRL_REG1_G: 0x10,
CTRL_REG2_G: 0x11,
CTRL_REG3_G: 0x12,
ORIENT_CFG_G: 0x13,
OUT_TEMP_L: 0x15,
OUT_TEMP_H: 0x16,
STATUS_REG: 0x17,
OUT_X_L_G: 0x18,
OUT_X_H_G: 0x19,
OUT_Y_L_G: 0x1A,
OUT_Y_H_G: 0x1B,
OUT_Z_L_G: 0x1C,
OUT_Z_H_G: 0x1D,
CTRL_REG4: 0x1E,
CTRL_REG5_XL: 0x1F,
CTRL_REG6_XL: 0x20,
CTRL_REG7_XL: 0x21,
CTRL_REG8: 0x22,
CTRL_REG9: 0x23,
CTRL_REG10: 0x24,
OUT_X_XL: 0x28,
OUT_Y_XL: 0x2A,
OUT_Z_XL: 0x2C,
//Magnetometer
OFFSET_X_REG_L_M: 0x05,
OFFSET_X_REG_H_M: 0x06,
OFFSET_Y_REG_L_M: 0x07,
OFFSET_Y_REG_H_M: 0x08,
OFFSET_Z_REG_L_M: 0x09,
OFFSET_Z_REG_H_M: 0x0A,
WHO_AM_I_M: 0x0F,
CTRL_REG1_M: 0x20,
CTRL_REG2_M: 0x21,
CTRL_REG3_M: 0x22,
CTRL_REG4_M: 0x23,
CTRL_REG5_M: 0x24,
STATUS_REG_M: 0x27,
OUT_X_L_M: 0x28,
OUT_X_H_M: 0x29,
OUT_Y_L_M: 0x2A,
OUT_Y_H_M: 0x2B,
OUT_Z_L_M: 0x2C,
OUT_Z_H_M: 0x2D,
INT_CFG_M: 0x30,
INT_SRC_M: 0x31,
INT_THS_L: 0x32,
INT_THS_H: 0x33
});
const CTRL_REG1_G = Object.freeze({
ODR_POWER_DOWN: 0b00000000,
ODR_14_9: 0b00100000,
ODR_59_5: 0b01000000,
ODR_119: 0b01100000,
ODR_238: 0b10000000,
ODR_476: 0b10100000,
ODR_952: 0b11000000,
FS_245DPS: 0b00000000,
FS_500DPS: 0b00001000,
FS_2000DPS: 0b00011000,
BW_00: 0b00000000,
BW_01: 0b00000001,
BW_10: 0b00000010,
BW_11: 0b00000011
});
const CTRL_REG2_G = Object.freeze({
OUT_SEL_00: 0b00000000,
OUT_SEL_01: 0b00000001,
OUT_SEL_10: 0b00000010,
OUT_SEL_11: 0b00000011,
});
const CTRL_REG3_G = Object.freeze({
LP_mode: 0b10000000,
HP_EN: 0b01000000,
HPCF_0000: 0b00000000,
HPCF_0001: 0b00000001,
HPCF_0010: 0b00000010,
HPCF_0011: 0b00000011,
HPCF_0100: 0b00000100,
HPCF_0101: 0b00000101,
HPCF_0110: 0b00000110,
HPCF_0111: 0b00000111,
HPCF_1000: 0b00001000,
HPCF_1001: 0b00001001,
});
const ORIENT_CFG_G = Object.freeze({
SignX_G: 0b00100000,
SignY_G: 0b00010000,
SignZ_G: 0b00001000,
});
const CTRL_REG4 = Object.freeze({
Zen_G: 0b00100000,
Yen_G: 0b00010000,
Xen_G: 0b00001000,
LIR_XL1: 0b00000010,
FOURD_XL1: 0b00000001
});
const CTRL_REG5_XL = Object.freeze({
DEC_NO_DECIMATION: 0b00000000,
DEC_TWO_SAMPLES: 0b01000000,
DEC_FOUR_SAMPLES: 0b10000000,
DEC_EIGHT_SAMPLES: 0b11000000,
Zen_XL: 0b00100000,
Yen_XL: 0b00010000,
Xen_XL: 0b00001000
});
const CTRL_REG6_XL = Object.freeze({
ODR_POWER_DOWN: 0b00000000,
ODR_10: 0b00100000,
ODR_50: 0b01000000,
ODR_119: 0b01100000,
ODR_238: 0b10000000,
ODR_476: 0b10100000,
ODR_952: 0b11000000,
FS_2G: 0b00000000,
FS_16G: 0b00001000,
FS_4G: 0b00010000,
