PBP projects for R/C models

[Kenjones1935]

Individually the parts of the system seems to pass their tests.
The DPDT switches worked according to their truth tables.
The proximity switches echoed what looked like sensible responses.
The wheels turned and the steering responded as the DPDT switches asked of them.

However, the car does not work as a system. The PIC is running. The proximity sensors have LED's that blink when pulsed. These work. After a while the proximity detectors stop. All this is in the code, but the steering does not move at all. The wheels do not reverse when something is seen to be right in front of the car.

Question is: What kinds of debugging power do I have once the code is in the PIC besides the Logic Tool Analyze mode?

Ken

[Archangel]

Question is: What kinds of debugging power do I have once the code is in the PIC besides the Logic Tool Analyze mode?

Ken

You can hook up a serial LCD to the system and use debug to send the value stored in your variables, you can store port status in a variable and debug too.

[ScaleRobotics]

I made some progress with 5 channel PWM measurement using a single pin. Curently 5 RC channels are being measured using capture on a PIC12f683. Right now, only one channel is being passed through, but it is possible to get a max of 4 channel pass through on this chip. Bruce gave me the idea of measuring all 5 channels on one pin with his remote code learning thread: http://picbasic.co.uk/forum/showthread.php?t=12555

I need to work on getting channel 1 to be recognized as channel 1. Somehow, I need to check for a low on CCP1 for 3ms or so (between channel 5 and channel1). Anyone got a suggestion on how to do this?

Right now, you have to restart the circuit a few times to get channel 1 output to be channel 1 input. It sometimes selects channel2,3,4 or 5 (depends when you turn the chip on, and which rise it sees first). But the output now is pretty rock solid, no jitters.

I tried to label my ASM pretty well, but I need to work on this overall, especially the variables.

total words used = 275

http://scalerobotics.com/PWMpassthrough.html

[Acetronics2]

Hi,

Ok, it's not PBP ... But it does the trick.

http://www.rcgroups.com/forums/showthread.php?t=576165

Alain

[ScaleRobotics]

Hi,

Ok, it's not PBP ... But it does the trick.

http://www.rcgroups.com/forums/showthread.php?t=576165

Alain

Thanks Alain (was that for me, or Ken??),

But I currently am able to encode 1 channel while decoding 5 channels with the below code:

http://scalerobotics.com/PWMpassthrough.html

And soon should be able to add 3 outputs, and have 4 encoded channels out, while decoding 5 channels in with the pic12f683 (and 3 diodes).

But, what I can't get my head around is how to ensure the CCP1 interrupt starts the first time on RC channel 1 (first pulse). It needs to look for a low of 3ms or so, to ensure channel 1 is looking at channel 1.

Oh .... and I need to do this in ASM.

Thanks for any help you can offer.

[Acetronics2]

Hi,

Sorry ... I didn't verify the link ... ( Xtal wrote both enc and dec ...)

those ones are real decoders

Alain

[ScaleRobotics]

Thank you very much Alain, just what I was looking for!

Need to see how they do their "sync gap", but I notice he has a number of other enhancements as well ... interesting.

Walter