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