Sending out in decimal, reading in hex

[crossrulz]

It would be easiest to simply build an array of the length and data, do not include the header data.  Calculate the checksum based on that array.  Then do a final build array with the header data, previously build array (length and data), and the newly calculated checksum.

[Demetri90]

---

@crossrulz wrote:

It would be easiest to simply build an array of the length and data, do not include the header data.  Calculate the checksum based on that array.  Then do a final build array with the header data, previously build array (length and data), and the newly calculated checksum.

---

Here's the thing I can't seem to progress on, in order for the size to be calculated, it must factor in the checksum elements as well. The user shouldnt have to enter elements for the size, or checksum. The way the code is now, you have to enter the last two checksum elements in order for the size to be correct.

[Demetri90]

So I guess the way it would be is...

User enters data

calculate checksum

calculate size

add header

send out

[nyc_(is_out_of_here)]

The checksum should be a default size of 1 byte or 2 byte or whatever.

That should be known ahead of time.

[Demetri90]

Checksum has a low and high byte, so 2 bytes right?

[crossrulz]

Correct.  Since we know the checksum has 2 bytes, simply add 2 to the array size before adding it to the array.

Spoiler

[Demetri90]

I see. So what's happening is:

Data is entered, then finds array size and adds 2 elements to it, then splits it to get our high/low bytes, then the header, data, and checksum are built into the array, and sent out.

[crossrulz]

---

@Demetri90 wrote:

I see. So what's happening is:

Data is entered, then finds array size and adds 2 elements to it, then splits it to get our high/low bytes, then the header, data, and checksum are built into the array, and sent out.

---

Exactly!  And as you already know, you have to convert the byte array into a string so you can send it out of the COM port.

[Demetri90]

Awesome, my uncle (the engineer) was using it and everything seems to be working so far. Is it possible to have a toggle switch trigger a set of commands to send to the board? We have an led on the board but it takes a few commands to get it lit/un lit. I just want to be able to flick a switch on Labview and have it turn on/off.

[crossrulz]

Look into the event structure.  You will want the Value Change event for your button.