/// <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($"Failed set clock rate {ft4222Clock} on device: {DeviceInformation.Description}with error: {ftStatus}");
}
SpiClockPolarity pol = SpiClockPolarity.ClockIdleLow;
if ((_settings.Mode == SpiMode.Mode2) || (_settings.Mode == SpiMode.Mode3))
{
pol = SpiClockPolarity.ClockIdelHigh;
}
SpiClockPhase pha = SpiClockPhase.ClockLeading;
if ((_settings.Mode == SpiMode.Mode1) || (_settings.Mode == SpiMode.Mode3))
{
pha = SpiClockPhase.ClockTailing;
}
// Configure the SPI
ftStatus = FtFunction.FT4222_SPIMaster_Init(_ftHandle, SpiOperatingMode.Single, tfSpiDiv, pol, pha, (byte)_settings.ChipSelectLine);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Failed setup SPI on device: {DeviceInformation.Description} with error: {ftStatus}");
}
}
/// <summary>
/// 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 == FtDevice.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($"Can't initialize GPIO for device {DeviceInformation.Description}, status: {ftStatus}");
}
}
/// <summary>
/// Create a FT4222 I2C Device
/// </summary>
/// <param name="settings">I2C Connection Settings</param>
/// <param name="frequencyKbps">The speed of I2C transmission.</param>
public Ft4222I2cEx(I2cConnectionSettings settings, uint frequencyKbps = I2cMasterFrequencyKbps)
{
_settings = settings ?? throw new ArgumentNullException(nameof(settings));
FrequencyKbps = frequencyKbps;
// Check device
var devInfos = FtCommon.GetDevices();
if (devInfos.Count == 0)
{
throw new IOException("No FTDI device available");
}
// Select the one from bus Id
// FT4222 propose depending on the mode multiple interfaces. Only the A is available for I2C or where there is none as it's the only interface
var devInfo = devInfos.Where(m => m.Description == "FT4222 A" || m.Description == "FT4222").ToArray();
if ((devInfo.Length == 0) || (devInfo.Length < _settings.BusId))
{
throw new IOException($"Can't find a device to open I2C 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($"Failed to open device {DeviceInformation.Description}, status: {ftStatus}");
}
// Set the clock
FtClockRate ft4222Clock = FtClockRate.Clock24MHz;
ftStatus = FtFunction.FT4222_SetClock(_ftHandle, ft4222Clock);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Failed set clock rate {ft4222Clock} on device: {DeviceInformation.Description}, status: {ftStatus}");
}
// Set the device as I2C Master
ftStatus = FtFunction.FT4222_I2CMaster_Init(_ftHandle, frequencyKbps);
if (ftStatus != FtStatus.Ok)
{
throw new IOException($"Failed to initialize I2C Master mode on device: {DeviceInformation.Description}, status: {ftStatus}");
}
}