Adafruit_BusIO_Register.h

#ifndef Adafruit_BusIO_Register_h
#define Adafruit_BusIO_Register_h
 
#include <Arduino.h>
 
#if !defined(SPI_INTERFACES_COUNT) ||                                          \
    (defined(SPI_INTERFACES_COUNT) && (SPI_INTERFACES_COUNT > 0))
 
#include "Adafruit_I2CDevice.h"
#include "Adafruit_SPIDevice.h"
 
typedef enum _Adafruit_BusIO_SPIRegType {
  ADDRBIT8_HIGH_TOREAD = 0,
  AD8_HIGH_TOREAD_AD7_HIGH_TOINC = 1,

  ADDRBIT8_HIGH_TOWRITE = 2,

  ADDRESSED_OPCODE_BIT0_LOW_TO_WRITE = 3,
 
} Adafruit_BusIO_SPIRegType;

class Adafruit_BusIO_Register {
public:
  Adafruit_BusIO_Register(Adafruit_I2CDevice *i2cdevice, uint16_t reg_addr,
                          uint8_t width = 1, uint8_t byteorder = LSBFIRST,
                          uint8_t address_width = 1);
 
  Adafruit_BusIO_Register(Adafruit_SPIDevice *spidevice, uint16_t reg_addr,
                          Adafruit_BusIO_SPIRegType type, uint8_t width = 1,
                          uint8_t byteorder = LSBFIRST,
                          uint8_t address_width = 1);
 
  Adafruit_BusIO_Register(Adafruit_I2CDevice *i2cdevice,
                          Adafruit_SPIDevice *spidevice,
                          Adafruit_BusIO_SPIRegType type, uint16_t reg_addr,
                          uint8_t width = 1, uint8_t byteorder = LSBFIRST,
                          uint8_t address_width = 1);
 
  bool read(uint8_t *buffer, uint8_t len);
  bool read(uint8_t *value);
  bool read(uint16_t *value);
  uint32_t read(void);
  uint32_t readCached(void);
  bool write(uint8_t *buffer, uint8_t len);
  bool write(uint32_t value, uint8_t numbytes = 0);
 
  uint8_t width(void);
 
  void setWidth(uint8_t width);
  void setAddress(uint16_t address);
  void setAddressWidth(uint16_t address_width);
 
  void print(Stream *s = &Serial);
  void println(Stream *s = &Serial);
 
private:
  Adafruit_I2CDevice *_i2cdevice;
  Adafruit_SPIDevice *_spidevice;
  Adafruit_BusIO_SPIRegType _spiregtype;
  uint16_t _address;
  uint8_t _width, _addrwidth, _byteorder;
  uint8_t _buffer[4]; // we won't support anything larger than uint32 for
                      // non-buffered read
  uint32_t _cached = 0;
};

class Adafruit_BusIO_RegisterBits {
public:
  Adafruit_BusIO_RegisterBits(Adafruit_BusIO_Register *reg, uint8_t bits,
                              uint8_t shift);
  bool write(uint32_t value);
  uint32_t read(void);
 
private:
  Adafruit_BusIO_Register *_register;
  uint8_t _bits, _shift;
};
 
#endif // SPI exists
#endif // BusIO_Register_h