FS_8G: 0b00011000,
BW_SCAL_ODR: 0b00000100,
BW_408: 0b00000000,
BW_211: 0b00000001,
BW_105: 0b00000010,
BW_50: 0b00000011
});
const CTRL_REG7_XL = Object.freeze({
HR: 0b10000000,
DCF_50: 0b00000000,
DCF_100: 0b00100000,
DCF_9: 0b01000000,
DCF_400: 0b01100000,
FDS: 0b00000100,
HPIS1: 0b00000001
});
const CTRL_REG8 = Object.freeze({
BOOT: 0b10000000,
BDU: 0b01000000,
H_LACTIVE: 0b00100000,
PP_OD: 0b00010000,
SIM: 0b00001000,
IF_ADD_INC: 0b00000100,
BLE_BIG_ENDIAN: 0b00000010,
BLE_LITTLE_ENDIAN: 0b00000000,
SW_RESET: 0b00000001
});
const CTRL_REG9 = Object.freeze({
SLEEP_G: 0b01000000,
FIFO_TEMP_EN: 0b00010000,
DRDY_mask_bit: 0b00001000,
I2C_DISABLE: 0b00000100,
FIFO_EN: 0b00000010,
STOP_ON_FTH: 0b00000001
});
const CTRL_REG10 = Object.freeze({
ST_G: 0b00000100,
ST_XL: 0b00000001
});
const StatusReg = Object.freeze({
IG_XL: 0b01000000,
IG_G: 0b00100000,
INACT: 0b00010000,
BOOT_STATUS: 0b00001000,
TDA: 0b00000100,
GDA: 0b00000010,
XLDA: 0b00000001
});
const GRES_VALUES = Object.freeze({ //Per Datasheet Table 3, G_So
FS_245DPS: 0.00875,
FS_500DPS: 0.0175,
FS_2000DPS: 0.07
});
const XLRES_VALUES = Object.freeze({ //Per Datasheet Table 3, LA_So
FS_2G: 0.000061,
FS_4G: 0.000122,
FS_8G: 0.000244,
FS_16G: 0.000732
});
const CTRL_REG1_M = Object.freeze({
TEMP_COMP: 0b10000000,
OM_LOWPOWER: 0b00000000,
OM_MEDIUM: 0b00100000,
OM_HIGH: 0b01000000,
OM_ULTRA: 0b01100000,
DO_0_625: 0b00000000,
DO_1_25: 0b00000100,
DO_2_5: 0b00001000,
DO_5: 0b00011000,
DO_10: 0b00010000,
DO_20: 0b00010100,
DO_40: 0b00011000,
DO_80: 0b00011100,
FAST_ODR: 0b00000010,
ST: 0b00000001
});
const CTRL_REG2_M = Object.freeze({
FS_4GAUSS: 0b00000000,
FS_8GAUSS: 0b00100000,
FS_12GAUSS: 0b01000000,
FS_16GAUSS: 0b01100000,
REBOOT: 0b00001000,
SOFT_RST: 0b00000100
});
const CTRL_REG3_M = Object.freeze({
I2C_DISABLE: 0b10000000,
LP: 0b00100000,
SIM: 0b00000100,
MD_CONTINUOUS: 0b00000000,
MD_SINGLE: 0b00000001,
MD_POWER_DOWN1: 0b00000010,
MD_POWER_DOWN2: 0b00000011
});
const CTRL_REG4_M = Object.freeze({
OM_LOWPOWER: 0b00000000,
OM_MEDIUM: 0b00000100,
OM_HIGH: 0b00001000,
OM_ULTRA: 0b00001100,
BLE_LITTLE_ENDIAN: 0b00000000,
BLE_BIG_ENDIAN: 0b00000010
});
const CTRL_REG5_M = Object.freeze({
FAST_READ: 0b10000000,
BDU: 0b01000000
});
const Control_Register_Values = Object.freeze({
CTRL_REG1_G,
CTRL_REG2_G,
CTRL_REG3_G,
CTRL_REG4,
CTRL_REG5_XL,
CTRL_REG6_XL,
CTRL_REG7_XL,
CTRL_REG8,
