UART Communication via LabView

[bkeller]

I am trying to determine the best way to interface a PIC microcontroller with LabView via UART.  I need some sort of digital I/O hardware that can meet the following constraints:

-The PIC board has pinouts for USART TX and RX.

-Ultimately, the computer/Labview module will be responsible for communicating with up to 24 microcontrollers at once; this is 48 digital I/O at a bare minimum.  Ideally, only a single hardware module would be used to connect to these devices (or a few daisy-chained together).

-This hardware module would ideally communicate with the PC via USB, although a serial connection would work as well.  It needs to play nice with LabView, of course.

-Baud rates should be as fast as possible.

Does NI make any hardware that can accomplish this?

Thanks,
Ben

[K C]

Hi Ben,

If you want to address so many devices I would use a RS-485 interface a use (or make it yourself) a protocol like ModBus so you can address devices.

On the software side it will take more time but on the hardware side you just need RS-485 transceivers and a simple 2-wire cable from device to device.

[uv_0209]

hello...i have this attached vi which randomly generate the data and plot it on the graph..as i stop the vi it will save the data in text file with time stamp..now here the need is that i have UART programming by which i have to plot the data coming through UART in this vi..plz help me by editing this vi for UART programming..

thank you..

[Ryan-OC]

Hello uv_0209,

Here are some useful resources that may be able to help you accomplish what you are trying to do.

https://decibel.ni.com/content/docs/DOC-17963

http://forums.ni.com/t5/LabVIEW-Embedded/How-to-send-recive-this-package-in-UART/m-p/984683

[uv_0209]

thank u sir..

here i have attached edited vi for plotting the data coming through UART..plz give me correction if there is any problem in it..plz reply as soon as possible..i need it urgently.

[fromm8]

 Hello uv_0209,

I do not see anything odd. You should test it and let us know if the behavior is the expected or not.

Regards

[uv_0209]

i tested the vi..i connect the adc program code generating ascii data..but on front panel i have gotcha data as 0 only..

[shubhamtuli]

Hello, Did you program is now working. Have you solved the problem why you are getting zero's?