LV Embedded Programming Style Guide

A Programming Style Guide for LabVIEW Embedded and ZBrain SDK.

• Only do small development steps at a time!
  Remember, while working in FDM mode the code is executed on the PC and not on the target. Timing is different and VIs might execute different.
• For this reason its absolutely crucial that only small pieces of code are developed in FDM mode, then compiled and tested in real time on the target
• DO NOT use the LabVIEW “run” or “deploy” to execute your program on the target.
  Use the “build” command and then manually download the *.dxe file to the target using VisualDSP

• Use a single loop approach wherever possible.
  Parallel loops are suitable only for loop times > 200ms and they introduce timing jitter of 50..150ms.
• Do NOT use timed loops, use while loops instead
• Do NOT use local variables
• REMOVE all unnecessary frontpanel controls and indicators
• Do NOT change the default compiler settings (e.g. code optimization)
• Open all hardware references (e.g. “open dout”) at program start
• Use only basic VIs, Express VIs etc. don't work

• A guide for memory optimised code from NI: optimizing_labview_embedded_applications.pdf