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89 lines
2.9 KiB
Markdown
89 lines
2.9 KiB
Markdown
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[](https://github.com/marketplace/actions/arduino_ci)
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[](https://github.com/RobTillaart/ADG731/actions/workflows/arduino-lint.yml)
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[](https://github.com/RobTillaart/ADG731/actions/workflows/jsoncheck.yml)
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[](https://github.com/RobTillaart/ADG731/issues)
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[](https://github.com/RobTillaart/ADG731/blob/master/LICENSE)
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[](https://github.com/RobTillaart/ADG731/releases)
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[](https://registry.platformio.org/libraries/robtillaart/ADG731)
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# ADG731
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Arduino library for ADG731 - 32 to 1 channel multiplexer.
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## Description
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**Experimental**
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ADG731 is an Arduino class that controls a 1 x 32 multiplexer over a
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SPI like interface.
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Only one of the 32 channels can be connected at the same time.
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The library also support to select none (== 33th state).
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On power-up, all switches are in the OFF state == none connected.
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This library can be used e.g. to connect 32 analog devices to
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one analog port, or to select between 32 DHT22 sensors.
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No tests with hardware have been done yet, so use with care.
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Feedback welcome!
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#### Related
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- https://github.com/RobTillaart/HC4051 (1x8 mux)
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- https://github.com/RobTillaart/HC4052 (2x8 mux)
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- https://github.com/RobTillaart/HC4053 (3x2 mux)
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- https://github.com/RobTillaart/HC4067 (1x16 mux)
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- https://github.com/RobTillaart/ADG725 (2x16 mux)
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- https://github.com/RobTillaart/ADG726 (2x16 mux)
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- https://github.com/RobTillaart/ADG731 (1x32 mux)
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- https://github.com/RobTillaart/ADG732 (1x32 mux)
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## Interface
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```cpp
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#include "ADG731.h"
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```
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- **ADG731(uint8_t clockPin, uint8_t dataPin, uint8_t syncPin)** constructor.
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- **void setChannel(uint8_t channel)** set the current channel.
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Valid values for channel are 0..31.
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Numbers larger than 31 will be "wrapped" modulo 32.
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- **uint8_t getChannel()** get last set channel == 0..31 or ADG731_ALLOFF.
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- **uint8_t channelCount()** returns 32 for ADG731.
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- **void allOff()** sets all channels to OFF, none selected.
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## Future
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#### Must
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- improve documentation
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- test with hardware
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- keep in sync with ADG732 (interface)
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#### Should
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- add examples
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#### Could
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- **bool setChannel(uint8_t channel)** return false if out of range?
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#### Wont
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## Support
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If you appreciate my libraries, you can support the development and maintenance.
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Improve the quality of the libraries by providing issues and Pull Requests, or
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donate through PayPal or GitHub sponsors.
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Thank you,
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