#define LTR_I2C_ADDR (0x29 << 1)

#define LTR_REG_ALS_CONTR         0x80
#define LTR_REG_PS_CONTR          0x81
#define LTR_REG_PS_LED            0x82
#define LTR_REG_PS_N_PULSES       0x83
#define LTR_REG_PS_MEAS_RATE      0x84
#define LTR_REG_MEAS_RATE         0x85
#define LTR_REG_PART_ID           0x86
#define LTR_REG_MANUFAC_ID        0x87
#define LTR_REG_CH1_0             0x88
#define LTR_REG_CH1_1             0x89
#define LTR_REG_CH0_0             0x8A
#define LTR_REG_CH0_1             0x8B
#define LTR_REG_STATUS            0x8C
#define LTR_REG_PS_DATA_0         0x8D
#define LTR_REG_PS_DATA_1         0x8E
#define LTR_REG_INTERRUPT         0x8F
#define LTR_REG_PS_THRES_UP_0     0x90
#define LTR_REG_PS_THRES_UP_1     0x91
#define LTR_REG_PS_THRES_LOW_0    0x92
#define LTR_REG_PS_THRES_LOW_1    0x93
#define LTR_REG_ALS_THRES_UP_0    0x97
#define LTR_REG_ALS_THRES_UP_1    0x98
#define LTR_REG_ALS_THRES_LOW_0   0x99
#define LTR_REG_ALS_THRES_LOW_1   0x9A
#define LTR_REG_INTERRUPT_PERSIST 0x9E
