Hello All, I am a beginner in Labview and need some assistance on the below: I want to create an interactive console application with Labview to communicate over RS 232. The GUI should allow me to 1. Send some specific commands over RS 232. (This I guess I will be able to do if I get a base application). 2. Receive 16 bit data over RS 232 and log it to a file. (This I guess will be tricky as RS 232 is 8 bit communication standard and the application like windows Hyperterminal will interpret 16 bit data as 2 8 bit ascii characters, which I dont want) Let me know any thoughts on how to go ahead., Thanks so much, Nagaraj Hegde

LabVIEW

16 bit receive over rs 232

@Intelligent wrote:

Hello,

I am also working on the same project and from this discussion i have developed a 16 bit receiver but the problem is that it interprets the LSB and MSB incorrectly. Also that, if it starts correctly at the begining than sometimes interchange the Bytes it in the middle of the program.

Here i completly explains my project.

I have an analog signal which is digitized through my 12 bit ADC and is serially transmitted to the PC through RS232, Here i have to view the signal similarly as it is generated with its exact parameters of amplitude and frequency.

Problems

1- LSB and MSB are interchanging each other every time. Even between the program.

2- Data is displayed on the chart as a variable against time. But the parameters are not evaluated.

Solutions in my mind:

Definitely i have to decode the bytes so that it may differentiate the MSB and LSB. I have the advantage that i am using 12 bits so that the upper nibble can be used to decode the MSB and LSB.

Please do not HI-Jack other threads. And you also have a discussion very related to this question going on here http://forums.ni.com/t5/LabVIEW/Receiving-Multichannel-data-serially-on-Labview/m-p/1403610#M546469 Please stay in one thread.

Also a reminder. Do not hope that we at any time will do your programming for you. We may give you a push in the correct direction. IF you put in some effort by your self. Like posting your code then you are asked to do so. I can give you a hint. You must develop some communication protocol that ensure your Labview app is in sync with your MCU board. And also a method to detect out of sync situations. If you want to know how. We may take up that discussion in your original thread, OK!