CTRL_REG9,
CTRL_REG10,
CTRL_REG1_M,
CTRL_REG2_M,
CTRL_REG3_M,
CTRL_REG4_M,
CTRL_REG5_M
});
const MRES_VALUES = Object.freeze({ //Per Datasheet Table 3, M_GN
FS_4GAUSS: 0.00014,
FS_8GAUSS: 0.00029,
FS_12GAUSS: 0.00043,
FS_16GAUSS: 0.00058
});
class AccelerometerGyro extends SMBus {
constructor(dictionary){
super({ ...dictionary, address: 0x6B, hz: 600000 });
this.readingsBuffer = new ArrayBuffer(6);
this.view = new DataView(this.readingsBuffer);
this.settings = {
ODR_G: CTRL_REG1_G.ODR_952, FS_G: CTRL_REG1_G.FS_245DPS, BW_G: CTRL_REG1_G.BW_00, //Control Register 1 (Gyro)
OUT_SEL: CTRL_REG2_G.OUT_SEL_00, //Control Register 2 (Gyro)
LP_mode: false, HP_EN: false, HPCF_G: CTRL_REG3_G.HPCF_0000, //Control Register 3 (Gyro)
SignX_G: false, SignY_G: false, SignZ_G: false, Orient: 0, //Orientation Configuration Register (Gyro)
Zen_G: true, Yen_G: true, Xen_G: true, LIR_XL1: true, FOURD_XL1: false, //Control Register 4
DEC: CTRL_REG5_XL.DEC_NO_DECIMATION, Zen_XL: true, Yen_XL: true, Xen_XL: true, //Control Register 5 (Accelerometer)
ODR_XL: CTRL_REG6_XL.ODR_952, FS_XL: CTRL_REG6_XL.FS_2G, BW_SCAL_ODR: false, BW_XL: CTRL_REG6_XL.BW_408, //Control Register 6 (Accelerometer)
HR: false, DCF: CTRL_REG7_XL.DCF_50, FDS: false, HPIS1: false, //Control Register 7 (Accelerometer)
BOOT: false, BDU: false, H_LACTIVE: false, PP_OD: false, SIM: false, IF_ADD_INC: true, BLE: CTRL_REG8.BLE_LITTLE_ENDIAN, SW_RESET: false, //Control Register 8
SLEEP_G: false, FIFO_TEMP_EN: false, DRDY_mask_bit: false, I2C_DISABLE: false, FIFO_EN: false, STOP_ON_FTH: false, //Control Register 9
ST_G: false, ST_XL: 0, //Control Register 10
blocking: true
}
this.checkIdentification();
this.configure({initializeAll: true});
this.gxBias = this.gyBias = this.gzBias = 0;
this.xlxBias = this.xlyBias = this.xlzBias = 0;
this.calibrate();
this.operation = "gyro";
}
checkIdentification(){
let id = super.readByte(Register.WHO_AM_I);
if (id != 0x68) throw("unexpected device ID for LSM9DS1 accelerometer and gyro");
}
configure(dictionary){
if ("operation" in dictionary){
this.operation = dictionary.operation;
delete dictionary.operation;
}
if (Object.keys(dictionary).length == 0) return;
Object.assign(this.settings, dictionary);
let settings = this.settings;
if (settings.I2C_DISABLE){
settings.I2C_DISABLE = false; //Don't accidentally disable I2C when I2C is the only signal pathway we have.
