/// <summary>
/// Create an SPI FT4222 class
/// </summary>
/// <param name="settings">SPI Connection Settings</param>
public Ft4222Spi(SpiConnectionSettings settings)
{
_settings = settings;
// Check device
var devInfos = FtCommon.GetDevices();
if (devInfos.Count == 0)
{
throw new IOException("No FTDI device available");
}
// Select the one from bus Id
// FT4222 propose depending on the mode multiple interfaces. Only the A is available for SPI or where there is none as it's the only interface
var devInfo = devInfos.Where(m => m.Description == "FT4222 A" || m.Description == "FT4222").ToArray();
if ((devInfo.Length == 0) || (devInfo.Length < _settings.BusId))
{
throw new IOException($"Can't find a device to open SPI on index {_settings.BusId}");
}
DeviceInformation = devInfo[_settings.BusId];
// Open device
var ftStatus = FtFunction.FT_OpenEx(DeviceInformation.LocId, FtOpenType.OpenByLocation, out _ftHandle);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Failed to open device {DeviceInformation.Description} with error: {ftStatus}");
}
// Set the clock but we need some math
var(ft4222Clock, tfSpiDiv) = CalculateBestClockRate();
ftStatus = FtFunction.FT4222_SetClock(_ftHandle, ft4222Clock);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Failed to set clock rate {ft4222Clock} on device: {DeviceInformation.Description}with error: {ftStatus}");
}
SpiClockPolarity pol = SpiClockPolarity.ClockIdleLow;
if ((_settings.Mode == SpiMode.Mode2) || (_settings.Mode == SpiMode.Mode3))
{
pol = SpiClockPolarity.ClockIdelHigh;
}
SpiClockPhase pha = SpiClockPhase.ClockLeading;
if ((_settings.Mode == SpiMode.Mode1) || (_settings.Mode == SpiMode.Mode3))
{
pha = SpiClockPhase.ClockTailing;
}
// Configure the SPI
ftStatus = FtFunction.FT4222_SPIMaster_Init(_ftHandle, SpiOperatingMode.Single, tfSpiDiv, pol, pha,
(byte)_settings.ChipSelectLine);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Failed setup SPI on device: {DeviceInformation.Description} with error: {ftStatus}");
}
}
/// <summary>
/// Instantiates a DeviceInformation object.
/// </summary>
/// <param name="flags">Indicates device state.</param>
/// <param name="type">Indicates the device type.</param>
/// <param name="id">The Vendor ID and Product ID of the device.</param>
/// <param name="locId">The physical location identifier of the device.</param>
/// <param name="serialNumber">The device serial number.</param>
/// <param name="description">The device description.</param>
public DeviceInformation(FtFlag flags, FtDevice type, uint id, uint locId, string serialNumber, string description)
{
Flags = flags;
Type = type;
Id = id;
LocId = locId;
SerialNumber = serialNumber;
Description = description;
}
/// <summary>
/// Create a FT4222 GPIO driver
/// </summary>
/// <param name="deviceNumber">Number of the device in the device list, default 0</param>
public Ft4222Gpio(int deviceNumber = 0)
{
// Check device
var devInfos = FtCommon.GetDevices();
if (devInfos.Count == 0)
{
throw new IOException("No FTDI device available");
}
// Select the deviceNumber, only the last one in Mode 0 and Mode 1 can be open.
// The last one is either B if in Mode 0 or D in mode 1.
