PBP projects for R/C models

[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

[Kenjones1935]

Thanks everyone for working on the RC PWM problems.

Meanwhile I have built a autonomous toy car from the ideas voiced by fritsl in Lets Built Robots.

The DPDT switches work. I have two separate battery packs. The power for the servo and the wheels shares nothing with the power for the PIC and other logic. Not even the ground circuit! This should keep the noise down.

I am using the LED's on the PICkit2 to help debug. At least I can know which routines have been visited. I wish I could figure out a way to know what are in my variables. The USB programmer can read and write all memory locations. Where do I read about real time debugging?

Oh, yes, my new PIC16F887 book arrived via air mail at the Fitchburg, MA Post Office. It is published by MIKROELEKTRONIKA d.o.o in Belgrade, Serbia. How small the world has become.

[Kenjones1935]

That's the word I have been looking for.

Is there a mechanism in PBP for setting break points.

Once that is done, is there an easy way using PICkit 2 Programmer to read the contents of a particular register?

Ken

[Kenjones1935]

I see in the PICkit 2 Programmer HELP menu discussion of the Debugger tool. Part of MPLAB IDE.

Trouble is, the programmer in MPLAB seems to not get along with the programmer in PICkit 2. I have not been able to make hide nor hair of MPLAB IDE. I have been using Microcode Studio PBP and PICkit 2 programmer.

What am I missing?

KEn

[Kenjones1935]

My PICkit 2 PORTB outputs do not consistently pull up the coils in the DPDT relays enough to activate them.

The 16F887 outputs measure 2.8v to 3v when driving a coil. I did not find mention of this potential problem in the PICkit2 Manual.. Any ideas anyone?

Is there another Microchip kit that has some output drivers?

Ken

[rmteo]

According to the data sheet, the output high voltage is VDD-0.7 (4.3V with 5V supply) when sourcing 3mA. The absolute max. current sourced/sunk by any I/O pin is 25mA. What does your relay require to activate?

[Kenjones1935]

My ZETTLER AZ8222-2C-5DSE spec says:
Nominal Coil VDC 5 volts
Coil Resistance 125 ohms
Must Operate VDC 3.8 volts.

3.8/125 = 30ma

One relay works out of six when driven by a PORTB output.

NUTS!

Ken

[ScaleRobotics]

That's the word I have been looking for.

Is there a mechanism in PBP for setting break points.

Once that is done, is there an easy way using PICkit 2 Programmer to read the contents of a particular register?

Ken

The easiest way is to have your project do serial out using the debug statements. With your PicKit you can read the output using the uart tool. Using if then statements, you can set it to give you different information. I use this in trouble shooting a lot.