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https://github.com/RobTillaart/Arduino.git
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122 lines
2.9 KiB
C++
122 lines
2.9 KiB
C++
#pragma once
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//
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// FILE: TCA9548.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.2.2
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// DATE: 2021-03-16
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// PURPOSE: Arduino Library for TCA9548 I2C multiplexer and compatibles.
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// URL: https://github.com/RobTillaart/TCA9548
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#include "Arduino.h"
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#include "Wire.h"
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#define TCA9548_LIB_VERSION (F("0.2.2"))
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// ERROR CODES (to be elaborated)
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#define TCA9548_OK 0
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#define TCA9548_ERROR_I2C -10 // not used yet
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#define TCA9548_ERROR_CHANNEL -20 // not used yet
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class TCA9548
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{
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public:
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// deviceAddress = 0x70 .. 0x77
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TCA9548(uint8_t deviceAddress, TwoWire *wire = &Wire);
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bool begin(uint8_t mask = 0x00); // default no channels enabled
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bool isConnected(); // find multiplexer on I2C bus
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bool isConnected(uint8_t address); // find any address on I2C bus
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bool isConnected(uint8_t address, uint8_t channel); // find address on selected channel
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// channel = 0..channelCount()-1
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uint8_t channelCount();
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bool enableChannel(uint8_t channel); // enable this channel non exclusive
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bool disableChannel(uint8_t channel);
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bool selectChannel(uint8_t channel); // enable only this channel
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bool isEnabled(uint8_t channel);
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bool disableAllChannels();
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// mask = 0x00 .. 0xFF - every bit is a channel.
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// although not for derived types.
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// note 1: these are set simultaneously.
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// note 2: these may include interrupt bits (in derived classes)
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bool setChannelMask(uint8_t mask);
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uint8_t getChannelMask();
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// reset
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void setResetPin(uint8_t resetPin);
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void reset(); // trigger reset pin
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// set forced IO (default false)
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void setForced(bool forced = false);
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bool getForced();
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int getError();
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protected:
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uint8_t _address;
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TwoWire* _wire;
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uint8_t _mask; // caching mask = status of channels
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uint8_t _resetPin; // default not set == -1 (255)
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bool _forced;
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int _error;
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uint8_t _channels; // PCA954x support.
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};
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/////////////////////////////////////////////////////////////
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//
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// DERIVED CLASS
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//
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// see - https://github.com/RobTillaart/TCA9548/issues/15
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//
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// SWITCH, 8 channel + reset
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class PCA9548 : public TCA9548
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{
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public:
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PCA9548(uint8_t deviceAddress, TwoWire *wire = &Wire);
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};
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// SWITCH, 4 channel + reset
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class PCA9546 : public TCA9548
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{
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public:
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PCA9546(uint8_t deviceAddress, TwoWire *wire = &Wire);
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uint8_t getChannelMask();
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};
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// DEVICES WITH INTERRUPT
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// SWITCH, 4 channel + reset + interrupt
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class PCA9545 : public TCA9548
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{
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public:
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PCA9545(uint8_t deviceAddress, TwoWire *wire = &Wire);
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uint8_t getChannelMask();
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uint8_t getInterruptMask();
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};
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// SWITCH, 2 channel + reset + interrupt
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class PCA9543 : public TCA9548
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{
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public:
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PCA9543(uint8_t deviceAddress, TwoWire *wire = &Wire);
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uint8_t getChannelMask();
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uint8_t getInterruptMask();
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};
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// -- END OF FILE --
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