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95 lines
3.4 KiB
Markdown
95 lines
3.4 KiB
Markdown
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[](https://github.com/marketplace/actions/arduino_ci)
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[](https://github.com/RobTillaart/ADG725/actions/workflows/arduino-lint.yml)
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[](https://github.com/RobTillaart/ADG725/actions/workflows/jsoncheck.yml)
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[](https://github.com/RobTillaart/ADG725/issues)
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[](https://github.com/RobTillaart/ADG725/blob/master/LICENSE)
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[](https://github.com/RobTillaart/ADG725/releases)
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[](https://registry.platformio.org/libraries/robtillaart/ADG725)
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# ADG725
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Arduino library for ADG725 - 16 to 1 channel (2x) multiplexer.
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## Description
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**Experimental**
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ADG725 is an Arduino class that controls two 16 to 1 multiplexers
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(or 1 to 16 multiplexer) over a SPI like interface.
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The channel selection is disjunct which means that only
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one of the 16 channels can be connected (selected) at the same time.
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The channels can be set per multiplexer or together (same channel) in one call.
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The library also support to set them all off (17th state).
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On power-up, all switches are in the OFF state, so no channel is selected.
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This library can be used e.g. to connect 16 analog devices (potmeters) to
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one analog port, or to select between 16 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 "ADG725.h"
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```
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- **ADG725(uint8_t clockPin, uint8_t dataPin, uint8_t syncPin)** constructor.
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- **void setChannel(uint8_t channel)** set the current channel for both A and B.
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Valid values for channel are 0..15.
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- **void setChannelA(uint8_t channel)** set the current channel for A only.
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Valid values for channel are 0..15.
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- **void setChannelB(uint8_t channel)** set the current channel for B only.
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Valid values for channel are 0..15.
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- **uint8_t getChannelA()** get last set channel A == 0..15 or ADG725_ALLOFF (128).
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- **uint8_t getChannelB()** get last set channel B == 0..15 or ADG725_ALLOFF (128).
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- **uint8_t channelCount()** returns 16 for ADG725, convenience for loops.
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- **void allOff()** sets all channels to OFF, no channel 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 ADG726 (interface)
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#### Should
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- add examples
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- check performance
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#### Could
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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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