Releases: adafruit/CircuitPython_NAU7802
2.1.1 - add README pip3 instructions
2.1.0 - add selection of polling rate
What's Changed
- enable selection of polling rate by @semininja in #10
New Contributors
- @semininja made their first contribution in #10
Full Changelog: 2.0.0...2.1.0
Contributors
Assets 8
2.0.0 - Added to Adafruit Bundle
Added library to Adafruit CircuitPython Bundle.
To use in CircuitPython, simply install the Adafruit CircuitPython Bundle.
To use in CPython, pip3 install cedargrove-nau7802.
Read the docs for info on how to use it.
Channel Change Improvements
Two issues were addressed in this release.
The first was ghosting of unread data left in the device data register after changing channels making it appear that the data was coming from the newly selected channel.
The second was a change to how the Cycle Ready (CR) flag is monitored after a channel change. The channel change process takes at least five conversion cycles (approximately 500ms) to fully prepare the ADC with channel offset and calibration settings. When switching from channel two to channel one, the CR flag will indicate that the channel switch settling had elapsed but is still in progress. Clearing the data buffer prior to changing channels fixes this issue, but the flag monitoring logic was set to only return from the channel change function when the CR flag indicated completion, creating a potential endless loop if timing isn't perfect. The CR check now times out after one second and returns False if the CR flag wasn't set.
Tested on a Clue and PyPortal Titano with the CedarGrove dual-channel NAU7802 wing as well as the Adafruit NAU7802 Stemma breakout.
include fixed settling time for channel change
1.6.3 include default settling time for channel change
reduce sample averaging count in example
1.6.2 Update nau7802_simpletest.py
Reset default sample rate; update simpletest example
Restored the default ADC conversion rate to 10 samples per second after eliminating a racing condition caused by a fixed delay in the driver's channel setter. The setter now waits for the Cycle Ready (CR) flag. Successfully tested channel setting for all conversion rates. Note: high sample rates are inherently less accurate but may be useful for some applications.
Updated nau7802_simpletest.py to wait for the CR flag when acquiring data.
Both changes are expected to be transparent to all existing applications.
Also remove the outdated Clue Scale examples. They have been replaced by the Adafruit Clue Scale guide.
Thank you to @Swicano for discovering the initial issue in nau7802_simpletest.py that revealed the timing problem.
Change default sample rate; update simpletest example
Increased the default ADC conversion rate from 10 to 20 samples per second to eliminate a racing error where the conversion completion (Cycle Ready) flag wasn't consistently set. The error made it appear that the ADC data wasn't available. Successfully tested conversion rates up to 320 sps. Note: high sample rates are inherently less accurate but may be useful for some applications.
Fixed an error in the simpletest example was causing the example to continuously read the ADC data, ignoring the conversion completion (Cycle Ready) flag.
Both changes are expected to be transparent to all existing applications.
Thank you to @Swicano for discovering the issue in simpletest that revealed the timing problem.
fix incorrect cookiecutter repo address insertion
1.5.9 Merge branch 'main' of https://github.com/CedarGroveStudios/CircuitPy…
refactor for learning guide
1.5.8 refactor for learning guide