Keeping Serial Data when flushing buffer

[IRserial]

Hi,

I am reading data from the serial port. The data are comming from 3 channels and arrive in this way:

[00][B](channel1)-[FF][01](channel2)-[11][F7](channel3)-[00][44](channel1)-[FF][33](channel2)-...

I've done a while loop to read these data. In the loop, I read each channel one by one (1st read=2bytes, 2nd read=2bytes and 3rd read=2bytes) before flushing the buffer and doing the loop. The baud rate=4800 and the Sample rate=240Sample/s. The problem is when I do my loop I lost data in a way that when the loop restart I don't know wich channel I am reading with the first read.

How can I solve this problem?

Thank you

Francois

[LuI]

Francois,

the main idea is to flush just at the beginning and afterwards to use a kind of circular buffer to append new data and remove complete data sets. To detect a dataset you can use the match_pattern node with a  regular expression of "\00.\FF.\11.". If match_pattern did match, change the match to an array of bytes and use the bytes at 1, 3 and 5 as your data. I have prepared an example on how to do this

Greetings from Germany!
--
UweGreetings from Germany!
--
Uwe

[IRserial]

Thank you Uwe,

I can't open the VI  with my LabVIEW version (7.0), Can you give me the screen shot of the block diagram??

Thank you again

François

[MissyS]

François,
I saved it to 7.0 for you. Enjoy!