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LabVIEW
serial Communication with a PXI 1428 Framegrabber
Hi folks,
I have a question concerning the serial communication with a NI PXI 1428 Framegrabber Card.
We are building a LVDS-adapter that will be connected to the NI PXI 1428 Card. The Communication between the LDVS-adapter and the PXI 1428 shall be done thru the serial interface (embeeded on the PXI 1428). The serial communication of our LVDS-adapter does not use termination Strings -- so when reading form the adapter we are getting 8192 Bytes of 0x00 returned.
I have already found a discription and a possible workaround for the problem:
http://digital.ni.com/public.nsf/allkb/AC2718B38FF2CD5F8625726E00068CA5
So apparently I will need to use the SerialReadBytes.vi, but their is one point that is unclear to me. Assuming I use the SerialReadBytes.vi and I want to read lets say 2 bytes. Lets further assume that the 2 Bytes I will read are 0x00 and 0x00 -- so how do I determine whether those 2 Bytes are actually wirtten by my adapeter or just some empty buffer form the NI PXI 1428.
i hope u understood my question
bye
We are building a LVDS-adapter that will be connected to the NI PXI 1428 Card. The Communication between the LDVS-adapter and the PXI 1428 shall be done thru the serial interface (embeeded on the PXI 1428). The serial communication of our LVDS-adapter does not use termination Strings -- so when reading form the adapter we are getting 8192 Bytes of 0x00 returned.
I have already found a discription and a possible workaround for the problem:
http://digital.ni.com/public.nsf/allkb/AC2718B38FF2CD5F8625726E00068CA5
So apparently I will need to use the SerialReadBytes.vi, but their is one point that is unclear to me. Assuming I use the SerialReadBytes.vi and I want to read lets say 2 bytes. Lets further assume that the 2 Bytes I will read are 0x00 and 0x00 -- so how do I determine whether those 2 Bytes are actually wirtten by my adapeter or just some empty buffer form the NI PXI 1428.
i hope u understood my question
bye
