Code: Select all

Imports.SetSimpleTrigger(_handle, 1, Imports.Channel.ChannelC, threshold_lsb, Imports.ThresholdDirection.Falling, 0, 0);

uint ires = Imports.setExternalClock(_handle, externalSyncFrequency, threshold_lsb);

Code: Select all

[DllImport(_DRIVER_FILENAME, EntryPoint = "ps6000SetSimpleTrigger")]
internal static extern UInt32 SetSimpleTrigger(
        	short handle,
        	short enabled,
        	Channel channel,
        	short threshold,
        	ThresholdDirection direction,
        	uint delay,
        	short autoTriggerMs);
                        
[DllImport(_DRIVER_FILENAME, EntryPoint = "ps6000SetExternalClock")]
internal static extern UInt32 setExternalClock(
		short handle,
		ExternalSyncFrequency frequency,
		short threshold);
			

Code: Select all

internal uint picoSyncTest()
{
	string[] devices = { "" };		
	uint status = 0;			

	try
	{
		//Enumerate devices
		short serialNumLength = 255;
		StringBuilder sb = new StringBuilder(serialNumLength);
		status = Imports.EnumerateUnits(out short deviceCount, sb, ref serialNumLength);
		if (status != StatusCodes.PICO_OK)
		{
			throw new ArgumentException($"EnumerateUnits: {status} = {StatusMessage.Text[status]}");
		}
		devices = sb.ToString().Split(',');
				
		//Try to open the first unit
		sb = new StringBuilder(devices[0]);
		status = Imports.OpenUnit(out _handle, sb);
		if (status != StatusCodes.PICO_OK)
		{
			throw new ArgumentException($"OpenUnit({devices[0]}): {status} = {StatusMessage.Text[status]}");
		}
		
		//Try to sync the picoScope to an external 10MHz clock, threshold = -0.5V
		Imports.ExternalSyncFrequency externalSyncFrequency = Imports.ExternalSyncFrequency.PS6000_FREQUENCY_10MHZ;
		short threshold_lsb = Convert.ToInt16(-0.5 * Imports.MaxValue);
		status = Imports.setExternalClock(_handle, externalSyncFrequency, threshold_lsb);
		if (status != StatusCodes.PICO_OK)
		{
			throw new ArgumentException($"setExternalClock: {status} = {StatusMessage.Text[status]}");
		}
	}
	catch (Exception ex)
	{
		Console.WriteLine($"Picoscope:{ex.Message}");
	}

	return status;
}