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SparkFun INA2XX Arduino Library
v1.0.0-3-gc9007d6
Arduino Library for the SparkFun Qwiic Power Monitor (INA228 / INA237)
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SparkFun INA2XX Arduino Library
v1.0.0-3-gc9007d6
Arduino Library for the SparkFun Qwiic Power Monitor (INA228 / INA237)
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Arduino I2C implementation for the INA237 power monitor. More...
#include <SparkFun_INA2XX.h>
Public Member Functions | |
| SfeINA237ArdI2C () | |
| bool | begin (uint8_t address=kI2CAddress, TwoWire &wirePort=Wire) |
| Initializes the INA237 with I2C communication. More... | |
| bool | isConnected (void) |
| Checks if the INA237 is connected and responding. More... | |
 Public Member Functions inherited from sfDevINA237 | |
| sfDevINA237 () | |
| sfTkError_t | calibrate (float shuntResOhms, float maxCurrentA) |
| Calibrate the device for current and power measurements. More... | |
| sfTkError_t | getShuntVoltage_mV (float &milliVolts) |
| Read the shunt voltage in millivolts (16-bit VSHUNT). More... | |
| sfTkError_t | getBusVoltage_V (float &volts) |
| Read the bus voltage in Volts (16-bit VBUS, 3.125 mV/LSB). More... | |
| sfTkError_t | getCurrent_A (float &s) |
| Read the calculated current in Amps (16-bit CURRENT, scaled by CURRENT_LSB). More... | |
| sfTkError_t | getPower_W (float &watts) |
| Read the calculated power in Watts (24-bit POWER, scaled by 0.2 * CURRENT_LSB). More... | |
| sfTkError_t | getDieTemp_C (float &celsius) |
| Read the die temperature in degrees Celsius. More... | |
| sfTkError_t | getShuntVoltageRaw (int16_t &value) |
| Read the raw 16-bit shunt voltage value. More... | |
| sfTkError_t | getBusVoltageRaw (uint16_t &value) |
| Read the raw 16-bit bus voltage value. More... | |
| sfTkError_t | getCurrentRaw (int16_t &value) |
| Read the raw 16-bit current value. More... | |
| sfTkError_t | getPowerRaw (uint32_t &value) |
| Read the raw 24-bit power value. More... | |
| Public Member Functions inherited from sfDevINA2XX | |
| sfDevINA2XX () | |
| sfTkError_t | begin (sfTkIBus *theBus=nullptr) |
| Initialize the device driver with the given bus. More... | |
| void | setCommunicationBus (sfTkIBus *theBus) |
| Set the communication bus pointer. More... | |
| sfTkError_t | getManufacturerID (uint16_t &id) |
| Read the Manufacturer ID register (0x3E). More... | |
| sfTkError_t | getDeviceID (uint16_t &id) |
| Read the Device ID register (0x3F). More... | |
| sfTkError_t | reset (void) |
| Perform a full system reset via the RST bit in CONFIG. More... | |
| sfTkError_t | resetAccumulators (void) |
| Reset the energy and charge accumulators (INA228 RSTACC bit). More... | |
| sfTkError_t | setADCRange (bool reducedRange) |
| Set the ADC full-scale shunt range. More... | |
| sfTkError_t | getADCRange (bool &reducedRange) |
| Get the current ADC range setting. More... | |
| sfTkError_t | setConversionDelay (uint8_t delay2ms) |
| Set the initial conversion delay in 2ms steps. More... | |
| sfTkError_t | getConversionDelay (uint8_t &delay2ms) |
| Get the current conversion delay setting. More... | |
| sfTkError_t | enableTempCompensation (bool enable) |
| Enable or disable shunt temperature compensation. More... | |
| sfTkError_t | getTempCompensation (bool &enabled) |
| Get the temperature compensation enable state. More... | |
| sfTkError_t | setADCMode (sfe_ina2xx_mode_t mode) |
| Set the ADC operating mode. More... | |
| sfTkError_t | getADCMode (sfe_ina2xx_mode_t &mode) |
| Get the current ADC operating mode. More... | |
| sfTkError_t | setBusVoltageConvTime (sfe_ina2xx_conv_time_t time) |
| Set the bus voltage conversion time. More... | |
| sfTkError_t | getBusVoltageConvTime (sfe_ina2xx_conv_time_t &time) |
| Get the bus voltage conversion time. More... | |
| sfTkError_t | setShuntVoltageConvTime (sfe_ina2xx_conv_time_t time) |
