Instant Interrupts - Revisited

[Darrel Taylor]

Bruce,

Thank You, Thank You, Thank You!

But I gotta ask.

Have you tried it yet?
Or does it just Look Cool?

Apprehensively,
  Darrel

[Bruce]

Hi Darrel,

I've tested it on a Lab-X1 with 18F452. Timers 0, 1 and 3 hi-pri. USART rx
low-pri, and it works as advertised...;o}

P.S. I thought this was pretty slick;
movff FSR#v(F)L, fsave#v(F)Pr
movff FSR#v(F)H, fsave#v(F)Pr + 1

[Darrel Taylor]

Excellent!

Thanks for that.

And, yeah. The "Text Substitution" comes in pretty handy.
A bit Cryptic looking, but it is "Slick". Finding more uses for it with each new program.
<br>

[mister_e]

Darrel,
i'm developping an USB device to be release within let's say a year if everything work as expect. I have to use few interrupts source(4 as now.. but it grows). Today i decided to implement the instant interrupt in. All i can say is that it really reduce the latency. Worked well before... by far better now. You really save me to spend hours in the asm developpement...

Anyways i'll probably have no choice to use asm if i really don't want to move to the DsPIC. It's still in developpement so far.

Thanks!

[Darrel Taylor]

Sounds great Steve,

Were you using ON INTERRUPT before? or ASM?
<br>

[mister_e]

On interrupt first.. thereafter trying to do a real pure assembler ISR wich was a real improvement but didn't finished to implement/debug all of them 'cause you bum decide to stop me and release the 18Fs version and worst for FREE!

I may want to waste my time one day to do a pure asm ISR and compare both... but not for now as it's work really fine and i'm still unsure of the real final requirement 'round this device. You know how it is.. sometimes we see it bigger than it have to be

i'll keep you post anyways!

[b1arrk5]

I tried it, played with it for over three hours, nothing but compilation errors. I'm using Picbasic Pro 2.46 and MPASM 5.03. Any ideas?