NCO Calculator

[Mike, K8LH]

Hi mpgmike:

At the risk of seeming like a troll, may I make a couple suggestions, just in case you ever revisit your NCO Calc program, please?

(1) Allow entry of NCO Frequencies such as 8388608-Hz without rounding.
(2) Correct the NCO bit width constant (2097152) in your calculations.
(3) Display the NCO frequency resolution.
(4) Display the output frequency error.

I whipped up a quick spreadsheet to highlight the calculation problems I'm experiencing. Your NCO Calc app' introduces errors by rounding the NCO frequency and by using the incorrect NCO bit width constant in your calculations.

Have fun. Best wishes. Cheerful regards, Mike, K8LH

[Ioannis]

Isn't easier all these calculation done in a Excel file?

Ioannis

[mpgmike]

Thoughts I never thought. There are 2 modes for NCO, toggle (the one used) and a pulse-out, which yields 2X the frequency output of toggle mode. I had thought of possibly adding calculations for pulse-out mode.

[Mike, K8LH]

Isn't easier all these calculation done in a Excel file?

Ioannis

A spreadsheet is easier to make but I don't think it's easier to use. Mike's stand-alone app' is a seriously cool accomplishment. Personally, I'd rather use a small stand-alone app' instead of a spreadsheet.

Many years ago I built an SPBRG Calculator spreadsheet followed by an SPBRG Calculator app' written in JustBASIC. I much prefer using the app'.

Cheerful regards, Mike, K8LH

[richard]

if only pbp was still being kept relevant, all these things and more are built into mplabx and easy to use

[mpgmike]

I forced myself to work with MPLABX over the past few days. I needed a combination of features only found in the PIC16F18426, which is too new for PBP3. I'm building the software in ASM using MPLABX. I like the Debug feature. As I'm not that familiar with ASM, the Debug showed me where I got stuck in an endless loop and helped me catch a few other problems in my code. It's taking me about 10X longer in ASM than it would in PBP3, but I'm learning a bunch through the experience.

[Ioannis]

You are a herο! Two times, for ASM and MPLABX!

I started using PIC with plain ASM coding but never go back again.

Ioannis

[Mike, K8LH]

Anyone know if mpgmike ever fixed the errors and updated his nco calculator app'?