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https://github.com/RobTillaart/Arduino.git
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107 lines
2.3 KiB
C++
107 lines
2.3 KiB
C++
#pragma once
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//
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// FILE: PCA9551.h
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// AUTHOR: Rob Tillaart
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// DATE: 2023-07-17
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// VERSION: 0.1.1
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// PUPROSE: Arduino library for for I2C PCA9551 8 channel PWM
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// URL: https://github.com/RobTillaart/PCA9551
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#include "Arduino.h"
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#include "Wire.h"
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#define PCA9551_LIB_VERSION (F("0.1.1"))
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// REGISTERS
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#define PCA9551_INPUT 0x00
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#define PCA9551_PSC0 0x01
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#define PCA9551_PWM0 0x02
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#define PCA9551_PSC1 0x03
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#define PCA9551_PWM1 0x04
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#define PCA9551_LS0 0x05
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#define PCA9551_LS1 0x06
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// MUX OUTPUT MODES
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#define PCA9551_MODE_LOW 0
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#define PCA9551_MODE_HIGH 1
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#define PCA9551_MODE_PWM0 2
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#define PCA9551_MODE_PWM1 3
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// ERROR CODES (not all used yet)
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#define PCA9551_OK 0x00
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#define PCA9551_ERROR 0xFF
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#define PCA9551_ERR_WRITE 0xFE
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#define PCA9551_ERR_CHAN 0xFD
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#define PCA9551_ERR_MODE 0xFC
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#define PCA9551_ERR_REG 0xFB
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#define PCA9551_ERR_I2C 0xFA
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/////////////////////////////////////////////////////
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//
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// CLASS PCA9551
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//
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class PCA9551
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{
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public:
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explicit PCA9551(const uint8_t deviceAddress, TwoWire *wire = &Wire);
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#if defined (ESP8266) || defined(ESP32)
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bool begin(int sda, int scl);
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#endif
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bool begin();
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bool isConnected();
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uint8_t reset();
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uint8_t getAddress();
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uint8_t outputCount();
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// GPIO
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uint8_t getInput();
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void pinMode(uint8_t pin, uint8_t mode);
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void digitalWrite(uint8_t pin, uint8_t value);
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uint8_t digitalRead(uint8_t pin);
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// PRESCALERS
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void setPrescaler(uint8_t generator, uint8_t prescaler = 0);
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uint8_t getPrescaler(uint8_t generator);
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// PWM
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void setPWM(uint8_t generator, uint8_t pwm = 128);
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uint8_t getPWM(uint8_t generator);
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// OUTPUT MODE - MUX SELECTION
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// pin: 0..7
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// mode:
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// 0 = output is set LOW (LED on)
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// 1 = output is set high-impedance (LED off; default)
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// 2 = output blinks at PWM0 rate
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// 3 = output blinks at PWM1 rate
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uint8_t setOutputMode(uint8_t pin, uint8_t mode);
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uint8_t getOutputMode(uint8_t pin);
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// ERROR
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uint8_t getLastError();
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private:
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uint8_t writeReg(uint8_t reg, uint8_t value);
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uint8_t readReg(uint8_t reg);
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uint8_t _address;
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uint8_t _outputCount;
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uint8_t _error;
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TwoWire* _wire;
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};
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// -- END OF FILE --
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