mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
43 lines
1.6 KiB
Markdown
43 lines
1.6 KiB
Markdown
|
|
[](https://github.com/marketplace/actions/arduino_ci)
|
|
[](https://github.com/RobTillaart/AsyncAnalog/blob/master/LICENSE)
|
|
[](https://github.com/RobTillaart/AsyncAnalog/releases)
|
|
|
|
# AsyncAnalog
|
|
|
|
Arduino Library for async reading of an analog pin. **\[AVR ONLY\]**
|
|
|
|
|
|
## Description
|
|
AsyncAnalog is a library to read the analog port in an asynchronous way.
|
|
This means that the user must explicitly **start** the ADC, check if it is **ready**
|
|
and read out its **value**.
|
|
|
|
By using this class, the user prevents the (~112 uSec) blocking of the
|
|
**analogRead()** call, and gives the user the ability to do some processing.
|
|
|
|
The library works only for AVR boards now, other platforms might be supported in the future.
|
|
|
|
As the UNO has only one ADC that is multiplexed, one can only read one analog pin
|
|
in async way simultaneously.
|
|
|
|
## Interface
|
|
|
|
- **AsyncAnalog(uint8_t pin)** constructor, defines the analog pin to use.
|
|
|
|
The library consists of three main function:
|
|
|
|
- **void start()** triggers a new ADC reading.
|
|
- **bool ready()** returns true if sample is complete
|
|
- **int value()** returns the value
|
|
|
|
## Operation
|
|
|
|
The example **asyncAnalogTest2.ino** shows a loop of 1000 analogReads and prints
|
|
over Serial at 115200 baud. The async test does this in less time. Note that faster
|
|
baudrates shows an even bigger difference.
|
|
|
|
During the printing, the sampling continues.
|
|
|
|
|