Using the NIDAQ driver and Visual C++ there is a problem with 32 bit output for the PCI 6534. When configuring the PCI 6534 card for double buffered pattern generation setting the group size equal to 4 (i.e. a 32 bit group) in the NIDAQ function:
status = DIG_Grp_Config (deviceNumber, group, groupSize, port, dir)
results in corrupted bit outputs. I see this with my own software and by modifying the example program :
DOdoubleBufPatternGen653x.C to output a periodic waveform (i.e. toggling a bit and watching it on an oscilliscope). Buffer alignment using the function :
status = Align_DMA_Buffer (deviceNumber, resource, buffer, count, bufferSize, alignIndex)
has the appropriate setting for the resource parameter.
Setting th
e groupSize equal to 2 (16 bit groups) results in correct output. This is a sufficient work around for me but I thought I would report the problem.
