Paul & Sabrina's cheap DIY 144v motor controller - Page 673 - Fuel Economy, Hypermiling, EcoModding News and Forum

Astro · 07-21-2014, 03:06 AM

Quote:

Originally Posted by jedsmd

Interesting
When I load the program, with the controller in the truck, using the Pickit 3, Mplab cannot see the chip unless the controller power is on. I just thought that was the way you were supposed to do it.

I don't yet have one of Paul's fantastic controllers so can't say for sure. The circuits i am messing about with are for a BMS so still a PIC but a different model.
I assumed the In Circuit Programming would be the same for all but maybe not.
There may be too much circuitry on the 5v rail for the pickit3 to power it so powering the circuit and using the pickit3 to program but not supply power may be the only way to go.

Paul, which method did you use? Did you try both?

flores · 07-21-2014, 06:18 AM

I always thought the circuit must be powered down.. because other components could interfere. So I never tried it powered on.

MPaulHolmes · 07-21-2014, 09:54 AM

I always just turn the DC-DC power on. I didn't even know that the pickit had its own power as an option!

flores · 07-21-2014, 02:50 PM

Quote:

Originally Posted by flores

I'm trying to get that rs232 shield working but fail miserably.. I don't get it.. it's just a simple max232

Okay, turns out that I needed to swap rx and tx.. it works now.. next up.. connecting the raspberry

flores · 07-21-2014, 05:26 PM

Paul, is the throttle reversibility configurable now? Or I'm I stuck with an inversed throttle since the new firmware?

MPaulHolmes · 07-21-2014, 05:57 PM

Haha no, for now I just made 2 separate hex files. Yours is the regular 0-5k means zero to full throttle. I was trying not to change too many things at once.

flores · 07-22-2014, 02:58 AM

Quote:

Originally Posted by MPaulHolmes

Haha no, for now I just made 2 separate hex files. Yours is the regular 0-5k means zero to full throttle. I was trying not to change too many things at once.

Then I think I got the wrong one.. since flashing it is reversed.

MPaulHolmes · 07-22-2014, 10:56 AM

Oh my gosh. Let me go see what I did. I'm so sorry.

flores · 07-22-2014, 03:08 PM

So.. hardware side of things work.

Here you see a putty session on the raspberry capturing the rtd data.. how cool is that:

And this is the setup:

The controller is connected to the shield with the max232, that has a voltage divider on the tx to bring it down to 3.3v and that is connected to the raspberry

flores · 07-22-2014, 03:42 PM

Here I am running my own c# mono program giving the controller the config command..

Now I have to wire this to a webserver on the raspberry