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'[PIC] Some questions about 18f4539 and ProMPT moto'
2005\12\17@180326 by Peter van Hoof

face picon face
Hi all,

This time around with the right tag ( Might actually get me an answer )
I bought some 18f4539 chips with built in motor controller kernel
before really reading all of the data sheet and now have some problems.

I have no idea how to call the prompt functions in C. I am using sourceboost
IDE BoostC compiler. I just cant find all relevant info I suppose I need entry
addresses of all functions but I just cannot find this info. I checked all files
in their app notes for any clues.

Does anyone have any experience with this?

A second question: The data sheet mentions that though registers for the
2 PWM modules are described they can only be used by the motor control
kernel. Is this true even if the kernel is never called or initialized?

Thanks in advance for any info

Peter van Hoof



'[PIC] Some questions about 18f4539 and ProMPT moto'
2006\01\02@221926 by Peter van Hoof
face picon face
Replying to myself to possibly save others the same aggravation

----- Original Message ----
>From: Peter van Hoof spam_OUTpvhoofTakeThisOuTspamyahoo.com


>I bought some 18f4539 chips with built in motor controller kernel
>before really reading all of the data sheet and now have some problems.

>I have no idea how to call the prompt functions in C. I am using sourceboost
>IDE BoostC compiler. I just cant find all relevant info I suppose I need entry
>addresses of all functions but I just cannot find this info. I checked all files
>in their app notes for any clues.

>Does anyone have any experience with this?

>A second question: The data sheet mentions that though registers for the
>2 PWM modules are described they can only be used by the motor control
>kernel. Is this true even if the kernel is never called or initialized?

I have tried the piclist, the microchip forum, and even opening a support ticket
with Microchip all without a meaningful answer. As far as I understand the
18Fxx39 series was only a temporary solution from Microchip to address the
fact that they did not have a motor controller chip ready. After completing the
design of the 18Fxx31 interest in this product faded.

The tech replying to my support ticket didn't seem to have much info available
about it.

Anyway, after searching for documentation for a long time I finally stumbled upon
PRMTX439.asm and PRMTX539.asm of the latest installation of the c18 compiler
at C:\MCC18\src\traditional\pmc\ProMPT from which it is clear how to call the
prompt functions.

I hope this info has some value, a lot of these chips are sold on eBay at
the moment.

YMMV

Kind regards
Peter van Hoof


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