PBP projects for R/C models

[Kenjones1935]

Scalerobotics:

I used the oscilloscope you gave me way back when. You are correct. The PWM signals appear to be there from the get go, but the wheels neither rotated nor steered until the program counter got past 'main:'.

The pulse traces on the scope are stable and easily readable.

All my fault - nothing new there - just between us programmers. I thought I had set PORTC.0 low with a TRISC = %11110000 when in fact I had set it to be an output. This is the pin that drives the DPDT switch that selects between PIC control and radio receiver control. Once I activated the LOW portc.0 located just before the HPWM commands. Lo and behold!

Thank you for your patience and smarts.

Ken

[Kenjones1935]

One of you knowledgeable people please come to my aid.

I am studying the .ASM code which my PBP produces. My Microchip 16F887 Data Document DS41291F page 232 lists the Assembly Language commands for the 16F88x chips. There is no HPWM in that list. Yet my .asm code contains:

HPWM?CCC 001h, _Right, 032h

How does the Assembler know what to do with that string?

I figured it must be in one of the includes. I searched all the files in the PBP directory, the Mecanique directory and the Microchip directory for the string HPWM. No luck except in my .pbp code that I wrote and its resulting .asm.

This is not a show stopper, but I would like to know what I am missing.

On the very good news side, MIT's Lincoln Laboratory has an Educational Outreach initiative. They have picked up the idea of racing robocars. I am sure that they will take this to the next level - whatever that is.
Ken

[mackrackit]

HPWM?CCC 001h, _Right, 032h

How does the Assembler know what to do with that string?

In the PBP directory there is a file , pbppi14e.lib , that has the macros.

[Kenjones1935]

Thank you Mr/Ms Mackrackit

pdppi14e.lib catches all my questions (for example how does PAUSE work) except one. HPWM is nowhere to be found. I know it is a hardware feature (whatever that means). Somehow the assembler has to know how to translate it into .hex.

All in all, as I said, my robocar project is progressing. Anybody got any ideas what other kind of do it yourself robots might hook middle school students?

Ken