Register Dump
Next step was to dump all registers (0x00 thru 0x42) of the SX1276/7/8/9 device.
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// Copyright (c) March 2020, devMobile Software
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namespace devMobile.IoT.Rfm9x.RegisterScan
{
using System;
using System.Diagnostics;
using System.Threading;
using GHIElectronics.TinyCLR.Devices.Spi;
using GHIElectronics.TinyCLR.Pins;
public sealed class Rfm9XDevice
{
private SpiDevice rfm9XLoraModem;
public Rfm9XDevice(int chipSelectPin)
{
var settings = new SpiConnectionSettings()
{
ChipSelectType = SpiChipSelectType.Gpio,
ChipSelectLine = chipSelectPin,
Mode = SpiMode.Mode0,
ClockFrequency = 500000,
DataBitLength = 8,
ChipSelectActiveState = false,
};
SpiController spiCntroller = SpiController.FromName(FEZ.SpiBus.Spi1);
rfm9XLoraModem = spiCntroller.GetDevice(settings);
}
public Byte RegisterReadByte(byte registerAddress)
{
byte[] writeBuffer = new byte[] { registerAddress, 0x0 };
byte[] readBuffer = new byte[writeBuffer.Length];
Debug.Assert(rfm9XLoraModem != null);
rfm9XLoraModem.TransferFullDuplex(writeBuffer, readBuffer);
return readBuffer[1];
}
}
class Program
{
static void Main()
{
Rfm9XDevice rfm9XDevice = new Rfm9XDevice(FEZ.GpioPin.D10);
while (true)
{
for (byte registerIndex = 0; registerIndex <= 0x42; registerIndex++)
{
byte registerValue = rfm9XDevice.RegisterReadByte(registerIndex);
Debug.WriteLine($"Register 0x{registerIndex:x2} - Value 0X{registerValue:x2}");
}
Debug.WriteLine("");
Thread.Sleep(10000);
}
}
}
}
The output of the application looked like this
Found debugger! Create TS. Loading Deployment Assemblies. Attaching deployed file. Assembly: mscorlib (1.0.0.0) Attaching deployed file. Assembly: GHIElectronics.TinyCLR.Devices.Spi (1.0.0.0) Attaching deployed file. Assembly: GHIElectronics.TinyCLR.Devices.Gpio (1.0.0.0) Attaching deployed file. Assembly: GHIElectronics.TinyCLR.Native (1.0.0.0) Attaching deployed file. Assembly: RegisterScan (1.0.0.0) Resolving. The debugging target runtime is loading the application assemblies and starting execution. Ready. 'GHIElectronics.TinyCLR.VisualStudio.ProjectSystem.dll' (Managed): Loaded 'C:\Users\BrynLewis\source\repos\RFM9X.TinyCLR\RegisterScan\bin\Debug\pe\..\GHIElectronics.TinyCLR.Native.dll' 'GHIElectronics.TinyCLR.VisualStudio.ProjectSystem.dll' (Managed): Loaded 'C:\Users\BrynLewis\source\repos\RFM9X.TinyCLR\RegisterScan\bin\Debug\pe\..\GHIElectronics.TinyCLR.Devices.Gpio.dll' 'GHIElectronics.TinyCLR.VisualStudio.ProjectSystem.dll' (Managed): Loaded 'C:\Users\BrynLewis\source\repos\RFM9X.TinyCLR\RegisterScan\bin\Debug\pe\..\GHIElectronics.TinyCLR.Devices.Spi.dll' 'GHIElectronics.TinyCLR.VisualStudio.ProjectSystem.dll' (Managed): Loaded 'C:\Users\BrynLewis\source\repos\RFM9X.TinyCLR\RegisterScan\bin\Debug\pe\..\RegisterScan.exe', Symbols loaded. The thread '<No Name>' (0x2) has exited with code 0 (0x0). Register 0x00 - Value 0X00 Register 0x01 - Value 0X09 Register 0x02 - Value 0X1a Register 0x03 - Value 0X0b Register 0x04 - Value 0X00 Register 0x05 - Value 0X52 Register 0x06 - Value 0X6c Register 0x07 - Value 0X80 Register 0x08 - Value 0X00 Register 0x09 - Value 0X4f Register 0x0a - Value 0X09 Register 0x0b - Value 0X2b Register 0x0c - Value 0X20 Register 0x0d - Value 0X08 Register 0x0e - Value 0X02 Register 0x0f - Value 0X0a Register 0x10 - Value 0Xff Register 0x11 - Value 0X70 Register 0x12 - Value 0X15 Register 0x13 - Value 0X0b Register 0x14 - Value 0X28 Register 0x15 - Value 0X0c Register 0x16 - Value 0X12 Register 0x17 - Value 0X47 Register 0x18 - Value 0X32 Register 0x19 - Value 0X3e Register 0x1a - Value 0X00 Register 0x1b - Value 0X00 Register 0x1c - Value 0X00 Register 0x1d - Value 0X00 Register 0x1e - Value 0X00 Register 0x1f - Value 0X40 Register 0x21 - Value 0X00 Register 0x22 - Value 0X00 Register 0x23 - Value 0X00 Register 0x24 - Value 0X05 Register 0x25 - Value 0X00 Register 0x26 - Value 0X03 Register 0x27 - Value 0X93 Register 0x28 - Value 0X55 Register 0x29 - Value 0X55 Register 0x2a - Value 0X55 Register 0x2b - Value 0X55 Register 0x2c - Value 0X55 Register 0x2d - Value 0X55 Register 0x2e - Value 0X55 Register 0x2f - Value 0X55 Register 0x30 - Value 0X90 Register 0x31 - Value 0X40 Register 0x32 - Value 0X40 Register 0x33 - Value 0X00 Register 0x34 - Value 0X00 Register 0x35 - Value 0X0f Register 0x36 - Value 0X00 Register 0x37 - Value 0X00 Register 0x38 - Value 0X00 Register 0x39 - Value 0Xf5 Register 0x3a - Value 0X20 Register 0x3b - Value 0X82 Register 0x3c - Value 0Xf7 Register 0x3d - Value 0X02 Register 0x3e - Value 0X80 Register 0x3f - Value 0X40 Register 0x40 - Value 0X00 Register 0x41 - Value 0X00 Register 0x42 - Value 0X12
The device was not in LoRa mode (Bit 7 of RegOpMode 0x01) so the next step was to read and write registers so I could change its configuration.
Overall the SPI implementation was closer to Windows 10 IoT Core model than expected.
