#ifndef _ads1210_h_
#define _ads1210_h_


#include <stdint.h>





class ADS1210 {
public:
	ADS1210()  {};
	void begin(uint8_t csPin, uint8_t drdyPin, bool initializeConfig, int eepromAddr);
	void exec();

  float getCalFactor() const { return m_calFactor; };
  float getCalOffset() const { return m_calOffset; };
  void setCalFactor(float calFactor);
  void setCalOffset(float calOffset);

  uint32_t getValue() const { return m_value; };
  float getU() const { return m_u; };
  float getRRaw() const { return m_rRaw; };
  float getR() const { return m_r; };
private:
	// register addresses
	const uint8_t ADDR_DOR2 = 0x00;
	const uint8_t ADDR_DOR1 = 0x01;
	const uint8_t ADDR_DOR0 = 0x02;

	const uint8_t ADDR_CMR3 = 0x04;
	const uint8_t ADDR_CMR2 = 0x05;
	const uint8_t ADDR_CMR1 = 0x06;
	const uint8_t ADDR_CMR0 = 0x07;

	const uint8_t ADDR_OCR2 = 0x08;
	const uint8_t ADDR_OCR1 = 0x09;
	const uint8_t ADDR_OCR0 = 0x0a;

	const uint8_t ADDR_FCR2 = 0x0c;
	const uint8_t ADDR_FCR1 = 0x0d;
	const uint8_t ADDR_FCR0 = 0x0e;

	// bit values
	// CMR
	const uint8_t CMR_BIAS = 0x80;
	const uint8_t CMR_REFO = 0x40;
	const uint8_t CMR_DF = 0x20;
	const uint8_t CMR_UB = 0x10;
	const uint8_t CMR_BD = 0x08;
	const uint8_t CMR_MSB = 0x04;
	const uint8_t CMR_SDL = 0x02;
	const uint8_t CMR_DRDY = 0x01;
	
	const uint8_t CMR_MD_Mask = 0xe0;
	const uint8_t CMR_MD_NormalMode = 0x00;
	const uint8_t CMR_MD_SelfCalibration = 0x20;
	const uint8_t CMR_MD_SystemOffsetCalibration = 0x40;
	const uint8_t CMR_MD_SystemFullScaleCalibration = 0x60;
	const uint8_t CMR_MD_PseudoSystemCalibration = 0x80;
	const uint8_t CMD_MD_BackgroundCalibration = 0xa0;
	const uint8_t CMD_MD_Sleep = 0xc0;
	
	const uint8_t CMR_Gain_Mask = (0x07 << 2);
	const uint8_t CMR_Gain_1 = 0;
	const uint8_t CMR_Gain_2 = (0x01 << 2);
	const uint8_t CMR_Gain_4 = (0x02 << 2);
	const uint8_t CMR_Gain_8 = (0x03 << 2);
	const uint8_t CMR_Gain_16 = (0x04 << 2);

	// bit values
	// INSR
	const uint8_t INSR_RW = 0x80;
	const uint8_t INSR_MB1 = 0x40;
	const uint8_t INSR_MB0 = 0x20;
	const uint8_t INSR_ADDR = 0x0f;
	
	const float U_REF = 2.5;
	const uint32_t V_MAX = 0x3FFFFF;
	const float R_REF = 3000.0;
	
	const uint8_t SKIPPED_BITS = 4;

	uint8_t m_csPin;
	uint8_t m_drdyPin;
	int m_eepromAddr;
	
	float m_calFactor;
  float m_calOffset;
  
  uint32_t m_value;
	float m_u;
	float m_rRaw;
	float m_r;

	void enableCS() const;
	void disableCS() const;
	void writeRegister(const uint8_t regAddr, const uint8_t value) const;
	uint8_t readRegister(const uint8_t regAddr) const;
	void waitForDRdy() const;
	void setMode(uint8_t mode) const;
	void setGain(uint8_t gain) const;
};


#endif // _ads1210_h_