Numbers of long to show using RS232

I am trying to learn LabVIEW. I was able to do serial communication based on the example of database read/write. I can send a single byte. In fact, I read only since the serial port in labview. What I do receives 4 bytes and combine them as a single integer 32-bit. I'll read as 4 buffer. I have essentially 2 problems:

1 - because the sender and the receiver (labview) does not start the communication at the same time there is a synchronization problem. The incoming bytes are not in order (LSB and MSBs may not be in the right place)

2. I should interpret the characters that come in the form of numbers and combine 4 of them in one number and in the right order, do it all the time and then store them in a table.

Can you give me some advice. Is there an easy way to do this?

Note: I will also send the whole even in the future. Sending a number of 32-bit to the idea of port is also appreciated.

Thank you.

Since you have control of the Protocol, you can manage it as you like.  I advise to use a type of command/response communication.  You send a command to the microcontroller and the microcontroller sends data back.  If you require data flow, then have a stream of departure order and a stop of flow control.  This way you can make sure the series stamps are clear and you can read the data correctly.

Now the serial drivers (I assume that you use VISA) send channels.  So what you want to do, is use the flatten to the chain and chain Unflatten to convert the return data type a suite.

Tags: NI Software

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