# "DG8SAQ specific values"
SI570_I2C_ADDR              = 0x55
SI570_DCO_HIGH              = 5670.0
SI570_DCO_LOW               = 4850.0
SI570_NOMINAL_XTALL_FREQ    = 114.285
SI570_XTALL_DEVIATION_PPM   = 2000
SI570_DEFAULT_STARTUP_FREQ  = 56.32

REQUEST_READ_VERSION        =  0x00
REQUEST_SET_DDRB            =  0x01
REQUEST_SET_PORTB           =  0x04
REQUEST_READ_EEPROM         =  0x11
REQUEST_FILTERS             =  0x17
REQUEST_SET_BPF_ADDRESS     =  0x18
REQUEST_READ_BPF_ADDRESS    =  0x19
REQUEST_SET_LPF_ADDRESS     =  0x1A
REQUEST_READ_LPF_ADDRESS    =  0x1B
REQUEST_SET_FREQ            =  0x30
REQUEST_SET_MULTIPLY_LO     =  0x31
REQUEST_SET_FREQ_BY_VALUE   =  0x32
REQUEST_SET_XTALL_FREQ      =  0x33
REQUEST_SET_STARTUP_FREQ    =  0x34
REQUEST_READ_MULTIPLY_LO    =  0x39 
REQUEST_READ_FREQUENCY      =  0x3A
REQUEST_READ_SMOOTH_TUNE_PPM=  0x3B
REQUEST_READ_STARTUP        =  0x3C
REQUEST_READ_XTALL          =  0x3D
REQUEST_READ_REGISTERS      =  0x3F
#REQUEST_SET_SI570_ADDR      =  0x41
REQUEST_SET_PTT             =  0x50
REQUEST_READ_KEYS           =  0x51

HS_DIV_MAP = [4, 5, 6, 7, -1, 9, -1, 11]