12F683 and DT Instant Interrupts

[jderson]

I am trying to use Darrel Taylor's great Instant Interrupts (thank you!) on a 12F part. Originally, I was using a 12F635. I changed to a 12F683 after reading posts about doing this, because I was under the impression it would work O.K. However, I still get the following message when compiling:

ERROR:Variable wsave2 position request 288 beyond RAM_END 191.

Do I still need to comment out some lines?

@ device pic12f683, INTRC_OSC_NOCLKOUT, WDT_OFF, MCLR_OFF, PROTECT_OFF

OPTION_REG = %11000000
OSCCON = %01100001
TRISIO = %001100
CMCON0 = %00000111
ANSEL = 0
CCP1CON = 0


RATESW VAR BYTE

HIGH GPIO.0
HIGH GPIO.1
HIGH GPIO.4
HIGH GPIO.5
pause 100

RATESW = 0

INCLUDE "DT_INTS-14.bas" ' Base Interrupt System

ASM
INT_LIST macro ; IntSource, Label, Type, ResetFlag?
INT_Handler INT_INT, _SWINT, PBP, yes
endm
INT_CREATE ; Creates the interrupt processor

INT_ENABLE INT_INT ; enable external (INT) interrupts
ENDASM

Main:

if ratesw = 1 then Rate1
if ratesw = 2 then rate2
if ratesw = 3 then rate3
if RATESW > 3 then RESET
GOTO Main

Rate1:

while ratesw = 1
LOW GPIO.0
low GPIO.1
pause 150
high GPIO.0
high GPIO.1
low GPIO.4
low GPIO.5
PAUSE 150
high GPIO.4
high GPIO.5
wend

Rate2:

while ratesw = 2
LOW GPIO.0
low GPIO.1
pause 100
high GPIO.0
high GPIO.1
low GPIO.4
low GPIO.5
PAUSE 100
high GPIO.4
high GPIO.5
wend

Rate3:

while ratesw = 3
LOW GPIO.0
low GPIO.1
pause 50
high GPIO.0
high GPIO.1
low GPIO.4
low GPIO.5
PAUSE 50
high GPIO.4
high GPIO.5
wend



RESET:

RATESW = 0
GOTO Main

GOTO Main

'---[INT - interrupt handler]---------------------------------------------------
SWINT:

while GPIO.2 = 0:wend
pause 100
if GPIO.2 = 1 then
RATESW = RATESW + 1
endif

@ INT_RETURN


Thank you

[mister_e]

Yes, open DT_INTS-14.bas file.. and at the top, you'll discover...

' --- IF any of these three lines cause an error ?? ---------------------------- 
'       Comment them out to fix the problem ----
' -- It depends on which Chip you are using, as to which variables are needed --
wsave1      var byte    $A0     SYSTEM      ' location for W if in bank1
wsave2      var byte    $120    SYSTEM      ' location for W if in bank2
wsave3      var byte    $1A0    SYSTEM      ' location for W if in bank3
' ------------------------------------------------------------------------------

[jderson]

Thank you for the reply. Unfortunately, I have all three lines commented out and now I get "Unable to fit wsave" .

[Darrel Taylor]

From that error, it looks like you're still compiling for the 12F635.

If using MicroCode Studio, make sure the device dropdown box says 12F683.

For the 683, you'll need both wsave and wsave1.

Or you can use the alternate wsave location $70, and comment the other 3.
<br>

[jderson]

Thank you Darrel. Yes , the drop-down was incorrect. The program doesn't work, but that's because it's still Halloween!

[mr.sneezy]

I'm trying to get my head across the DT Interrupt code for a small new RC modeling project and I'm trying a test example first (the blinky LED) , compiling with MCS. I have 12f683 selected in MCS and MPASM being used.

but I get an odd warning message from MCS thus :
Warning[219] d:\pbp code\pbp\pbppic14.lib 336 : Invalid RAM location specified
Warning[219] d:\pbp code\pbp\pbppic14.lib 892 : Invalid RAM location specified

Anybody know why and if I should just disregard it ?

I commented out the wsave lines as required (which led me here BTW)

My code

LED1   VAR  PORTB.1

INCLUDE "DT_INTS-14.bas"     ' Base Interrupt System
INCLUDE "ReEnterPBP.bas"     ' Include if using PBP interrupts

ASM
RBIF = GPIF
RBIE = GPIE

INT_LIST  macro    ; IntSource,        Label,  Type, ResetFlag?
        INT_Handler   TMR1_INT,  _ToggleLED1,   PBP,  yes
    endm
    INT_CREATE               ; Creates the interrupt processor
ENDASM

T1CON = $31                ; Prescaler = 8, TMR1ON
@ INT_ENABLE  TMR1_INT     ; enable Timer 1 interrupts

Main:
  PAUSE 1
GOTO Main

'---[TMR1 - interrupt handler]--------------------------------------------------
ToggleLED1:
     TOGGLE LED1
@ INT_RETURN

My project is quite simple. A 22.5mS interrupt timer (TMR1 I guess) and toggle a few pins then wait for the next interrupt.
Martin