well, I go for usability, so I take 6% overhead and working over 1% and broken any time.
Anyway let's give it a try with your approach: the sim_spindle.comp didnt compile and needed a bit of polish I created a sim config to integrate it which 'runs' - speed rampup/rampdown and at-speed work fine and G33.1 doesnt block anymore the g33.1 and G84 cycles to funny things to spindle speed at the end of the cycle, so this still needs work - Michael ps: cant push to my repo right now, so here as a patch:
0001-sim-try-sim_spindle-component.patch
Description: Binary data
Am 05.01.2012 um 03:19 schrieb Jeff Epler:
> IMO, it's a feature that the most basic sim configurations don't require
> a base thread.
>
> On my system (2.8GHz AMD), rtapi_app takes ~1% CPU before the change and
> about 6% after. Admittedly 6% isn't much, but it's worse than 1%.
>
> Perhaps we should write a simulated spindle that can work without
> requiring a base thread.
>
> Here's a first stab at this. I looked at some traces in halscope but
> didn't try any simulated rigid tapping.
>
> // ---------------------------------------------------------------------
> component sim_spindle "Simulated spindle with index pulse";
>
> pin in float velocity-cmd "Commanded speed, in revolutions per second";
> pin out float position-fb "Feedback position, in revolutions";
> pin io bit index-enable "Reset position-fb to 0 at the next full rotation";
>
> license "GPL";
>
> function _;
> ;;
> #include <rtapi_math.h>
>
>
> FUNCTION(_) {
> double old_position = position;
> double new_position = position + speed * fperiod;
>
> if(index_enable && (floor(old_position) != floor(new_position))) {
> index_enable = false;
> if(speed < 0)
> new_position = new_position - ceil(new_position);
> else
> new_position = new_position - floor(new_position);
> }
>
> position = new_position;
> }
> // ---------------------------------------------------------------------
>
> Jeff
>
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