DTINTS-14

List of Interrupts based on DT_INTS-14 vers.1.1; GPC_INT, IOC_INT, RAC_INT, RABC_INT and the original RBC_INT are all forms of Port Change Interrupts. The chip being programmed determines which one you need to use.

The following INCLUDE files should be near the beginning of your program. There are other INCLUDE files for special functions which will be discussed in the appropriate location.

DT's Interrupts MUST be used with PicBasic Pro and MPASM.

'INCLUDE "DT_INTS-14.bas"' for 14bit devises
INCLUDE "ReEnterPBP.bas

NOTE: DT_INTS-14 and ReEnterPBP needs 31 bytes of Ram with DT_INTS-14 using 7 bytes.

INT_ENABLE xxx_INT ;to enable interrupt after handler is created.
INT_CLEAR xxx_INT ;clear interrupt flags bits
INT_DISABLE xxx_INT ;clear interrupt enable bits
INT_RETURN ;to restore interrupt and return to the program location where interrupt was made.



The following variables are located at the beginning of DT_INT-1x.bas. Copy them to your main program. The compiler will instruct you as to what should be done, if anything, once you compile. DO NOT make changes in DT_INT-1x.bas program.

wsave var byte $20 system ;location for W if in bank0
wsave var byte $70 system ;location for W if in bank0
..... If any of these next three lines cause an error ...Comment them out to fix the problem...
............which variables are needed, depends on the chip you are using.......
wsave1 var byte $A0 system ;location for W if in bank0
wsave2 var byte $120 system ;location for W if in bank0
wsave3 var byte $1A0 system ;location for W if in bank0


The following block of instructions will establish the interrupt used and the PBP label (your ISR) to jump to once interrupt occures. Remember; all PBP lables or variables used inside ASM code blocks must be preceded by the underscore,( _ToggleLED1). After creating the interrupt processor all instruction to the processor should be in ASM and preceded by the @ symbol and to the far left column of the editor if not included in ASM code blocks.
@ INT_DISABLE INT_INT

INTerrupts Execution Order:
ASM

 INT_LIST     macro     ;IntSource      Label,    Type,    ResetFlag?
            INT_Handler   INT_INT    _ToggleLED1   PBP       Yes
            endm
            INT_CREAT              ; Creates the interrupt processor
            INT_ENABLE    INT_INT  ;enables external (INT) interrupts

ENDASM
NOTE: Make sure IN_Handler, INT_CREAT, and INT_ENABLE are indented!

Multiple interrupts may be used.
ASM

 INT_LIST     macro     ;IntSource      Label,    Type,    ResetFlag?
            INT_Handler   INT_INT    _ToggleLED1   PBP       Yes
            INT_Handler   TMR0_INT   _TimeOut      PBP       Yes
            INT_Handler   TMR1_INT   _TimeOut2     PBP       Yes
            endm
            INT_CREAT              ; Creates the interrupt processor
            INT_ENABLE    INT_INT  ;enables external (INT) interrupts

ENDASM

NOTE: Up to 14 separate INT_Handler's can be in the LIST.