#ifndef _KITELIB_SX1272_H
#define _KITELIB_SX1272_H

#include "TypeDef.h"
#include "Module.h"
#include "SX127x.h"

// SX1272 specific register map
#define SX1272_REG_AGC_REF                            0x43
#define SX1272_REG_AGC_THRESH_1                       0x44
#define SX1272_REG_AGC_THRESH_2                       0x45
#define SX1272_REG_AGC_THRESH_3                       0x46
#define SX1272_REG_PLL_HOP                            0x4B
#define SX1272_REG_TCXO                               0x58
#define SX1272_REG_PA_DAC                             0x5A
#define SX1272_REG_PLL                                0x5C
#define SX1272_REG_PLL_LOW_PN                         0x5E
#define SX1272_REG_FORMER_TEMP                        0x6C
#define SX1272_REG_BIT_RATE_FRAC                      0x70

// SX1272 LoRa modem settings
// SX1272_REG_FRF_MSB + REG_FRF_MID + REG_FRF_LSB
#define SX1272_FRF_MSB                                0xE4        //  7     0     carrier frequency setting: f_RF = (F(XOSC) * FRF)/2^19
#define SX1272_FRF_MID                                0xC0        //  7     0         where F(XOSC) = 32 MHz
#define SX1272_FRF_LSB                                0x00        //  7     0               FRF = 3 byte value of FRF registers

// SX1272_REG_MODEM_CONFIG_1
#define SX1272_BW_125_00_KHZ                          0b00000000  //  7     6     bandwidth:  125 kHz
#define SX1272_BW_250_00_KHZ                          0b01000000  //  7     6                 250 kHz
#define SX1272_BW_500_00_KHZ                          0b10000000  //  7     6                 500 kHz
#define SX1272_CR_4_5                                 0b00001000  //  5     3     error coding rate:  4/5
#define SX1272_CR_4_6                                 0b00010000  //  5     3                         4/6
#define SX1272_CR_4_7                                 0b00011000  //  5     3                         4/7
#define SX1272_CR_4_8                                 0b00100000  //  5     3                         4/8
#define SX1272_HEADER_EXPL_MODE                       0b00000000  //  2     2     explicit header mode
#define SX1272_HEADER_IMPL_MODE                       0b00000100  //  2     2     implicit header mode
#define SX1272_RX_CRC_MODE_OFF                        0b00000000  //  1     1     CRC disabled
#define SX1272_RX_CRC_MODE_ON                         0b00000010  //  1     1     CRC enabled
#define SX1272_LOW_DATA_RATE_OPT_OFF                  0b00000000  //  0     0     low data rate optimization disabled
#define SX1272_LOW_DATA_RATE_OPT_ON                   0b00000001  //  0     0     low data rate optimization enabled, mandatory for SF 11 and 12 with BW 125 kHz

// SX1272_REG_MODEM_CONFIG_2
#define SX1272_AGC_AUTO_OFF                           0b00000000  //  2     2     LNA gain set by REG_LNA
#define SX1272_AGC_AUTO_ON                            0b00000100  //  2     2     LNA gain set by internal AGC loop

// SX127X_REG_VERSION
#define SX1272_CHIP_VERSION                           0x22

// SX1272 FSK modem settings
// SX127X_REG_OP_MODE
#define SX1272_NO_SHAPING                             0b00000000  //  4     3     data shaping: no shaping (default)
#define SX1272_FSK_GAUSSIAN_1_0                       0b00001000  //  4     3                   FSK modulation Gaussian filter, BT = 1.0
#define SX1272_FSK_GAUSSIAN_0_5                       0b00010000  //  4     3                   FSK modulation Gaussian filter, BT = 0.5
#define SX1272_FSK_GAUSSIAN_0_3                       0b00011000  //  4     3                   FSK modulation Gaussian filter, BT = 0.3
#define SX1272_OOK_FILTER_BR                          0b00001000  //  4     3                   OOK modulation filter, f_cutoff = BR
#define SX1272_OOK_FILTER_2BR                         0b00010000  //  4     3                   OOK modulation filter, f_cutoff = 2*BR

// SX127X_REG_PA_RAMP
#define SX1272_LOW_PN_TX_PLL_OFF                      0b00010000  //  4     4     use standard PLL in transmit mode (default)
#define SX1272_LOW_PN_TX_PLL_ON                       0b00000000  //  4     4     use lower phase noise PLL in transmit mode

// SX127X_REG_SYNC_CONFIG
#define SX1272_FIFO_FILL_CONDITION_SYNC_ADDRESS       0b00000000  //  3     3     FIFO will be filled when sync address interrupt occurs (default)
#define SX1272_FIFO_FILL_CONDITION_ALWAYS             0b00001000  //  3     3     FIFO will be filled as long as this bit is set

// SX1272_REG_AGC_REF
#define SX1272_AGC_REFERENCE_LEVEL                    0x13        //  5     0     floor reference for AGC thresholds: AgcRef = -174 + 10*log(2*RxBw) + 8 + AGC_REFERENCE_LEVEL [dBm]

// SX1272_REG_AGC_THRESH_1
#define SX1272_AGC_STEP_1                             0x0E        //  4     0     1st AGC threshold

// SX1272_REG_AGC_THRESH_2
#define SX1272_AGC_STEP_2                             0x50        //  7     4     2nd AGC threshold
#define SX1272_AGC_STEP_3                             0x0B        //  4     0     3rd AGC threshold

// SX1272_REG_AGC_THRESH_3
#define SX1272_AGC_STEP_4                             0xD0        //  7     4     4th AGC threshold
#define SX1272_AGC_STEP_5                             0x0B        //  4     0     5th AGC threshold

// SX1272_REG_PLL_LOW_PN
#define SX1272_PLL_LOW_PN_BANDWIDTH_75_KHZ            0b00000000  //  7     6     low phase noise PLL bandwidth: 75 kHz
#define SX1272_PLL_LOW_PN_BANDWIDTH_150_KHZ           0b01000000  //  7     6                                    150 kHz
#define SX1272_PLL_LOW_PN_BANDWIDTH_225_KHZ           0b10000000  //  7     6                                    225 kHz
#define SX1272_PLL_LOW_PN_BANDWIDTH_300_KHZ           0b11000000  //  7     6                                    300 kHz (default)

class SX1272: public SX127x {
  public:
    // constructor
    SX1272(Module* mod);
    
    // basic methods
    int16_t begin(float freq = 915.0, float bw = 125.0, uint8_t sf = 9, uint8_t cr = 7, uint8_t syncWord = SX127X_SYNC_WORD, int8_t power = 17, uint8_t currentLimit = 100, uint16_t preambleLength = 8, uint8_t gain = 0);
    int16_t beginFSK(float freq = 434.0, float br = 48.0, float rxBw = 125.0, float freqDev = 50.0, int8_t power = 13, uint8_t currentLimit = 100);
    
    // configuration methods
    int16_t setFrequency(float freq);
    int16_t setBandwidth(float bw);
    int16_t setSpreadingFactor(uint8_t sf);
    int16_t setCodingRate(uint8_t cr);
    int16_t setOutputPower(int8_t power);
    int16_t setGain(uint8_t gain);
  
  protected:
    int16_t setBandwidthRaw(uint8_t newBandwidth);
    int16_t setSpreadingFactorRaw(uint8_t newSpreadingFactor);
    int16_t setCodingRateRaw(uint8_t newCodingRate);
    
    int16_t config();
    int16_t configFSK();

  private:
    
};

#endif