mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
162 lines
4.5 KiB
C++
162 lines
4.5 KiB
C++
#pragma once
|
|
//
|
|
// FILE: MCP23S17.h
|
|
// AUTHOR: Rob Tillaart
|
|
// VERSION: 0.5.3
|
|
// PURPOSE: Arduino library for SPI MCP23S17 16 channel port expander
|
|
// DATE: 2021-12-30
|
|
// URL: https://github.com/RobTillaart/MCP23S17
|
|
|
|
|
|
#include "Arduino.h"
|
|
#include "SPI.h"
|
|
#include "MCP23x17_registers.h"
|
|
|
|
|
|
#define MCP23S17_LIB_VERSION (F("0.5.3"))
|
|
|
|
// ERROR CODES
|
|
#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_REGISTER_ERROR 0xFF
|
|
#define MCP23S17_INVALID_READ 0xFF
|
|
|
|
|
|
#ifndef __SPI_CLASS__
|
|
// MBED must be tested before RP2040
|
|
#if defined(ARDUINO_ARCH_MBED)
|
|
#define __SPI_CLASS__ SPIClass
|
|
#elif defined(ARDUINO_ARCH_RP2040)
|
|
#define __SPI_CLASS__ SPIClassRP2040
|
|
#else
|
|
#define __SPI_CLASS__ SPIClass
|
|
#endif
|
|
#endif
|
|
|
|
|
|
const uint32_t MCP23S17_TYP_SPI_SPEED = 8000000;
|
|
const uint32_t MCP23S17_MAX_SPI_SPEED = 10000000;
|
|
|
|
|
|
class MCP23S17
|
|
{
|
|
public:
|
|
// SOFTWARE SPI
|
|
MCP23S17(uint8_t select, uint8_t dataIn, uint8_t dataOut, uint8_t clock, uint8_t address = 0x00);
|
|
// HARDWARE SPI
|
|
MCP23S17(int select, __SPI_CLASS__ * spi);
|
|
MCP23S17(int select, int address = 0x00, __SPI_CLASS__ * spi = &SPI);
|
|
|
|
bool begin(bool pullup = true);
|
|
bool isConnected();
|
|
uint8_t getAddress(); // default returns 0x00
|
|
|
|
|
|
// single pin interface
|
|
// mode: 0 = OUTPUT, 1 = INPUT, 1 = INPUT_PULLUP (==INPUT)
|
|
bool pinMode1(uint8_t pin, uint8_t mode);
|
|
bool write1(uint8_t pin, uint8_t value);
|
|
uint8_t read1(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);
|
|
|
|
|
|
// 16 pins interface
|
|
// value = bit pattern
|
|
bool pinMode16(uint16_t value);
|
|
bool write16(uint16_t value);
|
|
uint16_t read16();
|
|
|
|
bool setPolarity16(uint16_t mask);
|
|
bool getPolarity16(uint16_t &mask);
|
|
bool setPullup16(uint16_t mask);
|
|
bool getPullup16(uint16_t &mask);
|
|
|
|
|
|
// INTERRUPTS (experimental)
|
|
// pin = 0..15, mode = { RISING, FALLING, CHANGE }
|
|
bool enableInterrupt(uint8_t pin, uint8_t mode);
|
|
bool disableInterrupt(uint8_t pin);
|
|
|
|
// mask = 0x0000..0xFFFF (overrides all earlier settings.
|
|
bool enableInterrupt16(uint16_t mask, uint8_t mode);
|
|
bool disableInterrupt16(uint16_t mask);
|
|
|
|
// which pins caused the INT?
|
|
uint16_t getInterruptFlagRegister();
|
|
uint16_t getInterruptCaptureRegister();
|
|
|
|
// polarity: 0 = LOW, 1 = HIGH, 2 = NONE/ODR
|
|
bool setInterruptPolarity(uint8_t polarity);
|
|
uint8_t getInterruptPolarity();
|
|
|
|
// merge INTA and INTB
|
|
bool mirrorInterrupts(bool on);
|
|
bool isMirroredInterrupts();
|
|
|
|
|
|
// SPI
|
|
// speed in Hz
|
|
void setSPIspeed(uint32_t speed);
|
|
uint32_t getSPIspeed() { return _SPIspeed; };
|
|
|
|
// debugging
|
|
bool usesHWSPI() { return _hwSPI; };
|
|
int lastError();
|
|
|
|
// set/clear IOCR bit fields
|
|
bool enableControlRegister(uint8_t mask);
|
|
bool disableControlRegister(uint8_t mask);
|
|
// 0.2.5 experimental
|
|
bool enableHardwareAddress();
|
|
bool disableHardwareAddress();
|
|
|
|
|
|
protected:
|
|
// access to low level registers (just make these functions public).
|
|
// USE WITH CARE !!!
|
|
bool writeReg(uint8_t reg, uint8_t value);
|
|
uint8_t readReg(uint8_t reg);
|
|
bool writeReg16(uint8_t reg, uint16_t value);
|
|
uint16_t readReg16(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 = true;
|
|
|
|
// 10 MHz is maximum, 8 is a better clock divider on AVR.
|
|
uint32_t _SPIspeed = MCP23S17_TYP_SPI_SPEED;
|
|
__SPI_CLASS__ * _mySPI;
|
|
SPISettings _spi_settings;
|
|
|
|
uint8_t swSPI_transfer(uint8_t val);
|
|
};
|
|
|
|
|
|
// -- END OF FILE --
|
|
|