private void ResetSx127x(RadioTypeSx127x radio_type)
{
switch (radio_type)
{
case RadioTypeSx127x.LGW_RADIO_TYPE_SX1276:
this.FpgaRegisterWrite(Registers.FPGA_CTRL_RADIO_RESET, 0);
this.FpgaRegisterWrite(Registers.FPGA_CTRL_RADIO_RESET, 1);
break;
case RadioTypeSx127x.LGW_RADIO_TYPE_SX1272:
this.FpgaRegisterWrite(Registers.FPGA_CTRL_RADIO_RESET, 1);
this.FpgaRegisterWrite(Registers.FPGA_CTRL_RADIO_RESET, 0);
break;
default:
throw new Exception("ERROR: Failed to reset sx127x, not supported (" + radio_type + ")");
}
}
private void SetupSx127x(UInt32 frequency, Byte modulation, Sx127xRxbwE rxbw_khz, SByte rssi_offset)
{
RadioTypeSx127x radio_type = RadioTypeSx127x.LGW_RADIO_TYPE_NONE;
RadioTypeVersion[] supported_radio_type = new RadioTypeVersion[2] {
new RadioTypeVersion(RadioTypeSx127x.LGW_RADIO_TYPE_SX1272, 0x22),
new RadioTypeVersion(RadioTypeSx127x.LGW_RADIO_TYPE_SX1276, 0x12)
};
// Check parameters
if (modulation != 0x20) //MOD_FSK
{
throw new Exception("ERROR: modulation not supported for SX127x (" + modulation + ")");
}
if (rxbw_khz > Sx127xRxbwE.LGW_SX127X_RXBW_250K_HZ)
{
throw new Exception("ERROR: RX bandwidth not supported for SX127x (" + rxbw_khz + ")");
}
// Probing radio type
for (Int32 i = 0; i < supported_radio_type.Length; i++)
{
// Reset the radio
this.ResetSx127x(supported_radio_type[i].Type);
// Read version register
Byte version = this.Sx127xRead(0x42);
// Check if we got the expected version
if (version != supported_radio_type[i].Version)
{
Helper.WriteError("INFO: sx127x version register - read: " + version + ", expected: " + supported_radio_type[i].Version);
continue;
}
else
{
Console.WriteLine("INFO: sx127x radio has been found (type: " + supported_radio_type[i].Type + ", version: " + version + ")");
radio_type = supported_radio_type[i].Type;
break;
}
}
if (radio_type == RadioTypeSx127x.LGW_RADIO_TYPE_NONE)
{
throw new Exception("ERROR: sx127x radio has not been found\n");
}
// Setup the radio
switch (modulation)
{
case 0x20: //MOD_FSK:
if (radio_type == RadioTypeSx127x.LGW_RADIO_TYPE_SX1272)
{
this.SetupSx1272Fsk(frequency, (Int32)rxbw_khz, rssi_offset);
}
else
{
this.SetupSx1276Fsk(frequency, (Int32)rxbw_khz, rssi_offset);
}
break;
default:
// Should not happen
break;
}
}
public RadioTypeVersion(RadioTypeSx127x t, Byte r)
{
this.Type = t;
this.Version = r;
}
