Difference between LabVIEW small end sequence and large end sequence

LabVIEW  The difference between small end sequence and large end sequence

We can see that there are small end sequences and large end sequences in some example programs , What does the byte order here mean ？

answer : endian It shows how multi byte binary numbers are stored .

For example, , Double bytes can be stored in large endian format (MSB LSB) Or small endian format (LSB MSB),MSB The most significant byte is stored instead of LSB The least significant byte is stored . For example, you want to use double bytes to store numbers 1, Then you can put the most significant byte first (00000000 00000001), At this time, the leftmost bit represents 2^15; Or you can put the least significant bit byte first , At this time, the leftmost bit represents 2^7. Understanding of binary numbers according to the application used , Can be 00000001 00000000 Read as 1, Or you can read it as 256, Here are examples of these two types of storage .

It should be noted that whether it is plastic surgery , Double precision or array , Byte order uses the same rules to organize data , They are divided into large end sequence or small end sequence . therefore , When reading a small endian data type, it needs to be converted to a large endian , vice versa . have access to labview Medium Swap Bytes VI.

Use Labview Medium Flatten to String, Unflatten FromSting, Write to Binary File, and Read Binary File VIs Of byteorder The input allows you to select the byte order .

Labview Use large endian format to process and store multi byte data , Even in the Windows(x86) On the platform . The small end sequence is based on Intel x86 The choice of processor , Motorola processor ( Include Macintosh The computer ,Labview The beginning of development is ) Using a large end sequence . It should be noted that C And others Windows Applications expect data to be represented by a small end order . Please refer to the attached routine .

More details , Participate in the introduction of the following annex .

LabVIEW、LabVIEW Development 、LabVIEW Programming 、LabVIEW Program

Examples and information mentioned above , Both in word In the attachment in , Click to download . Learn more , Can you contact us .

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