Do While True
bit = 1 - bit
DAQmxErrChk DAQmxWriteDigitalLines(taskHandle2, 1, 1, 5#, DAQmx_Val_GroupByChannel, bit, sampsPerChanWritten, ByVal 0&)
' this need 2m , too slow , how to faster ??
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Is there any setting in DAQmx to let USB-6501 faster output ??