PBP projects for R/C models

[Dennis]

Hi all

Thought this might be of some interest, the code is in C and there is no schematic , was just thing of 4 well synchronized hard drive spindle motors a an RC chasis , would be quite a fast car.

Seems like a nice project though!
http://bradthx.blogspot.com/2010/02/...le-motors.html

Kind regards
Dennis

[mackrackit]

Ken,

Just to be sure we are all doing the same thing...

1-- Write and compile the code using MCS.
2-- Generating the ASM file with MCS set for MPASAM use.
3-- Open a project in MPLAB.
4-- Use the ASM file generated by MCS as the source for the MPLAB project.
5-- Everything is in the same project directory.

[Kenjones1935]

1-- Write and compile the code using MCS.
Compile PIC BASIC PRO code using
MicroCode Studio version 3.0.0.5
PICBASICPRO 2.6.0

2-- Generating the ASM file with MCS set for MPASAM use
Using MPASM per the following picture:


3-- Open a project in MPLAB.

Open the project in MPLAB IDE 8.43.00.00
MPDebugger 3.10

4-- Use the ASM file generated by MCS as the source for the MPLAB project.
5-- Everything is in the same project directory.

[mackrackit]

Looks like the only difference is you are using the latest software, I am still using PBP2.50 and MPLAB v8.00.

So I am at a loss now.

[Kenjones1935]

Progress has been slow. It will be more fun when the SN7407's show up and I can make the car move.

Ken

[Kenjones1935]

It's been more than a week. They were supposed to have been shipped via USPS. The vendor is not answering its email. Does not look good.

Meanwhile I might as well get back to the REAL project. I have not decided on the least intrusive means to generate PWM. Using the toy level car all I have is bang/bang control. Full speed forward, full speed backward, stopped. Full turn left, Full turn right, straight ahead.

With PWM control I have CONTROL. Thing is, I do not know whether I really need this complication. Probably not. But I do need for the microprocessor to be doing things while the car is moving. PAUSE does not cut it.

Gotta put back on my thinking cap.

Ken

[ScaleRobotics]

Hey Ken,

Don't know if you saw it, but some progress was made on the 12F683. It is decoding 5 channels, and encoding 4 channels. You could modify the servo output as you like in the main section, using PBP. The DT interrupts are done in assembly. (No pauses) All you would need is a $2.00 12f683, a capacitor, 3 diodes, and a breadboard.

http://www.picbasic.co.uk/forum/showthread.php?t=12657

[Kenjones1935]

The wall racer code contains subroutines that do all the bang/bang controls by switching DC current through relay DPDT switches

The 16F887 has CCP1 and CCP2 each of which can be controlled by the HPWM Pic Basic Command. I could replace the six subroutines above with six that use HPWM. They would use these two outputs with three pulse widths each.

If I were to add a parameter to each GOSUB command thereby giving more nuance to the pulse width I could command in between wheel speed and steering angle.

Sounds like a piece of cake. What do you think?

Ken