string strMode = devInfos[0].Type == FtDeviceType.Ft4222HMode1or2With4Interfaces ? "FT4222 D" : "FT4222 B";
var devInfo = devInfos.Where(m => m.Description == strMode).ToArray();
if ((devInfo.Length == 0) || (devInfo.Length < deviceNumber))
{
throw new IOException($"Can't find a device to open GPIO on index {deviceNumber}");
}
DeviceInformation = devInfo[deviceNumber];
// Open device
var ftStatus = FtFunction.FT_OpenEx(DeviceInformation.LocId, FtOpenType.OpenByLocation, out _ftHandle);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Failed to open device {DeviceInformation.Description}, status: {ftStatus}");
}
ftStatus = FtFunction.FT4222_SetSuspendOut(_ftHandle, false);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Can't initialize GPIO for device {DeviceInformation.Description} changing Suspend out mode, status: {ftStatus}");
}
ftStatus = FtFunction.FT4222_SetWakeUpInterrupt(_ftHandle, false);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Can't initialize GPIO for device {DeviceInformation.Description} removing wake up interrupt, status: {ftStatus}");
}
for (int i = 0; i < PinCountConst; i++)
{
_gpioDirections[i] = GpioPinMode.Output;
}
ftStatus = FtFunction.FT4222_GPIO_Init(_ftHandle, _gpioDirections);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Can't initialize GPIO for device {DeviceInformation.Description}, status: {ftStatus}");
}
}
/// <summary>
/// Returns the list of FT4222 connected
/// </summary>
/// <returns>A list of devices connected</returns>
public static List <FtDevice> GetDevices()
{
List <FtDevice> devInfos = new List <FtDevice>();
FtStatus ftStatus = 0;
// Check device
uint numOfDevices;
ftStatus = FtFunction.FT_CreateDeviceInfoList(out numOfDevices);
Debug.WriteLine($"Number of devices: {numOfDevices}");
if (numOfDevices == 0)
{
throw new IOException($"No device found");
}
Span <byte> sernum = stackalloc byte[16];
Span <byte> desc = stackalloc byte[64];
for (uint i = 0; i < numOfDevices; i++)
{
uint flags = 0;
FtDeviceType ftDevice;
uint id;
uint locId;
IntPtr handle;
ftStatus = FtFunction.FT_GetDeviceInfoDetail(i, out flags, out ftDevice, out id, out locId,
in MemoryMarshal.GetReference(sernum), in MemoryMarshal.GetReference(desc), out handle);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Can't read device information on device index {i}, error {ftStatus}");
}
var devInfo = new FtDevice(
(FtFlag)flags,
ftDevice,
id,
locId,
Encoding.ASCII.GetString(sernum.ToArray(), 0, FindFirstZero(sernum)),
Encoding.ASCII.GetString(desc.ToArray(), 0, FindFirstZero(desc)));
devInfos.Add(devInfo);
}
return(devInfos);
}
/// <summary>
/// Create a FT4222 I2C Device
/// </summary>
/// <param name="deviceInformation">Device information. Use FtCommon.GetDevices to get it.</param>
public Ft4222I2cBus(FtDevice deviceInformation)
{
switch (deviceInformation.Type)
{
case FtDeviceType.Ft4222HMode0or2With2Interfaces:
case FtDeviceType.Ft4222HMode1or2With4Interfaces:
case FtDeviceType.Ft4222HMode3With1Interface:
break;
default: throw new ArgumentException($"Unknown device type: {deviceInformation.Type}");
}
DeviceInformation = deviceInformation;
// Open device
var ftStatus = FtFunction.FT_OpenEx(DeviceInformation.LocId, FtOpenType.OpenByLocation, out _ftHandle);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Failed to open device {DeviceInformation.Description}, status: {ftStatus}");
}
// Set the clock
FtClockRate ft4222Clock = FtClockRate.Clock24MHz;
ftStatus = FtFunction.FT4222_SetClock(_ftHandle, ft4222Clock);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Failed set clock rate {ft4222Clock} on device: {DeviceInformation.Description}, status: {ftStatus}");
}
// Set the device as I2C Master
ftStatus = FtFunction.FT4222_I2CMaster_Init(_ftHandle, I2cMasterFrequencyKbps);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Failed to initialize I2C Master mode on device: {DeviceInformation.Description}, status: {ftStatus}");
}
}
public static extern FtStatus FT_GetDeviceInfoDetail(uint index, out uint flags, out FtDevice chiptype, out uint id, out uint locid, in byte serialnumber, in byte description, out IntPtr ftHandle);
/// <summary>
/// Instantiates a FT4222 Device object.
/// </summary>
/// <param name="ftdevice">a FT Device</param>
public Ft4222Device(FtDevice ftdevice)
: base(ftdevice.Flags, ftdevice.Type, ftdevice.Id, ftdevice.LocId, ftdevice.SerialNumber, ftdevice.Description)
{
}