Adafruit_MCP23XXX.h File Reference

#include <Adafruit_BusIO_Register.h>
#include <Adafruit_I2CDevice.h>
#include <Adafruit_SPIDevice.h>
#include <Arduino.h>

Go to the source code of this file.

Classes
class	Adafruit_MCP23XXX
	Base class for all MCP23XXX variants. More...

Macros
#define	MCP23XXX_IODIR   0x00
	I/O direction register.
#define	MCP23XXX_IPOL   0x01
	Input polarity register.
#define	MCP23XXX_GPINTEN   0x02
	Interrupt-on-change control register.
#define	MCP23XXX_DEFVAL   0x03
	Default compare register for interrupt-on-change.
#define	MCP23XXX_INTCON   0x04
	Interrupt control register.
#define	MCP23XXX_IOCON   0x05
	Configuration register.
#define	MCP23XXX_GPPU   0x06
	Pull-up resistor configuration register.
#define	MCP23XXX_INTF   0x07
	Interrupt flag register.
#define	MCP23XXX_INTCAP   0x08
	Interrupt capture register.
#define	MCP23XXX_GPIO   0x09
	Port register.
#define	MCP23XXX_OLAT   0x0A
	Output latch register.
#define	MCP23XXX_ADDR   0x20
	Default I2C Address.
#define	MCP23XXX_SPIREG   ADDRESSED_OPCODE_BIT0_LOW_TO_WRITE
	SPI register type.
#define	MCP_PORT(pin)   ((pin < 8) ? 0 : 1)
	Determine port from pin number.
#define	MCP23XXX_INT_ERR   255
	Interrupt error.