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115 lines
4.0 KiB
Markdown
115 lines
4.0 KiB
Markdown
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[](https://github.com/marketplace/actions/arduino_ci)
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[](https://github.com/RobTillaart/HC4053/actions/workflows/arduino-lint.yml)
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[](https://github.com/RobTillaart/HC4053/actions/workflows/jsoncheck.yml)
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[](https://github.com/RobTillaart/HC4053/blob/master/LICENSE)
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[](https://github.com/RobTillaart/HC4053/releases)
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# HC4053
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HC4053 is an Arduino library for a HC4053 3x2 channel multiplexer.
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## Description
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HC4053 is a library to control the CD74HC4053 3x2 channel
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multiplexer / demultiplexer and compatible devices.
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The HC4053 is in fact three separate controllable switches in one,
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and every switch can be set indepently in one of two positions.
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This is functionaly different from both the 4051, 4052 and 4067
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in which there is only one channel selection
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The independent channel selection is done with three select lines **A, B, C**.
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The device can be enabled/disabled by the enable line **INH**
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#### Compatibles
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to elaborate.
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#### Related to
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- https://github.com/RobTillaart/HC4051
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- https://github.com/RobTillaart/HC4052
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- https://github.com/RobTillaart/HC4053
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- https://github.com/RobTillaart/HC4067
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## Hardware connection
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Typical connection is to connect the three **select pins** to three IO Pins of your board.
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The optional **enablePin (INH)** must be connected to GND if not used.
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This way the device is continuous enabled.
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Example multiplexing 3x analog in.
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```
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processor HC4053
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+-------------+ +-------------+
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| E |------------->| INH |
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| A |------------->| A X0 |
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| analog X |<-------------| X X1 |
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| | | |
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| B |------------->| B Y0 |
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| analog Y |<-------------| Y Y1 |
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| C |------------->| C Z0 |
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| analog Z |<-------------| Z Z1 |
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| GND |--------------| GND |
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| | | VCC |
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+-------------+ +-------------+
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```
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## Interface
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```cpp
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#include "HC4053.h"
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```
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#### Core
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- **HC4053(uint8_t A, uint8_t B, uint8_t C, uint8_t enablePin = 255)** constructor.
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Set the three select pins and optional the enable pin.
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If the enablePin == 255 it is considered not used.
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- **void setChannel(uint8_t channel)** sets A, B and C to channel in one call.
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Think of it as a master switch.
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Valid values 0, 1, this value is not checked, only last bit is used.
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Note the channels will not change at the very same moment.
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- **void setChannelA(uint8_t channel)** sets A to channel.
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Valid values 0, 1, this value is not checked, only last bit is used.
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- **void setChannelB(uint8_t channel)** sets B to channel.
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Valid values 0, 1, this value is not checked, only last bit is used.
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- **void setChannelC(uint8_t channel)** sets C to channel.
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Valid values 0, 1, this value is not checked, only last bit is used.
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- **uint8_t getChannelA()** get current A channel 0 or 1.
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- **uint8_t getChannelB()** get current B channel 0 or 1.
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- **uint8_t getChannelC()** get current C channel 0 or 1.
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#### Enable
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These functions work only if enablePin is set in the constructor.
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- **void enable()** idem.
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- **void disable()** idem.
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- **bool isEnabled()** idem.
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Also returns true if enablePin is not set.
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## Future
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- keep in sync with HC4067 et.al.
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