espp/adc

0.21.1

uploaded 4 months ago
ADC (oneshot and continuous) component for ESP-IDF
Readme Dependencies 3 Dependents 2 Examples 1 Versions 29

readme

ADC (Analog to Digital Converter) Component

This component provides some classes which encapsulate analog value sampling using the ESP's built-in ADC hardware and peripheral drivers.

Oneshot ADC

The OneshotAdc allows the user a simple, low-resource way to sporadically (and with moderate frequency needs) measure an analog voltage for multiple channels on a single ADC UNIT. It does not start or manage any tasks and does not perform any filtering on the data. Each time the user calls read_raw(adc_channel_t) or read_mv(adc_channel_t), it block and trigger an analog read for the associated channel (if it was configured to do so).

Continuous ADC

The ContinuousAdc provides a mechanism for high-frequency, continuous, deterministic sampling of analog voltages for multiple channels (potentially across multiple ADC units, depending on the ESP32 chip used). It does this be enabling the continuous ADC DMA mode and then running its own task which retrieves the data and filters it. When the user calls get_mv(adc_channel_t), it simply returns the most recent filtered value for that channel, if it was configured.

Example

There is an example which shows the use of the espp::OneshotAdc and the espp::ContinuousAdc components.

Links

Supports all targets

Maintainer

  • William Emfinger <waemfinger@gmail.com>

License: MIT

Tags

To add this component to your project, run:

idf.py add-dependency "espp/adc^0.21.1"

or download archive

Stats

  • Archive size
    Archive size ~ 14.63 KB
  • Downloaded in total
    Downloaded in total 2.2k times
  • Downloaded this version
    This version: 1 time

Badge

espp/adc version: 0.21.1
|
report abuse