throw("Don't disable I2C on the LSM9DS1 in the I2C driver.");
}
let value = settings.ODR_G | settings.FS_G | settings.BW_G;
super.writeByte(Register.CTRL_REG1_G, value);
value = settings.OUT_SEL;
super.writeByte(Register.CTRL_REG2_G, value);
value = settings.HPCF_G | (settings.LP_mode ? CTRL_REG3_G.LP_mode : 0) | (settings.HP_EN ? CTRL_REG3_G.HP_EN : 0);
super.writeByte(Register.CTRL_REG3_G, value);
value = (settings.SignX_G ? ORIENT_CFG_G.SignX_G : 0) | (settings.SignY_G ? ORIENT_CFG_G.SignY_G : 0) | (settings.SignZ_G ? ORIENT_CFG_G.SignZ_G : 0) | settings.Orient;
super.writeByte(Register.ORIENT_CFG_G, value);
value = (settings.Zen_G ? CTRL_REG4.Zen_G : 0) | (settings.Yen_G ? CTRL_REG4.Yen_G : 0) | (settings.Xen_G ? CTRL_REG4.Xen_G : 0) | (settings.LIR_XL1 ? CTRL_REG4.LIR_XL1 : 0) | (settings.FOURD_XL1 ? CTRL_REG4.FOURD_XL1 : 0);
super.writeByte(Register.CTRL_REG4, value);
value = settings.DEC | (settings.Zen_XL ? CTRL_REG5_XL.Zen_XL : 0) | (settings.Yen_XL ? CTRL_REG5_XL.Yen_XL : 0) | (settings.Xen_XL ? CTRL_REG5_XL.Xen_XL : 0);
super.writeByte(Register.CTRL_REG5_XL, value);
value = settings.ODR_XL | settings.FS_XL | (settings.BW_SCAL_ODR ? CTRL_REG6_XL.BW_SCAL_ODR : 0) | settings.BW_XL;
super.writeByte(Register.CTRL_REG6_XL, value);
value = (settings.HR ? CTRL_REG7_XL.HR : 0) | settings.DCF | (settings.FDS ? CTRL_REG7_XL.FDS : 0) | (settings.HPIS1 ? CTRL_REG7_XL.HPIS1 : 0);
super.writeByte(Register.CTRL_REG7_XL, value);
value = (settings.BOOT ? CTRL_REG8.BOOT : 0) | (settings.BDU ? CTRL_REG8.BDU : 0) | (settings.H_LACTIVE ? CTRL_REG8.H_LACTIVE : 0) |
(settings.PP_OD ? CTRL_REG8.PP_OD : 0) | (settings.SIM ? CTRL_REG8.SIM : 0) | (settings.IF_ADD_INC ? CTRL_REG8.IF_ADD_INC : 0) |
(settings.SW_RESET ? CTRL_REG8.SW_RESET : 0) | settings.BLE;
super.writeByte(Register.CTRL_REG8, value);
value = (settings.SLEEP_G ? CTRL_REG9.SLEEP_G : 0) | (settings.FIFO_TEMP_EN ? CTRL_REG9.FIFO_TEMP_EN : 0) | (settings.DRDY_mask_bit ? CTRL_REG9.DRDY_mask_bit : 0) |
(settings.I2C_DISABLE ? CTRL_REG9.I2C_DISABLE : 0) | (settings.FIFO_EN ? CTRL_REG9.FIFO_EN : 0) | (settings.STOP_ON_FTH ? CTRL_REG9.STOP_ON_FTH : 0);
super.writeByte(Register.CTRL_REG9, value);
value = (settings.ST_G ? CTRL_REG10.ST_G : 0) | (settings.ST_XL ? CTRL_REG10.ST_XL : 0);
super.writeByte(Register.CTRL_REG10, value);
this.configureGRes();
this.configureXLRes();
}
configureGRes(){
switch (this.settings.FS_G){
case CTRL_REG1_G.FS_500DPS:
this.gres = GRES_VALUES.FS_500DPS;
break;
case CTRL_REG1_G.FS_2000DPS:
this.gres = GRES_VALUES.FS_2000DPS;
break;
case CTRL_REG1_G.FS_245DPS:
default:
this.gres = GRES_VALUES.FS_245DPS;
break;
}
}
configureXLRes(){
switch (this.settings.FS_XL){
case CTRL_REG6_XL.FS_16G:
this.xlres = XLRES_VALUES.FS_16G;
break;
case CTRL_REG6_XL.FS_8G:
this.xlres = XLRES_VALUES.FS_8G;
break;
case CTRL_REG6_XL.FS_2G:
this.xlres = XLRES_VALUES.FS_2G;
