HPWM10 Frequency Updating

[Darrel Taylor]

Duncan,

Now that you are using PBPL, things get very easy.

PBPL does not have the 32767 upper limit like PBPW.
The resolution is only 8-bit max. But you don't need resolution, just frequency @~50% duty.
And, it's not glitch free, but if you only change the frequency when you need to, it shouldn't be a problem.

Freq  VAR LONG

Freq = 500000

HPWM 1, 127, Freq

Should do it. I think.
<br>

[duncan303]

Thanks Darrel for directing me back away from HWPM10.

Unfortunately using PBP’s HWPM even with LONG has noticeable inconsistencies across the range I am interested in,exactly as you suggested, so I have gone back to calculating PR2 myself, which is so much easier without DIV32.
I have also chosen to make use of the listing file which I have set to create at compile time, from which I hope to learn more how PBP creates assembly, as it is made so much easier by the explanation comments.



I would like to add some personal observations concerning another post today elsewhere on the forum.

Earlier in this thread I asked permission to alter code created by others for my own use. I personally do not feel comfortable cutting and pasting other peoples routines into code, I always know it is there, especially if I know I could never have written it myself.

This is a complex forum with diverse users and some big contributors are understandably feeling that they are being taken advantage of. I do not doubt for one minute that this is not true, as I believe that there are strong commercial undercurrents in the mix.

A little while ago this forum was down for a day or so, I can remember staring at the screen like a frightened rabbit……………perhaps if I had actually joined in…………….so I have started to post.

Anyway guys and gals please don’t stop helping, in whatever frame of mind. I have actually found some of the recent interchanges very funny, and on behalf of those a bit timid to post...
thank you all collectively again.

Perhaps I can help out a little by referring to our old friend the DATASHEET and in particular Section 26.0 Emotional Characteristics, paying special attention to page 232 ABSOLUTE MAXIMUM RATINGS.

HTH

Duncan