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Read USB from HART Evaluation Kit


Ano Ano

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I have a DS5800 evaluation kit from Maxim Integrated and it comes with a USB port to read/write data. It also comes along with Maxim's software to read/write string data. I thought of interfacing it with LabVIEW and read from it. I tried to use the generic USB vi's in the example finder just in case I can read something but as expected it cannot even see anything connected.

 

Is there any way to get information from this or any USB port?

 

 

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Does the Maxim software come with a DLL or .NET assembly for interfacing to their device? If so, that's your best bet. While you can use VISA to talk directly to a USB device, you'd have to determine the correct protocol (through documentation or experimentation) and implement it, which would be very time consuming.

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Thank you all for the replies.
 
The evaluation board comes with a software (*.exe & *.dll) written in .Net Framework v4.6 (I used a decompiler to find out!). The problem now is how to load it in LabVIEW. There is no .h file accompanying the .dll and if I import "connectivity>.NET> property/invoke then there is a huge list of commands but its not clear what to use to read & write. By the way the DS8500 is a HART modem.

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From a quick read through the datasheet for the evaluation kit, I see the following: "The onboard MAXQ622 is only for demonstration purposes (USB interface) and does not implement a HART software stack. The serial UART data and control pins are exposed via jumpers as detailed in Table 1. They allow a hardware serial port on a PC or laptop to transmit and receive modulated signals. Note that these serial pins expect TTL level signals (3.3V), not RS-232 level, so a serial level shifter board is typically required for communications."

 

Looks like the easiest way to connect this to LabVIEW is through a serial port connected to the serial connections on the board, with appropriate level shifting (or buy a USB-serial adapter that expects TTL level signals).

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