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How to get and implement the string...


pockey

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Hi, all

I'm writing a program to test a board. And the front panel is shown as follows:

http://forums.lavag.org/index.php?act=attach&type=post&id=5056

When I click the "Start ADC" button, the computer will send a command to the board and the board will return both the command and hex string with 50 values.

As shown "0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE...."(they're the same as a testing)

My job now is to take out the 50 values and calculate the average of them.

It seems there's a tool called "Hexstring to number", I think I could use it to take every element out(not include the "0x"). However, I could not get the "0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE0xC7CE...." in that button event as shown in the right string indicator. Only the command "c a" was received at that stage.

Below is the block diagram of the "Start ADC" event:

http://forums.lavag.org/index.php?act=attach&type=post&id=5055

As I did not know how to get the hex string, I could do nothing to get the average value.....

Anyone could give me some tips?? Thanks a lot!

The original VI is aslo attached.

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Thank you for your help!!

So now I know how to convert the string to an array.

However, the first problem is still there...I don't know how to get the exact hex string.

http://forums.lavag.org/index.php?act=attach&type=post&id=5071

As shown, I could only get the "c a" command. It seems the hex string value will be received until next Read from the COM Port.

http://forums.lavag.org/index.php?act=attach&type=post&id=5072

And if I replace the SubVI with detailed write and read implementation, I still could only get the "c a" in String Indicator 2

http://forums.lavag.org/index.php?act=attach&type=post&id=5073

It's so difficult to get the desired string from the COM Port......

And without the string, I could do nothing:(

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http://forums.lavag.org/index.php?act=attach&type=post&id=5075

The hyperterminal is shown as above. However, I do not understand much about "display type"....

I did not use the SubVI in this event so that I can get the string without previous information.

And there's nothing shown in String Indicator 2 if I read the COM Port twice.

http://forums.lavag.org/index.php?act=attach&type=post&id=5076

But it's strange that if I "Highlight Execution", the hex string what I want will be shown in the String Indicator 2.

Why, why, why...

I have no idea about "endchar enabled", the SubVI is also attached.

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QUOTE(pockey @ Mar 2 2007, 03:44 AM)

Oh, the problem has been solved! I add wait time before the second read part and with enough wait time, I could get the desired string now!!

And now I want to calculate the average of the total 51 hex values, is there such function offered by LabVIEW?

Why the two reads?

Mean.vi?

Ton

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