| Set the shunt voltage conversion time. More... | |
| sfTkError_t | getShuntVoltageConvTime (sfe_ina2xx_conv_time_t &time) |
| Get the shunt voltage conversion time. More... | |
| sfTkError_t | setTempConvTime (sfe_ina2xx_conv_time_t time) |
| Set the temperature conversion time. More... | |
| sfTkError_t | getTempConvTime (sfe_ina2xx_conv_time_t &time) |
| Get the temperature conversion time. More... | |
| sfTkError_t | setAveragingCount (sfe_ina2xx_avg_count_t count) |
| Set the ADC averaging count. More... | |
| sfTkError_t | getAveragingCount (sfe_ina2xx_avg_count_t &count) |
| Get the current ADC averaging count. More... | |
| sfTkError_t | setShuntCal (uint16_t calValue) |
| Write a raw value to the SHUNT_CAL register. More... | |
| sfTkError_t | getShuntCal (uint16_t &calValue) |
| Read the current SHUNT_CAL register value. More... | |
| sfTkError_t | setShuntTempCoefficient (uint16_t ppmPerDegC) |
| Set the shunt temperature coefficient for temperature compensation. More... | |
| sfTkError_t | getShuntTempCoefficient (uint16_t &ppmPerDegC) |
| Get the shunt temperature coefficient. More... | |
| sfTkError_t | getDiagnosticFlags (sfe_ina2xx_diag_alrt_reg_t &flags) |
| Read the full DIAG_ALRT register. More... | |
| sfTkError_t | setAlertLatch (bool latched) |
| Enable or disable alert latching. More... | |
| sfTkError_t | getAlertLatch (bool &latched) |
| Get the alert latch setting. More... | |
| sfTkError_t | setConversionReadyAlert (bool enable) |
| Enable conversion ready flag on the ALERT pin. More... | |
| sfTkError_t | getConversionReadyAlert (bool &enabled) |
| Get the conversion ready alert enable state. More... | |
| sfTkError_t | setSlowAlert (bool enable) |
| Enable alert comparison on averaged (vs. More... | |
| sfTkError_t | getSlowAlert (bool &enabled) |
| Get the slow alert enable state. More... | |
| sfTkError_t | setAlertPolarity (bool activeHigh) |
| Set the ALERT pin polarity. More... | |
| sfTkError_t | getAlertPolarity (bool &activeHigh) |
| Get the ALERT pin polarity setting. More... | |
| sfTkError_t | isEnergyOverflow (bool &overflow) |
| Check if the energy register has overflowed (INA228 only). More... | |
| sfTkError_t | isChargeOverflow (bool &overflow) |
| Check if the charge register has overflowed (INA228 only). More... | |
| sfTkError_t | isMathOverflow (bool &overflow) |
| Check if a math overflow has occurred in current/power calculations. More... | |
| sfTkError_t | isTempOverLimit (bool &overLimit) |
| Check if the temperature over-limit flag is set. More... | |
| sfTkError_t | isShuntOverVoltage (bool &overVoltage) |
| Check if the shunt overvoltage flag is set. More... | |
| sfTkError_t | isShuntUnderVoltage (bool &underVoltage) |
| Check if the shunt undervoltage flag is set. More... | |
| sfTkError_t | isBusOverVoltage (bool &overVoltage) |
| Check if the bus overvoltage flag is set. More... | |
| sfTkError_t | isBusUnderVoltage (bool &underVoltage) |
| Check if the bus undervoltage flag is set. More... | |
| sfTkError_t | isPowerOverLimit (bool &overLimit) |
| Check if the power over-limit flag is set. More... | |
| sfTkError_t | isConversionReady (bool &ready) |
| Check if a conversion has completed. More... | |
| sfTkError_t | isMemoryValid (bool &valid) |
| Check the memory checksum status. More... | |
| sfTkError_t | setShuntOverVoltageThreshold (int16_t threshold) |
| Set the shunt overvoltage threshold. More... | |
| sfTkError_t | getShuntOverVoltageThreshold (int16_t &threshold) |
| Get the shunt overvoltage threshold. More... | |
| sfTkError_t | setShuntUnderVoltageThreshold (int16_t threshold) |
| Set the shunt undervoltage threshold. More... | |
| sfTkError_t | getShuntUnderVoltageThreshold (int16_t &threshold) |
| Get the shunt undervoltage threshold. More... | |
| sfTkError_t | setBusOverVoltageThreshold (uint16_t threshold) |
| Set the bus overvoltage threshold. More... | |
