mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-09-20 00:55:58 -04:00
94 lines
2.3 KiB
C++
94 lines
2.3 KiB
C++
#pragma once
|
|
//
|
|
// FILE: MCP23S17.h
|
|
// AUTHOR: Rob Tillaart
|
|
// VERSION: 0.1.0
|
|
// PURPOSE: Arduino library for SPI MCP23S17 16 channel port expander
|
|
// DATE: 2021-12-30
|
|
// URL: https://github.com/RobTillaart/MCP23S17_RT
|
|
|
|
|
|
#include "Arduino.h"
|
|
#include "SPI.h"
|
|
|
|
|
|
#define MCP23S17_LIB_VERSION (F("0.1.0"))
|
|
|
|
#define MCP23S17_OK 0x00
|
|
#define MCP23S17_PIN_ERROR 0x81
|
|
#define MCP23S17_SPI_ERROR 0x82
|
|
#define MCP23S17_VALUE_ERROR 0x83
|
|
#define MCP23S17_PORT_ERROR 0x84
|
|
|
|
|
|
#define MCP23S17_INVALID_READ -100
|
|
|
|
|
|
class MCP23S17
|
|
{
|
|
public:
|
|
// MCP23S17();
|
|
|
|
MCP23S17(uint8_t select, uint8_t dataIn, uint8_t dataOut, uint8_t clock, uint8_t address = 0x00);
|
|
MCP23S17(uint8_t select, uint8_t address = 0x00);
|
|
|
|
bool begin();
|
|
bool isConnected(); // needed ?
|
|
|
|
|
|
// single pin interface
|
|
// mode = INPUT, OUTPUT or INPUT_PULLUP (==INPUT)
|
|
bool pinMode(uint8_t pin, uint8_t mode);
|
|
bool digitalWrite(uint8_t pin, uint8_t value);
|
|
uint8_t digitalRead(uint8_t pin);
|
|
|
|
bool setPolarity(uint8_t pin, bool reversed);
|
|
bool getPolarity(uint8_t pin, bool &reversed);
|
|
bool setPullup(uint8_t pin, bool pullup);
|
|
bool getPullup(uint8_t pin, bool &pullup);
|
|
|
|
|
|
// 8 pins interface
|
|
// port = 0..1
|
|
// value = bit pattern
|
|
bool pinMode8(uint8_t port, uint8_t value);
|
|
bool write8(uint8_t port, uint8_t value);
|
|
int read8(uint8_t port);
|
|
|
|
|
|
bool setPolarity8(uint8_t port, uint8_t mask);
|
|
bool getPolarity8(uint8_t port, uint8_t &mask);
|
|
bool setPullup8(uint8_t port, uint8_t mask);
|
|
bool getPullup8(uint8_t port, uint8_t &mask);
|
|
|
|
// speed in Hz
|
|
void setSPIspeed(uint32_t speed);
|
|
uint32_t getSPIspeed() { return _SPIspeed; };
|
|
|
|
// debugging
|
|
bool usesHWSPI() { return _hwSPI; };
|
|
int lastError();
|
|
|
|
private:
|
|
bool writeReg(uint8_t reg, uint8_t value);
|
|
uint8_t readReg(uint8_t reg);
|
|
|
|
uint8_t _address = 0;
|
|
uint8_t _select = 0;
|
|
uint8_t _dataOut = 0;
|
|
uint8_t _dataIn = 0;
|
|
uint8_t _clock = 0;
|
|
uint8_t _error = MCP23S17_OK;
|
|
|
|
bool _hwSPI = false;
|
|
uint32_t _SPIspeed = 8000000UL; // 1MHz is a safe value TODO CHECK datasheet
|
|
SPIClass * mySPI;
|
|
SPISettings _spi_settings;
|
|
|
|
uint8_t swSPI_transfer(uint8_t val);
|
|
};
|
|
|
|
|
|
// -- END OF FILE --
|
|
|