break;
case CTRL_REG6_XL.FS_4G:
default:
this.xlres = XLRES_VALUES.FS_4G;
break;
}
}
gyroDataAvailable(){
let status = super.readByte(Register.STATUS_REG);
return (status & StatusReg.GDA) > 0;
}
accelDataAvailable(){
let status = super.readByte(Register.STATUS_REG);
return (status & StatusReg.XLDA) > 0;
}
calibrate(){
let block = this.settings.blocking;
this.settings.blocking = true;
const iterations = 20;
let x = 0;
let y = 0;
let z = 0;
for (let i = 0; i < iterations; i++){
let values = this.sampleGyro();
x += values.x;
y += values.y;
z += values.z;
}
this.gxBias = x / iterations;
this.gyBias = y / iterations;
this.gzBias = z / iterations;
x = 0;
y = 0;
z = 0;
for (let i = 0; i < iterations; i++){
let values = this.sampleAccel();
x += values.x;
y += values.y;
z += values.z;
}
this.xlxBias = x / iterations;
this.xlyBias = y / iterations;
this.xlzBias = z / iterations;
}
sampleGyro(){
if (this.settings.blocking){
let ready = false;
while (!ready) ready = this.gyroDataAvailable();
}
super.readBlock(Register.OUT_X_L_G, this.readingsBuffer);
return {
x: this.view.getInt16(0, true) * this.gres - this.gxBias,
y: this.view.getInt16(2, true) * this.gres - this.gyBias,
z: this.view.getInt16(4, true) * this.gres - this.gzBias
}
}
sampleAccel(){
if (this.settings.blocking){
let ready = false;
while (!ready) ready = this.accelDataAvailable();
}
super.readBlock(Register.OUT_X_XL, this.readingsBuffer);
return {
x: this.view.getInt16(0, true) * this.xlres - this.xlxBias,
y: this.view.getInt16(2, true) * this.xlres - this.xlyBias,
z: this.view.getInt16(4, true) * this.xlres - this.xlzBias
}
}
sample(){
if (this.operation == "gyro")
return this.sampleGyro();
else
return this.sampleAccel();
}
}
Object.freeze(AccelerometerGyro.prototype);
class Magnetometer extends SMBus {
constructor(dictionary){
super({ ...dictionary, address: 0x1E, hz: 600000});
this.checkIdentification();
this.readingsBuffer = new ArrayBuffer(6);
this.view = new DataView(this.readingsBuffer);
this.settings = {
TEMP_COMP: false, OM_XY: CTRL_REG1_M.OM_ULTRA, DO: CTRL_REG1_M.DO_80, FAST_ODR: false, ST: false, //Control Register 1
FS: CTRL_REG2_M.FS_4GAUSS, REBOOT: false, SOFT_RST: false, //Control Register 2
I2C_DISABLE: false, LP: false, SIM: false, MD: CTRL_REG3_M.MD_CONTINUOUS, //Control Register 3
OM_Z: CTRL_REG4_M.OM_ULTRA, BLE: CTRL_REG4_M.BLE_LITTLE_ENDIAN, //Control Register 4
FAST_READ: false, BDU: false, //Control Register 5
blocking: true
};
this.configure({});
}
checkIdentification(){
let id = super.readByte(Register.WHO_AM_I_M);
if (id != 0x3D) throw("unexpected device ID for LSM9DS1 magnetometer");
}
configure(dictionary){
Object.assign(this.settings, dictionary);
let settings = this.settings;
if (settings.I2C_DISABLE){
settings.I2C_DISABLE = false; //Don't accidentally disable I2C when I2C is the only signal pathway we have.
