Cut a single bit of a byte?

OK, so im a mechanical guy, not a guy of programming allows so start there.  I just learn how works the hexadecimal and have limited experience in LABview.  I searched this topic for days, maybe that's just my vocabulary, but I have not found anything.

I need to analyze a signal from a CAN system.  I have not the device can still, but I'm to access sensors position on the system.  They come as 8-bit hexadecimal messages.  I am currently simulating this message string in LABview, so I can get some of my loan program.  The manufacturer gave me the example of code that requires the concatenation of two bytes, but I only need 3 bits to concatenate. (the last cut piece and the other 2 must first hoist little.)  I've already concatenated the two bytes required but may not know how to get rid of a single bit.  I need to do as hex values for appropriate measures.  I know my grammar programming is probably only a little off so let me give you an example.

Example of a string of hexadecimal values

03 23 21 B4 C4 74 F6 F6

The first sensor requires bits 3 & 4 (21 & b4)

In this case, they must be in the order of 4.3 and drop the first bit to receive 421 as the necessary hex value.  So far, I have made an input string to simulate the entrance CAN message with this 8-bit hex values.  I then use subset of string to isolate the individual bytes and concatenate finally to get them in the right order and end upward with B421.  I can't figure out how to drop the 'B' bit or replace it with a zero.  I can only replace complete byte.

Y at - it an easier way to do it.  I intend to use the example of VI to receive the CAN messages which returns a string, so why I am using strings.

Thanks in advance for the help.  I'm going crazy trying to figure this out.

Also if all the other details are required please let me know

Here's my VI.  Yes, they are formatted as hexadecimal strings.  Just trying to be part of the programming carried out before entering the test site.

The manufacturer told me that the hexadecimal string of 3 bits can then be converted into usable numbers.  So, if its more faster/easier to replace the first byte of a 0 or be a hexadecimal string of 3 bits.  Either will work.

Thank you for responding so quickly, I should have posted here yesterday haha.  I have not used LabVIEW for about 5 years, and that was just basic stuff so I'm back in the swing of things.

Tags: NI Software

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