cedargrove_nau7802
¶
A CircuitPython driver class for the NAU7802 24-bit ADC. Supports dual analog inputs.
Author(s): JG
Implementation Notes¶
Hardware:
Software and Dependencies:
Adafruit CircuitPython firmware for the supported boards: https://circuitpython.org/downloads
Adafruit’s Bus Device library: https://github.com/adafruit/Adafruit_CircuitPython_BusDevice
Adafruit’s Register library: https://github.com/adafruit/Adafruit_CircuitPython_Register
- class cedargrove_nau7802.CalibrationMode¶
Calibration mode state settings.
- class cedargrove_nau7802.ConversionRate¶
ADC conversion rate settings.
- class cedargrove_nau7802.Gain¶
Analog differential amplifier gain settings.
- class cedargrove_nau7802.LDOVoltage¶
Internal low-dropout voltage regulator settings.
- class cedargrove_nau7802.NAU7802(i2c_bus, address=42, active_channels=1)¶
The primary NAU7802 class.
- available()¶
Read the ADC data-ready status. True when data is available; False when ADC data is unavailable.
- calibrate(mode='INTERNAL')¶
Perform the calibration procedure. Valid calibration modes are ‘INTERNAL’, ‘OFFSET’, and ‘GAIN’. True if successful.
- property channel¶
Selected channel number (1 or 2).
- property chip_revision¶
The chip revision code.
- enable(power=True)¶
Enable(start) or disable(stop) the internal analog and digital systems power. Enable = True; Disable (low power) = False. Returns True when enabled; False when disabled.
- property gain¶
The programmable amplifier (PGA) gain factor.
- property ldo_voltage¶
Representation of the LDO voltage value.
- property poll_rate¶
ADC conversion/polling rate.
- read()¶
Reads the 24-bit ADC data. Returns a signed integer value with 24-bit resolution. Assumes that the ADC data-ready bit was checked to be True.
- reset()¶
Resets all device registers and enables digital system power. Returns the power ready status bit value: True when system is ready; False when system not ready for use.