private static string GetLastExceptionMessage(short handle)
{
TC08DeviceImports.ErrorCode error = (TC08DeviceImports.ErrorCode)TC08DeviceImports.GetLastError(handle);
switch (error)
{
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_OK:
return("No error occurred.");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_OS_NOT_SUPPORTED:
return("The driver supports Windows XP SP2 or later, Windows Vista, and Windows 7.");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_NO_CHANNELS_SET:
return("A call to usb_tc08_set_channel is required.");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_INVALID_PARAMETER:
return("One or more of the function arguments were invalid.");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_VARIANT_NOT_SUPPORTED:
return("The hardware version is not supported. Download the latest driver.");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_INCORRECT_MODE:
return
("An incompatible mix of legacy and non-legacy functions was called (or usb_tc08_get_single was called while in streaming mode.)");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_ENUMERATION_INCOMPLETE:
return("usb_tc08_open_unit_async was called again while a background enumeration was already in progress.");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_NOT_RESPONDING:
return("Cannot get a reply from a USB TC-08.");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_FW_FAIL:
return("Unable to download firmware.");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_CONFIG_FAIL:
return("Missing or corrupted EEPROM.");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_NOT_FOUND:
return("Cannot find enumerated device.");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_THREAD_FAIL:
return("A threading function failed.");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_PIPE_INFO_FAIL:
return("Can not get USB pipe information.");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_NOT_CALIBRATED:
return("No calibration date was found.");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_PICOPP_TOO_OLD:
return("An old picopp.sys driver was found on the system.");
case TC08DeviceImports.ErrorCode.USBTC08_ERROR_COMMUNICATION:
return("The PC has lost communication with the device.");
default:
return("Unknown Error");
}
}
/// <summary>
/// Called when a device closes and wants to notify the device manager
/// </summary>
/// <param name="handle">The handle.</param>
private void OnClosed(short handle)
{
Trace.WriteLine("Device " + handle + " closed");
TC08DeviceImports.CloseUnit(handle);
TC08Device device;
_openDevices.TryRemove(handle, out device);
}
private void SetChannel(int channel, char thermoType)
{
short result = TC08DeviceImports.SetChannel(Handle, (short)channel, thermoType);
if (result == 0)
{
throw new TC08Exception(result);
}
}
/// <summary>
/// Configures the device to capture.
/// </summary>
public void Configure()
{
TC08DeviceImports.SetRejectionFreq(Handle, (short)FrequencyRejection);
for (int i = 1; i < TC08MaxChannels + 1; i++)
{
TC08ChannelConfig found = EnabledChannels.FirstOrDefault(dev => dev.Number == i);
SetChannel(i, found != null ? found.ThermoType : ' ');
}
}
/// <summary>
/// Checks for new devices.
/// </summary>
/// <returns></returns>
private IEnumerable <TC08Device> CheckForNewDevices()
{
short handle = 0;
while ((handle = TC08DeviceImports.OpenUnit()) > 0)
{
TC08Device device = new TC08Device(handle, OnClosed);
Trace.WriteLine("Device Found - \r\n" + device.DeviceInfo);
yield return(device);
}
}
/// <summary>
/// Devices poll to detect disconnect
/// </summary>
private void DevicePollOnElapsed(object sender, ElapsedEventArgs elapsedEventArgs)
{
TC08DeviceImports.SetChannel(Handle, 0, 'X');
short error = TC08DeviceImports.GetLastError(Handle);
if (error > 6 && Connected)
{
Connected = false;
_devicePoll.Stop();
_onClosed(Handle);
}
}
public TC08Device(short handle, Action <short> onClosed)
{
Handle = handle;
_onClosed = onClosed;
StringBuilder builder = new StringBuilder(TC08MaxInfoLength);
TC08DeviceImports.GetFormattedInfo(Handle, builder, TC08MaxInfoLength);
DeviceInfo = builder.ToString();
EnabledChannels = new List <TC08ChannelConfig>();
_devicePoll = new Timer(2222);
_devicePoll.Elapsed += DevicePollOnElapsed;
_devicePoll.Start();
Connected = true;
}
/// <summary>
/// Gets the temperature values.
/// </summary>
/// <param name="unit">The temperature unit.</param>
/// <returns></returns>
/// <exception cref="TC08Exception"></exception>
public unsafe float[] GetValues(TC08DeviceImports.TempUnit unit)
{
float[] data = new float[9];
short overflows;
short result = TC08DeviceImports.GetSingle(Handle, data, &overflows, unit);
if (result == 0)
{
throw new TC08Exception(result);
}
for (int i = 0; i < data.Length; i++)
{
data[i] = (float)Math.Round(data[i], 2);
}
return(data);
}