throw("Don't disable I2C on the LSM9DS1 in the I2C driver.");
}
let value;
value = (settings.TEMP_COMP ? CTRL_REG1_M.TEMP_COMP : 0) | settings.OM_XY | settings.DO | (settings.FAST_ODR ? CTRL_REG1_M.FAST_ODR : 0) | (settings.ST ? CTRL_REG1_M.ST : 0);
super.writeByte(Register.CTRL_REG1_M, value);
value = settings.FS | (settings.REBOOT ? CTRL_REG2_M.REBOOT : 0) | (settings.SOFT_RST ? CTRL_REG2_M.SOFT_RST : 0);
super.writeByte(Register.CTRL_REG2_M, value);
value = settings.MD | (settings.I2C_DISABLE ? CTRL_REG3_M.I2C_DISABLE : 0) | (settings.LP ? CTRL_REG3_M.LP : 0) | (settings.SIM ? CTRL_REG3_M.SIM : 0);
super.writeByte(Register.CTRL_REG3_M, value);
value = settings.OM_Z | settings.BLE;
super.writeByte(Register.CTRL_REG4_M, value);
value = (settings.FAST_READ ? CTRL_REG5_M.FAST_READ : 0) | (settings.BDU ? CTRL_REG5_M.BDU : 0);
super.writeByte(Register.CTRL_REG5_M, value);
switch (settings.FS){
case CTRL_REG2_M.FS_4GAUSS:
this.mres = MRES_VALUES.FS_4GAUSS;
break;
case CTRL_REG2_M.FS_8GAUSS:
this.mres = MRES_VALUES.FS_8GAUSS;
break;
case CTRL_REG2_M.FS_12GAUSS:
this.mres = MRES_VALUES.FS_12GAUSS;
break;
case CTRL_REG2_M.FS_16GAUSS:
default:
this.mres = MRES_VALUES.FS_16GAUSS;
break;
}
}
dataAvailable(){
let status = super.readByte(Register.STATUS_REG_M);
return (status & 0b00000111);
}
sample(){
if (this.settings.blocking){
let ready = false;
while (!ready){
ready = this.dataAvailable();
}
}
let littleEndian = (this.settings.BLE == CTRL_REG4_M.BLE_LITTLE_ENDIAN);
const data = super.readBlock(Register.OUT_X_L_M, this.readingsBuffer);
return {
x: this.view.getInt16(0, littleEndian) * this.mres,
y: this.view.getInt16(2, littleEndian) * this.mres,
z: this.view.getInt16(4, littleEndian) * this.mres,
}
}
}
Object.freeze(Magnetometer.prototype);
class Sensor {
constructor(dictionary = {}){
this.magnetometer = new Magnetometer(dictionary);
this.accelGyro = new AccelerometerGyro(dictionary);
if (dictionary.operation){
this.operation = dictionary.operation;
}else {
this.operation = "gyro";
}
}
sample(){
switch (this.operation){
case "gyro":
return this.accelGyro.sampleGyro();
case "accelerometer":
return this.accelGyro.sampleAccel();
case "magnetometer":
return this.magnetometer.sample();
default:
throw(`Invalid operation for LSM9DS1. Should be one of "gyro", "accelerometer", or "magnetometer".\n`);
}
}
configure(dictionary = {}){
if (dictionary.operation){
this.operation = dictionary.operation;
if (this.operation == "gyro" || this.operation == "accelerometer") this.accelGyro.operation = this.operation;
delete dictionary.operation;
}
if (this.operation == "gyro" || this.operation == "accelerometer"){
this.accelGyro.configure(dictionary);
}else{
this.magnetometer.configure(dictionary);
}
}
close(){
this.accelGyro.close();
this.magnetometer.close();
}
}
Object.freeze(Sensor.prototype);
export {Sensor as default, Control_Register_Values};
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