Communication to Hyperterminal with the NI 9871 RS-422

[jejackson]

I am trying to transmit data using the NI-9871 RS-422/485 module. The simple FPGA VI i created is attached. However when i attach the cable to COM1 on my PC, data does not output to Hyperterminal. Is there anything wrong with the FPGA VI I have coded? All i am trying to do at this point is make something very simple that works, which i can build on later. For reference, on the front panel I am configuring the Baud rate=9600, data bits=8, flow control=none, baud rate divisor=1, transceiver mode = 4 wire, parity=none, stop bits = 1. These are the same values on hyperterminal.

[Ben_S]

jejackson,

There is a great tutorial on our website on the topic of RS-232/RS-422/RS-485 on a FPGA Target. Also, there is a great example program for the NI 9870, called Continuous Serial Read - On-Demand Write, that could be adapted for the NI 9871. I hope these documents help you out!