| sfTkError_t | getBusOverVoltageThreshold (uint16_t &threshold) |
| Get the bus overvoltage threshold. More... | |
| sfTkError_t | setBusUnderVoltageThreshold (uint16_t threshold) |
| Set the bus undervoltage threshold. More... | |
| sfTkError_t | getBusUnderVoltageThreshold (uint16_t &threshold) |
| Get the bus undervoltage threshold. More... | |
| sfTkError_t | setTempLimitThreshold (int16_t threshold) |
| Set the temperature over-limit threshold. More... | |
| sfTkError_t | getTempLimitThreshold (int16_t &threshold) |
| Get the temperature over-limit threshold. More... | |
| sfTkError_t | setPowerLimitThreshold (uint16_t threshold) |
| Set the power over-limit threshold. More... | |
| sfTkError_t | getPowerLimitThreshold (uint16_t &threshold) |
| Get the power over-limit threshold. More... | |
Additional Inherited Members | |
| Protected Member Functions inherited from sfDevINA2XX | |
| sfTkError_t | readRegister24 (uint8_t reg, uint32_t &value) |
| Read 3 bytes (24-bit) from a register into a uint32_t. More... | |
| sfTkError_t | readRegister40 (uint8_t reg, uint64_t &value) |
| Read 5 bytes (40-bit) from a register into a uint64_t. More... | |
| sfTkError_t | calibrateImpl (float shuntResOhms, float maxCurrentA, float calScale, float currentFullScale) |
| Shared calibration math; only the two scale constants differ per device. More... | |
| sfTkError_t | powerToWatts (float &watts, float powerLSBScale) |
Shared POWER -> watts conversion. powerLSBScale is 3.2 (INA228) or 0.2 (INA237). More... | |
| sfTkError_t | dieTemperatureToCelsius (float &celsius, uint8_t shift, float tempLSB) |
| Shared DIETEMP -> Celsius conversion. More... | |
| sfTkError_t | readPowerRaw (uint32_t &value) |
| Shared raw POWER read (24-bit, unsigned) — identical on both devices. More... | |
| template<typename T , bool Wide> | |
| sfTkError_t | readSignedMeasurementRaw (uint8_t reg, T &value) |
| Shared raw read for a signed measurement register (shunt voltage, current). More... | |
| template<typename T , bool Wide> | |
| sfTkError_t | readUnsignedMeasurementRaw (uint8_t reg, T &value) |
| Shared raw read for an unsigned measurement register (bus voltage). More... | |
| template<typename T , bool Wide> | |
| sfTkError_t | shuntVoltageToMilliVolts (float &milliVolts, float lsbDefault, float lsbReduced) |
| Shared VSHUNT -> millivolts conversion (reads raw, then scales by the range LSB). More... | |
| template<typename T , bool Wide> | |
| sfTkError_t | busVoltageToVolts (float &volts, float busLSB) |
| Shared VBUS -> volts conversion. More... | |
| template<typename T , bool Wide> | |
| sfTkError_t | currentToAmps (float &s) |
| Shared CURRENT -> amps conversion (scales by the calibrated CURRENT_LSB). More... | |
| Protected Attributes inherited from sfDevINA2XX | |
| sfTkIBus * | _theBus |
| Pointer to the communication bus device. More... | |
| float | _currentLSB |
| Current measurement LSB in Amps, set during calibration. More... | |
| bool | _adcRange |
| Cached ADC range: false = +/-163.84mV, true = +/-40.96mV. More... | |
| float | _shuntRes |
| Shunt resistance in Ohms, stored during calibration. More... | |
| Static Protected Attributes inherited from sfDevINA237 | |
| static constexpr float | kCalScale = 819.2e6f |
| Calibration scale constant. More... | |
| static constexpr float | kShuntLSBDefault = 5.0e-6f |
| Shunt LSB in volts (ADCRANGE = 0). More... | |
| static constexpr float | kShuntLSBReduced = 1.25e-6f |
| Shunt LSB in volts (ADCRANGE = 1). More... | |
| static constexpr float | kBusLSB = 3.125e-3f |
| Bus voltage LSB in volts. More... | |
| static constexpr float | kTempLSB = 125.0e-3f |
| Die temperature LSB in deg-C. More... | |
| static constexpr float | kCurrentFullScale = 32768.0f |
| 2^15, positive half of the 16-bit ADC. More... | |
| static constexpr float | kPowerLSBScale = 0.2f |
| Power LSB = 0.2 x CURRENT_LSB. More... | |
