GY-63_MS5611/libraries/TCA9548/TCA9548.h
2024-04-18 17:55:18 +02:00

124 lines
3.0 KiB
C++

#pragma once
//
// FILE: TCA9548.h
// AUTHOR: Rob Tillaart
// VERSION: 0.3.0
// DATE: 2021-03-16
// PURPOSE: Arduino Library for TCA9548 I2C multiplexer and compatibles.
// URL: https://github.com/RobTillaart/TCA9548
#include "Arduino.h"
#include "Wire.h"
#define TCA9548_LIB_VERSION (F("0.3.0"))
// ERROR CODES (to be elaborated)
#define TCA9548_OK 0
#define TCA9548_ERROR_I2C -10 // not used yet
#define TCA9548_ERROR_CHANNEL -20 // not used yet
class TCA9548
{
public:
// deviceAddress = 0x70 .. 0x77
TCA9548(uint8_t deviceAddress, TwoWire *wire = &Wire);
bool begin(uint8_t mask = 0x00); // default no channels enabled
bool isConnected(); // find multiplexer on I2C bus
bool isConnected(uint8_t address); // find any address on I2C bus
bool isConnected(uint8_t address, uint8_t channel); // find address on selected channel
uint8_t find(uint8_t address); // returns a mask with channels
// channel = 0..channelCount()-1
uint8_t channelCount();
bool enableChannel(uint8_t channel); // enable this channel non exclusive
bool disableChannel(uint8_t channel);
bool selectChannel(uint8_t channel); // enable only this channel
bool isEnabled(uint8_t channel);
bool disableAllChannels();
// mask = 0x00 .. 0xFF - every bit is a channel.
// although not for derived types.
// note 1: these are set simultaneously.
// note 2: these may include interrupt bits (in derived classes)
bool setChannelMask(uint8_t mask);
uint8_t getChannelMask();
// reset
void setResetPin(uint8_t resetPin);
void reset(); // trigger reset pin
// set forced IO (default false)
void setForced(bool forced = false);
bool getForced();
int getError();
protected:
uint8_t _address;
TwoWire * _wire;
uint8_t _mask; // caching mask = status of channels
uint8_t _resetPin; // default not set == -1 (255)
bool _forced;
int _error;
uint8_t _channels; // PCA954x support.
};
/////////////////////////////////////////////////////////////
//
// DERIVED CLASS
//
// see - https://github.com/RobTillaart/TCA9548/issues/15
//
// SWITCH, 8 channel + reset
class PCA9548 : public TCA9548
{
public:
PCA9548(uint8_t deviceAddress, TwoWire *wire = &Wire);
};
// SWITCH, 4 channel + reset
class PCA9546 : public TCA9548
{
public:
PCA9546(uint8_t deviceAddress, TwoWire *wire = &Wire);
uint8_t getChannelMask();
};
// DEVICES WITH INTERRUPT
// SWITCH, 4 channel + reset + interrupt
class PCA9545 : public TCA9548
{
public:
PCA9545(uint8_t deviceAddress, TwoWire *wire = &Wire);
uint8_t getChannelMask();
uint8_t getInterruptMask();
};
// SWITCH, 2 channel + reset + interrupt
class PCA9543 : public TCA9548
{
public:
PCA9543(uint8_t deviceAddress, TwoWire *wire = &Wire);
uint8_t getChannelMask();
uint8_t getInterruptMask();
};
// -- END OF FILE --