DOneWire.h

#ifndef __DONEWIRE_H__
#define __DONEWIRE_H__

#include <inttypes.h>
#include <OneWire.h>

// Chose between a table based CRC (flash expensive, fast)
// or a computed CRC (smaller, slow)
#define DONEWIRE_CRC8_TABLE 1

#define DS2482_COMMAND_RESET 0xF0 // Device reset

#define DS2482_COMMAND_SRP 0xE1 // Set read pointer
#define DS2482_POINTER_STATUS 0xF0
#define DS2482_STATUS_BUSY (1 << 0)
#define DS2482_STATUS_PPD (1 << 1)
#define DS2482_STATUS_SD (1 << 2)
#define DS2482_STATUS_LL (1 << 3)
#define DS2482_STATUS_RST (1 << 4)
#define DS2482_STATUS_SBR (1 << 5)
#define DS2482_STATUS_TSB (1 << 6)
#define DS2482_STATUS_DIR (1 << 7)
#define DS2482_POINTER_DATA 0xE1
#define DS2482_POINTER_CONFIG 0xC3
#define DS2482_CONFIG_APU (1 << 0)
#define DS2482_CONFIG_SPU (1 << 2)
#define DS2482_CONFIG_1WS (1 << 3)

#define DS2482_COMMAND_WRITECONFIG 0xD2
#define DS2482_COMMAND_RESETWIRE 0xB4
#define DS2482_COMMAND_WRITEBYTE 0xA5
#define DS2482_COMMAND_READBYTE 0x96
#define DS2482_COMMAND_SINGLEBIT 0x87
#define DS2482_COMMAND_TRIPLET 0x78

#define WIRE_COMMAND_SKIP 0xCC
#define WIRE_COMMAND_SELECT 0x55
#define WIRE_COMMAND_SEARCH 0xF0

#define DS2482_ERROR_TIMEOUT (1 << 0)
#define DS2482_ERROR_SHORT (1 << 1)
#define DS2482_ERROR_CONFIG (1 << 2)

class DOneWire : public OneWire
{
public:
	DOneWire();
	DOneWire(uint8_t address);
	DOneWire(uint8_t sdaPin, uint8_t sclPin);
	DOneWire(uint8_t sdaPin, uint8_t sclPin, uint8_t address);

	uint8_t getAddress();
	uint8_t getError();
	uint8_t checkPresence();

	void deviceReset();
	void setReadPointer(uint8_t readPointer);
	uint8_t readStatus();
	uint8_t readData();
	uint8_t waitOnBusy();
	uint8_t readConfig();
	void writeConfig(uint8_t config);
	void setStrongPullup();
	void clearStrongPullup();
	uint8_t wireReset();
	void wireWriteByte(uint8_t data, uint8_t power = 0);
	uint8_t wireReadByte();
	void wireWriteBit(uint8_t data, uint8_t power = 0);
	uint8_t wireReadBit();
	void wireSkip();
	void wireSelect(const uint8_t rom[8]);
	void wireResetSearch();
	uint8_t wireSearch(uint8_t *address);

	// emulation of original DOneWire library
	void reset_search();
	uint8_t search(uint8_t *newAddr);
	static uint8_t crc8(const uint8_t *addr, uint8_t len);
	uint8_t reset(void);
	void select(const uint8_t rom[8]);
	void skip(void);
	void write(uint8_t v, uint8_t power = 0);
	uint8_t read(void);
	uint8_t read_bit(void);
	void write_bit(uint8_t v);

	// Brought selectChannel from Paeaetech's DS2482 lib
	// https://github.com/paeaetech/paeae/tree/master/Libraries/ds2482
	bool selectChannel(uint8_t channel);

private:
	void begin();
	uint8_t end();
	void writeByte(uint8_t);
	uint8_t readByte();

	uint8_t mAddress;
	uint8_t mError;

	uint8_t searchAddress[8];
	int8_t searchLastDiscrepancy;
	uint8_t searchLastDeviceFlag;
};

#endif