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Parallax P8X32A/Propeller driver object for the Silicon Labs Si114x UV/Proximity/Ambient light sensor

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avsa242/si114x-spin

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si114x-spin


This is a P8X32A/Propeller driver object for the Silicon Labs Si114x (5, 6, 7) series UV/Proximity/Ambient light sensors.

IMPORTANT: This software is meant to be used with the spin-standard-library (P8X32A) or p2-spin-standard-library (P2X8C4M64P). Please install the applicable library first before attempting to use this code, otherwise you will be missing several files required to build the project.

Salient Features

  • I2C connection at up to 3.4MHz (tested at 400kHz)
  • Read ambient light sensor (IR, Visible) raw data
  • Read Auxiliary and UV data channels (UV index unverified)
  • Flags indicating measurement overflow for IR and visible light sensors
  • One-shot and continuous measurement modes
  • Set IR and Visible light sensor gains
  • Set custom UV index calibration coefficients
  • Measure illuminance, in lux

Requirements

P1/SPIN1:

  • spin-standard-library
  • 1 extra core/cog for the PASM I2C engine

P2/SPIN2:

  • p2-spin-standard-library

Compiler Compatibility

Processor Language Compiler Backend Status
P1 SPIN1 FlexSpin (6.9.4) Bytecode OK
P1 SPIN1 FlexSpin (6.9.4) Native/PASM OK
P2 SPIN2 FlexSpin (6.9.4) NuCode Untested
P2 SPIN2 FlexSpin (6.9.4) Native/PASM2 OK

(other versions or toolchains not listed are not supported, and may or may not work)

Limitations

  • Very early in development - may malfunction, or outright fail to build
  • Doesn't support proximity sensor function
  • Doesn't support alternate slave address usage/programming
  • Doesn't support temp sensor/Vdd/Vss reading (not currently planned)
  • Measurement calibration/correction/calculation unverified