arduino / arduino/ArduinoCore-mbed
Apparent 'stuck bit' in ADC readings
- Dominant language
- C
- Stars
- 411
- Forks
- 225
- PR merge metrics
- No merged PRs in 30d
Description
Configuration:
DC voltage into A8
Starting voltage: 0V incrementing in 1.5mV steps.
Between approximately 0.2049V and 0.2197V the ADC reading is 4054 (16 bit resolution) or 252 (12 bit resolution)
The chart above shows the very strange behaviour. Notice the other discontinuities above and below. Sorry for the very poor annotations!
Board firmware version: 4.2.4
Any thought on am mbed interim workaround?
Many thanks
Contributor guide
No contributing guide indexed for this repository
Research direction
No source file or test is named. Start by reproducing the ADC sweep on A8 with the reported 0–0.2197 V range using firmware 4.2.4, then inspect the ADC configuration and reading path. Done means explaining the discontinuities and documenting or validating an interim workaround.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- c
- Domain
- embedded-iot
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 25/100