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Forum Newbie
Group: Forum Members
Last Login: 5/21/2008 9:22:06 AM
Posts: 2,
Visits: 5
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| I am sending triggers via the parallel port, using the STIM to SCAN cable. When I check the "test trigger port", the triggers are all being received correctly. However, when running Acquire in Neuroscan, no triggers appear. I tried different possibilities with a set-up of 32 channels :
When I write "255" to the port and then write "1", "254" will appear in Acquire
When I write "255" to the port and then write "2", "253" will appear in Acquire
When I write "255" to the port and then write "3", no trigger will appear in Acquire
When I write "255" to the port and then write "4", "251" will appear in Acquire... With a set-up of 64 channels, no trigger appears whatever what is written in the port Does anyone know of any reason for this? Raymond
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Forum MVP
Group: Administrators
Last Login: Yesterday @ 10:30:44 PM
Posts: 549,
Visits: 1,198
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| What happens if you wait a little time and then clear the port? Some apps require seeing a rising and falling edge. For example, what values does STIM, etc see if you try this... Dim x As Long
For x = 0 To 255
WritePort &H378, x
Sleep 10
WritePort &H378, 0
Sleep 10
Next 'x -Brandon
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