Matrix Keypad routine

[mister_e]

Nope, i have no idea and no plan to do it.

I NEVER use PM, it really don't worth to use it anyways... sorry

[Darrel Taylor]

I know of NO reason why anyone should still be using PM.

If you don't use ASM then it'll handle PBP just fine. But if you do use ASM, PM will cause nothing but problems. I never use it anymore either.

However, before I found out how much better MPASM is, I used PM for a year or 2, and am probably more familiar with it than Steve.

So here's Steve's Kepad.bas, modified to work with PM.exe

This version will NOT work with MPASM

Don't forget to remove the .txt extension.

HTH,

[T.Jackson]

Looks good Steve. Worth a vote *****

[mister_e]

i has the advantages to be 'user configurable' and support many matrix Keypad type... up to 8X8.

Can be used in a Timer interrupt as well, so you can read from it when you want, etc etc.

Enjoy!

[T.Jackson]

It looks quite comprehensive.

I tend to base most of my algorithms around direct logic - boolean algebraic structures - rather than continuous mathematics, i.e calculations. PIC's are not as well equipped for calculations.

[mister_e]

If that was true... ASM additions, substraction, bit shifting functions and few STATUS register bits wouldn't exist...(carry/Borrow, Z)

[T.Jackson]

If that was true... ASM additions, substraction, bit shifting functions and few STATUS register bits wouldn't exist...(carry/Borrow, Z)

So, you believe that a PIC performs on par with: A = (100 / I) + (J * 2) Vs IF B = 1 THEN A = 120 ?
Huge amount of work for the PIC to do something like this: A = (100 / I) + (J * 2)
100 x the num of clock cycles perhaps?

[charudatt]

I know of NO reason why anyone should still be using PM.

If you don't use ASM then it'll handle PBP just fine. But if you do use ASM, PM will cause nothing but problems. I never use it anymore either.

However, before I found out how much better MPASM is, I used PM for a year or 2, and am probably more familiar with it than Steve.

So here's Steve's Kepad.bas, modified to work with PM.exe

This version will NOT work with MPASM

Don't forget to remove the .txt extension.

HTH,

Thanks Darrel.

Unfortunately I still use PM and maybe I am facing all problems because of that. I shall shift over to MPASM and see the difference.

Today my biggest problem is to get a 16F628A to sleep and wake it on INT on Change B4...B7. This is in conjuction with a keypad rotuine I am working on for a keylock project.

I think I must change over and see (experience) the difference myself

Thank you steve for this wonderful thread.

regards