- Added in function for returning the raw ADC response for debugging from Arduino
- Changed CalcRollingAvg to only include non-zero values from array
Note: This can be used with any AVR/Arduino that needs to interface with hardware that is based on an MCP3221
Originally written as a simple interface this driver has been extended with a couple simple averaging methods, and makes taking readings very easy. This class is extended by the MiniLib class which uses this and a few other interfaces extensively!
- Simple implementation with instancing (MCP3221 mcp3221(address,vref) for example)
- Feed it address and and measured VREF(I.E measured VDD into IC)
- readI2CADC, takes a single reading from the MCP3221 which is in constant conversion mode by default(IIRC its always in this mode)
- calcMillivolts, calls readI2CADC and uses VREF value that was input during instance creation
- calcRollingAVG, Takes current raw adc reading and adds it to a storage array(default is 10 data points), th oldest data point is dropped and array is shifted to move with readings
- calcEMAVG, approximates a rolling average by using an ALPHA coefficient and a power of 2 POWER for division, only needs a current reading which is weighted by ALPHA is pass through
- updateVRef in case a class which inherits from this one can update the vref should it be necessary
- Rolling/Moving average, uses an array to store data points, oldest is removed and current reading is added in as array is shifted to move with dataset
- Exponential moving average using power of 2 division(POWER) to avoid unnecessary float math, approximates a moving average while only using current data point
- Number of rolling average samples have been increased to 20 will wait to see if this is adequate or not.
MCP3221 Library by Ryan Edwards, Sparky's Widgets is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
