Delay without using pause

[stanon1]

THANKS TO YOU ALL FOR TRYING TO HELP.

I have thrown together some wobbly code to try and explain what i'm trying to do.

I know it might not be the best way, but i can't seem to wrap my head around the whole idea. I just want to be able to use pause in a way that I won't sit and wait for the time to elapse.

in the mainloop here, i have 4 blocks (which could be doing many different things aside from toggling pins). Each block has a pause somewhere set by the value loaded in DELAYREGx

Then in the ISR INTERUPTING EVERY 1ms;

MYISR1:
IF DELAYREG1>0 THEN
DELAYREG1=DELAYREG1-1
IF DELAYREG1=0 THEN
DELAY1flag=1
ENDIF
ENDIF

IF DELAYREG2>0 THEN
DELAYREG2=DELAYREG2-1
IF DELAYREG2=0 THEN
DELAY2flag=1
ENDIF
ENDIF

IF DELAYREG3>0 THEN
DELAYREG3=DELAYREG3-1
IF DELAYREG3=0 THEN
DELAY3flag=1
ENDIF
ENDIF

IF DELAYREG4>0 THEN
DELAYREG4=DELAYREG4-1
IF DELAYREG4=0 THEN
DELAY4flag=1
ENDIF
ENDIF

; END OF ISR
;

Then in the mainloop,

MAINLOOP:

BLOCK0:

IF LED0_UPDATE THEN
HIGH PORTB.0 ;IS IT TIME TO UPDATE LED0?
@ myPAUSE 1000,1 ;MAKE PORTB.0 HIGH FOR 1000 ms USING DELAYREG1
LED0_UPDATE=0 ;BUT DON'T WAIT FOR THE TIME TO ELAPSE
GOTO BLOCK1
ENDIF

IF DELAY1flag THEN ;WILL BE SET IN THE ISR ATFTER 1 SECOND
LOW PORTB.0 ;HAVE WE COME TO THE END OF 1 SECOND?
ENDIF ;END OF myPAUSE


BLOCK1:

IF LED1_UPDATE THEN
HIGH PORTB.1 ;IS IT TIME TO UPDATE LED1
@ myPAUSE 4000,2 ;MAKE PORTB.1 HIGH FOR 4000 ms USING DELAYREG2
LED1_UPDATE=0 ;BUT DON'T WAIT FOR THE TIME TO ELAPSE
GOTO BLOCK2
ENDIF

IF DELAY2flag THEN ;WILL BE SET IN THE ISR ATFTER 4 SECOND
LOW PORTB.1 ;HAVE WE COME TO THE END OF 4 SECOND?
ENDIF ;END OF myPAUSE

BLOCK2:
IF LED2_UPDATE THEN
HIGH PORTB.2 ;IS IT TIME TO UPDATE LED2
@ myPAUSE 2000,3 ;MAKE PORTB.2 HIGH FOR 2000 ms USING DELAYREG3
LED2_UPDATE=0 ;BUT DON'T WAIT FOR THE TIME TO ELAPSE
GOTO BLOCK3
ENDIF

IF DELAY3flag THEN ;WILL BE SET IN THE ISR ATFTER 2 SECOND
LOW PORTB.2 ;HAVE WE COME TO THE END OF 2 SECOND?
ENDIF ;END OF myPAUSE

BLOCK3:
IF LED3_UPDATE THEN
HIGH PORTB.3 ;IS IT TIME TO UPDATE LED3
@ myPAUSE 400,4 ;MAKE PORTB.3 HIGH FOR 400 ms USING DELAYREG4
LED3_UPDATE=0 ;BUT DON'T WAIT FOR THE TIME TO ELAPSE
GOTO BLOCK0
ENDIF

IF DELAY1flag THEN ;WILL BE SET IN THE ISR ATFTER 0.4 SECOND
LOW PORTB.3 ;HAVE WE COME TO THE END OF 0.4 SECOND?
ENDIF ;END OF myPAUSE

GOTO MAINLOOP

Here is what i mean by using pbp within ASM macro;

ASM
MACRO myPAUSE msec,subID
movlw msec
movwf delay_temp
movlw subID
movwf KeepTrack
ENDASM

SELECT CASE KeepTrack

CASE 1
DELAYREG1=delay_temp
DELAY1flag=0

CASE 2
DELAYREG2=delay_temp
DELAY2flag=0

CASE 3
DELAYREG3=delay_temp
DELAY3flag=0

CASE 4
DELAYREG4=delay_temp
DELAY4flag=0

CASE ELSE

@ NOP
END SELECT

@ ENDM

I hope someone might understand and help me...

thanks.

[Dave]

Stanon1, I see where you are clearing: LED0_UPDATE=0 but where are you setting it to TRUE? I think you are on the right track but it could be made much more simplistic.

[stanon1]

Exactly! It could be made simpler. That is the crux of the matter.

You are right i didn't show where i am setting LED0_UPDATE. these flags themselves, at the right time based on certain parameters, are set by other isr running in parrallel with the heartbeat timer

thanks for the reply

[amgen]

I can suggest a little different approach which I have used...... its similar to how operating systems work ... and since you are using interrupts, you already are doing most of the work...
I will explain more unless your intent on proceeding with what you have been doing.
don

[stanon1]

I can suggest a little different approach which I have used...... its similar to how operating systems work ... and since you are using interrupts, you already are doing most of the work...
I will explain more unless your intent on proceeding with what you have been doing.
don

hi amgen, pls any suggestions you have is welcome. my aim was to let you guys understand what i'm trying to do; i am not good at coding so that is where i need help: how best to go about it to get the expected results... i will be glad if you would explain

[amgen]

before adding your code, set up a real time loop with interrupt every 100 milliseconds (that gives 10 times per second and allows for many microsecond instructions to run within main timing loop) don't use any pauses....just set/start/check counters in loop sections as each pass is exactly .1 seconds.
So program runs main loop including your individual code parts..... then waits at the bottom in a while command until the interrupt sends it back to main loop ......
as long as all your code operates within 100 milliseconds (that's many 1 and 2 microsecond machine code instructions) then the loop will always wait until retriggered after looping through your code in the while loop.
You set up a few flag type bits or bytes that get set/reset/checked for program flow.
sorry if explanation is messy.
First get the main .1 second loop working (blink/toggle an led as an indicator) then add in your code relying on the .1 second looping time.


http://www.picbasic.co.uk/forum/asse...1&d=1311957346