CRYPTINT

CRYPT_INT -- KeeLoq Cryptographic


Uses PIR1,CRIF, PIE1,CRIE Registers and Control Bits.
DT's Interrupts MUST be used with PicBasic Pro and MPASM.

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,( _SndData). All instruction to the interrupt processor should be in ASM and preceded by the @ symbol and to the far left column of the editor if not included in other ASM code blocks.
Example:
@ INT_DISABLE CRYPT_INT

ASM

 INT_LIST     macro     ;IntSource      Label,    Type,    ResetFlag?
            INT_Handler   CRYPT_INT    _SndData   PBP       Yes
            endm
            INT_CREAT               ;Creates the interrupt processor
            INT_ENABLE   CRYPT_INT  ;enables CRYPT interrupts

ENDASM

Command functions:
INT_CREATE ;Creates the interrupt processor
INT_ENABLE CRYPT_INT – enable CRYPT interrupt
INT_DISABLE CRYPT_INT – disable CRYPT interrupt.
INT_CLEAR CRYPT_INT – clear flags
INT_RETURN ---------- To restore and return to the program where interrupt was made.



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