04-26-2017 02:50 AM
Hi, I've been trying to communicate with the myRIO using this board to no avail, I have discovered only recently that myRIO doesn't support RS232 comm without the UART rapper.
I'm wondering if there are any other configuration I could try to set up the communication since I'm only interested in receiving from this one device with out transmitting anything.
I found a discussion in the forum where a someone suggests the following :-
tannerite N/A 07-15-2014 01:02 PM One thing I think worth mentioning is that there are UART TX and RX lines on the MXP connectors that can be used to interface with a serial transceiver. They cannot use "2-wire DTR controller" or "2-wire DTR controlled with echo" modes because the DTR lines do not exist on myRIO; however, you can use 4-wire or 2-wire auto modes depending on how you configure the transceiver. I believe you can do multi-drop with 4-wire mode, but you cannot do multi-point. Multi-drop means multiple receivers while multi-point means there can be multiple transeivers and receivers. When in 4-wire mode, there are separate pairs for TX and RX, you can do multiple receivers but only one transmitter. The UART TX and RX lines on myRIO were designed to be connected to a serial transceiver, whether it be RS-232 or RS-485. I hope this helps. Tannerite National Instruments
I'm wondering if what he's suggesting is relevant to my issue, and would love some extra details.
Thank you.
04-26-2017 09:28 AM - edited 04-26-2017 09:32 AM
If this board is actual RS-232 voltage levels then you need an RS-232 to Logic converter like the old MAX232 chip or similar between your board and the MyRIO.