mirror of
https://github.com/RobTillaart/Arduino.git
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96 lines
2.2 KiB
C
96 lines
2.2 KiB
C
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#pragma once
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//
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// FILE: TCA9555.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.1
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// PURPOSE: Arduino library for I2C TCA9555 16 channel port expander
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// DATE: 2021-06-09
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// URL: https://github.com/RobTillaart/TCA9555
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#include "Arduino.h"
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#include "Wire.h"
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#define TCA9555_LIB_VERSION (F("0.1.1"))
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#define TCA9555_OK 0x00
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#define TCA9555_PIN_ERROR 0x81
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#define TCA9555_I2C_ERROR 0x82
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#define TCA9555_VALUE_ERROR 0x83
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#define TCA9555_PORT_ERROR 0x84
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#define TCA9555_INVALID_READ -100
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class TCA9555
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{
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public:
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TCA9555(uint8_t address, TwoWire *wire = &Wire);
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#if defined(ESP8266) || defined(ESP32)
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bool begin(const uint8_t dataPin, const uint8_t clockPin);
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#endif
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bool begin();
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bool isConnected();
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// 1 PIN INTERFACE
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// pin = 0..15
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// mode = INPUT, OUTPUT (INPUT_PULLUP is not supported)
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// value = LOW, HIGH
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bool pinMode(uint8_t pin, uint8_t mode);
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bool digitalWrite(uint8_t pin, uint8_t value);
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uint8_t digitalRead(uint8_t pin);
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bool setPolarity(uint8_t pin, uint8_t value); // input pins only.
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uint8_t getPolarity(uint8_t pin);
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// 8 PIN INTERFACE
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// port = 0..1
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// mask = bitpattern
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bool pinMode8(uint8_t port, uint8_t mask);
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bool write8(uint8_t port, uint8_t mask);
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int read8(uint8_t port);
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bool setPolarity8(uint8_t port, uint8_t value);
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uint8_t getPolarity8(uint8_t port);
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// 16 PIN INTERFACE
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// wraps 2x 8 PIN call.
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// opportunistic implementation of functions
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// needs error checking in between calls
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// mask = bitpattern
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bool pinMode16(uint16_t mask);
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bool write16(uint16_t mask);
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uint16_t read16();
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bool setPolarity16(uint16_t mask);
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uint8_t getPolarity16();
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int lastError();
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protected:
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bool writeRegister(uint8_t reg, uint8_t value);
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uint8_t readRegister(uint8_t reg);
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uint8_t _address;
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TwoWire* _wire;
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uint8_t _error;
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};
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/////////////////////////////////////////////////////////////////////////////
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//
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// TCA9535 class which is just a wrapper (for now)
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//
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class TCA9535 : public TCA9555
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{
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TCA9535(uint8_t address, TwoWire *wire = &Wire);
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};
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// -- END OF FILE --
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