#ifndef __LTC2942_H
#define __LTC2942_H


// LTC2942 HAL
#define LTC2942_I2C_PORT                I2C1 // I2C port where the LTC2942 connected

// LTC2942 address
#define LTC2942_ADDR                    (0x64 << 1)


// LTC2942 register definitions
#define LTC2942_REG_STATUS              (uint8_t)0x00 // (A) Status
#define LTC2942_REG_CONTROL             (uint8_t)0x01 // (B) Control
#define LTC2942_REG_AC_H                (uint8_t)0x02 // (C) Accumulated charge MSB
#define LTC2942_REG_AC_L                (uint8_t)0x03 // (D) Accumulated charge LSB
#define LTC2942_REG_CTH_H               (uint8_t)0x04 // (E) Charge threshold high MSB
#define LTC2942_REG_CTH_L               (uint8_t)0x05 // (F) Charge threshold high LSB
#define LTC2942_REG_CTL_H               (uint8_t)0x06 // (G) Charge threshold low MSB
#define LTC2942_REG_CTL_L               (uint8_t)0x07 // (H) Charge threshold low LSB
#define LTC2942_REG_VOL_H               (uint8_t)0x08 // (I) Voltage MSB
#define LTC2942_REG_VOL_L               (uint8_t)0x09 // (J) Voltage LSB
#define LTC2942_REG_VOLT_H              (uint8_t)0x0A // (K) Voltage threshold high
#define LTC2942_REG_VOLT_L              (uint8_t)0x0B // (L) Voltage threshold low
#define LTC2942_REG_TEMP_H              (uint8_t)0x0C // (M) Temperature MSB
#define LTC2942_REG_TEMP_L              (uint8_t)0x0D // (N) Temperature LSB
#define LTC2942_REG_TEMPT_H             (uint8_t)0x0E // (O) Temperature threshold high
#define LTC2942_REG_TEMPT_L             (uint8_t)0x0F // (P) Temperature threshold low

// LTC2942 status register bit definitions
#define LTC2942_STATUS_CHIPID           (uint8_t)0x80 // A[7] Chip identification (0: LTC2942-1, 0: LTC2941-1)
#define LTC2942_STATUS_AC_OVR           (uint8_t)0x20 // A[5] Accumulated charge overflow/underflow
#define LTC2942_STATUS_TEMP_ALRT        (uint8_t)0x10 // A[4] Temperature alert
#define LTC2942_STATUS_CHG_ALRT_H       (uint8_t)0x08 // A[3] Charge alert high
#define LTC2942_STATUS_CHG_ALRT_L       (uint8_t)0x04 // A[2] Charge alert low
#define LTC2942_STATUS_VOL_ALRT         (uint8_t)0x02 // A[1] Voltage alert
#define LTC2942_STATUS_UVLO_ALRT        (uint8_t)0x01 // A[0] Undervoltage lockout alert

// LTC2942 control register bit definitions
#define LTC2942_CTL_ADC_MSK             (uint8_t)0x3F // ADC mode bits [7:6]
#define LTC2942_CTL_PSCM_MSK            (uint8_t)0xC7 // Prescaler M bits [5:3]
#define LTC2942_CTL_ALCC_MSK            (uint8_t)0xF9 // AL/CC pin control [2:1]
#define LTC2942_CTL_SHUTDOWN            (uint8_t)0x01 // B[0] Shutdown


// LTC2942 ADC mode enumeration
enum {
	LTC2942_ADC_AUTO   = (uint8_t)0xC0, // Automatic mode
	LTC2942_ADC_M_VOL  = (uint8_t)0x80, // Manual voltage mode
	LTC2942_ADC_M_TEMP = (uint8_t)0x40, // Manual temperature mode
	LTC2942_ADC_SLEEP  = (uint8_t)0x00  // Sleep
};

// LTC2942 prescaler M enumeration
enum {
	LTC2942_PSCM_1   = (uint8_t)0x00,
	LTC2942_PSCM_2   = (uint8_t)0x08,
	LTC2942_PSCM_4   = (uint8_t)0x10,
	LTC2942_PSCM_8   = (uint8_t)0x18,
	LTC2942_PSCM_16  = (uint8_t)0x20,
	LTC2942_PSCM_32  = (uint8_t)0x28,
	LTC2942_PSCM_64  = (uint8_t)0x30,
	LTC2942_PSCM_128 = (uint8_t)0x38
};

// LTC2942 AL/CC pin mode enumeration
enum {
	LTC2942_ALCC_DISABLED = (uint8_t)0x00, // AL/CC pin disabled
	LTC2942_ALCC_CHG      = (uint8_t)0x02, // Charge complete mode
	LTC2942_ALCC_ALERT    = (uint8_t)0x04  // Alert mode
};

// State of analog section enumeration
enum {
	LTC2942_AN_DISABLED = (uint8_t)0x00,
	LTC2942_AN_ENABLED  = !LTC2942_AN_DISABLED
};


// Function prototypes
inline uint8_t LTC2942_GetStatus(void);
inline uint8_t LTC2942_GetControl(void);
uint32_t LTC2942_GetVoltage(void);
int32_t LTC2942_GetTemperature(void);
uint16_t LTC2942_GetAC(void);

void LTC2942_SetAC(uint16_t AC);
void LTC2942_SetADCMode(uint8_t mode);
void LTC2942_SetPrescaler(uint8_t psc);
void LTC2942_SetALCCMode(uint8_t mode);
void LTC2942_SetAnalog(uint8_t state);
inline void LTC2942_SetChargeThresholdH(uint16_t level);
inline void LTC2942_SetChargeThresholdL(uint16_t level);
inline void LTC2942_SetVoltageThresholdH(uint8_t level);
inline void LTC2942_SetVoltageThresholdL(uint8_t level);
inline void LTC2942_SetTemperatureThresholdH(uint8_t level);
inline void LTC2942_SetTemperatureThresholdL(uint8_t level);

#endif // __LTC2942_H