| static constexpr uint8_t | kDieTempShift = 4 |
| DIETEMP data is a 12-bit value in [15:4]. More... | |
| Static Protected Attributes inherited from sfDevINA2XX | |
| static const uint8_t | kI2CAddress = 0x40 |
| Default 7-bit I2C address for the SparkFun Qwiic Power Monitor board. More... | |
| static const uint8_t | kRegConfig = 0x00 |
| Configuration register (16-bit, R/W) More... | |
| static const uint8_t | kRegAdcConfig = 0x01 |
| ADC Configuration register (16-bit, R/W) More... | |
| static const uint8_t | kRegShuntCal = 0x02 |
| Shunt Calibration register (16-bit, R/W) More... | |
| static const uint8_t | kRegShuntTempCo = 0x03 |
| Shunt Temperature Coefficient (16-bit, R/W) More... | |
| static const uint8_t | kRegVShunt = 0x04 |
| Shunt Voltage Measurement (24/16-bit, R) More... | |
| static const uint8_t | kRegVBus = 0x05 |
| Bus Voltage Measurement (24/16-bit, R) More... | |
| static const uint8_t | kRegDieTemp = 0x06 |
| Die Temperature Measurement (16-bit, R) More... | |
| static const uint8_t | kRegCurrent = 0x07 |
| Current Result (24/16-bit, R) More... | |
| static const uint8_t | kRegPower = 0x08 |
| Power Result (24-bit, R) More... | |
| static const uint8_t | kRegEnergy = 0x09 |
| Energy Result (40-bit, R) – INA228 only. More... | |
| static const uint8_t | kRegCharge = 0x0A |
| Charge Result (40-bit, R) – INA228 only. More... | |
| static const uint8_t | kRegDiagAlrt = 0x0B |
| Diagnostic Flags and Alert (16-bit, R/W) More... | |
| static const uint8_t | kRegSOVL = 0x0C |
| Shunt Overvoltage Threshold (16-bit, R/W) More... | |
| static const uint8_t | kRegSUVL = 0x0D |
| Shunt Undervoltage Threshold (16-bit, R/W) More... | |
| static const uint8_t | kRegBOVL = 0x0E |
| Bus Overvoltage Threshold (16-bit, R/W) More... | |
| static const uint8_t | kRegBUVL = 0x0F |
| Bus Undervoltage Threshold (16-bit, R/W) More... | |
| static const uint8_t | kRegTempLimit = 0x10 |
| Temperature Over-Limit Threshold (16-bit, R/W) More... | |
| static const uint8_t | kRegPowerLimit = 0x11 |
| Power Over-Limit Threshold (16-bit, R/W) More... | |
| static const uint8_t | kRegManufacturerID = 0x3E |
| Manufacturer ID (16-bit, R) – reads 0x5449 ("TI") More... | |
| static const uint8_t | kRegDeviceID = 0x3F |
| Device ID (16-bit, R) More... | |
| static const uint16_t | kShuntCalMask = 0x7FFF |
| SHUNT_CAL valid bits [14:0] (bit 15 reserved) More... | |
| static const uint16_t | kBusThresholdMask = 0x7FFF |
| BOVL/BUVL valid bits [14:0] (bit 15 reserved) More... | |
| static const uint16_t | kShuntTempCoMask = 0x3FFF |
| TEMPCO field mask, bits [13:0]. More... | |
| static const uint16_t | kINA228DeviceIDValue = 0x2280 |
| INA228 device ID (upper 12 bits) More... | |
| static const uint16_t | kINA237DeviceIDValue = 0x2370 |
| INA237 device ID (upper 12 bits) More... | |
| static const uint16_t | kINA238DeviceIDValue = 0x2380 |
| INA238 device ID (register-compatible with INA237) More... | |
| static const uint16_t | kDeviceIDMask = 0xFFF0 |
| Mask for device ID (ignore revision) More... | |
| static const uint16_t | kManufacturerIDValue = 0x5449 |
| "TI" in ASCII More... | |
Arduino I2C implementation for the INA237 power monitor.
This class provides Arduino-specific I2C communication for the INA237. It inherits all register access and measurement methods from sfDevINA237 and adds the begin() and isConnected() methods required for Arduino initialization.
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Initializes the INA237 with I2C communication.
Performs the following initialization:
| address | 7-bit I2C address (default: 0x40) |
| wirePort | TwoWire instance for I2C communication (default: Wire) |
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Checks if the INA237 is connected and responding.
Pings the device at the configured I2C address and verifies identity by reading the Device ID register. Expects the upper 12 bits to match 0x237.
1.9.5