PBP projects for R/C models

[rmteo]

Hey RMTEO,

Don't be shy about posting actual code. We would love to see your PBP example of the above.

Hey SCALREOBOTICS,

What made you think that I was going to do that in PBP? I do not think that PBP would be the way to go for Ken's situation but I would be happy to have you prove me wrong.

[mackrackit]

Hey SCALREOBOTICS,

What made you think that I was going to do that in PBP? I do not think that PBP would be the way to go for Ken's situation but I would be happy to have you prove me wrong.

Then why would you suggest that Ken do it? Other than to add more confusion or a chance to say something else is better.

Why do you not post something to try helping. Always posting that another compiler is better is not a help. Other compilers might be better but that is not the issue here.

So I will ask you to not to post on this forum if that is all you have to say.

[ScaleRobotics]

Hey SCALREOBOTICS,

What made you think that I was going to do that in PBP?

Uh ....... in case you didn't notice, this is a PicBasic forum. That would be what is spoken here. Each language that you recommend have their own forum. And we don't go there talking about PBP, do we?

[rmteo]

Ken, good luck with your project.

[Kenjones1935]

rmteo's comments DO help. I went to WIKIPEDIA and looked up PID and pretty much understand what it is - sort of. It ain't so complicated as the single formulaic representation makes it appear.

Question about PBP and my 16F887. I think the spec for my robocar says to produce one PWM pulse every 20 msec. Each pulse varying in width from 1 to 2 msec in 256 segments. A 1.5msec (created by 127 segments) pulse is neutral. In the case of my Electronic Speed Control anything above 1.5msec is FORWARD. Anything shorter than 1.5msec is BACK. What must I do to scale my chip's 4MHZ oscillator to accomplish this fete?

What I am presently doing I came across by trial and error. I am not sure what shape the PIC is actually producing.

Ken

[mackrackit]

Lets go back a little
http://www.picbasic.co.uk/forum/show...4621#post94621

[Kenjones1935]

I have not learned to SEARCH the forum.

How about I return to basics. How about I make my controls interrupt driven. If had an interrupt routine that ran every 20msec, I could create a true-so-spec PWM signal and I could measure rate of closing speed for each SONAR. I think the 16F887 can get all my work done in 20msec. If not I can up the PIC power.

Way back someone told me how to set up such an interrupt system. Where is that? It's Monday morning. Time to get moving.

Ken

[mackrackit]

Thank you for the October reference.

I have not learned to SEARCH the forum.

??????
No search required for that, it is a part of this thread.

Anyways, have you looked over the PID routines given by Henrik Olsson?

[ScaleRobotics]

Hey Ken,

I know a lot of people prefer on interrupt type. But my vote for easy interrupt is to use Darrels instant interrupts (and I think an equally large number of people like them as well). Here is a simple example of a blinky interrupt using his include files. The pages on this site have a lot of information about the different kinds of interrupts you can do. Your chip needs to use DT_INTS-14. And of course DT_INTS-18 is for PIC18 devices.

http://darreltaylor.com/DT_INTS-14/blinky.html

[cncmachineguy]

I don't think you want on interupt, just my opinion from reading the manual. I think you want to figure out DT int. Seems to be true int without Dealing with ASM.