|
Re: Gyro angle in simulation vs reality?
There are two types of data flow diagrams, pull and push.
The pull type works from the answer backwards. It determines what it needs in order to compute the result and back propagates to the next layer of what it needs to know. Therefore, it doesn't need to calculate the red value.
The push type executes the other way around. It starts with what it knows and pushes it to the downstream areas until it has produced the result.
Because LV diagrams contain as much I/O as they do, it was decided to use the push model. This means that side-effects such as I/O in the red area will happen even if the results are not used. If you wish to avoid the red calculations, the technique is to use the switch/case statement.
The other way to determine this ...
When a LV diagram executes, it executes all nodes it contains exactly once. That requires both red and green to execute. The case/switch simply decides not to execute one of its diagrams. The for loop, by contrast, executes its diagram N times. Hope that helps.
Greg McKaskle
|