18F2480 asm interrupt

Hi All

I have created an assembler interrupt handler for a PIC18F2480 using the following code.

DEFINE INTHAND InterruptHandler
ASM
InterruptHandler
; ********* Serial Framing Error Interrupt *********
btfsc RCSTA,2 ; check if serial framing error interrupt is set
call _FramingError ; call serial framing error subroutine
; ********* Serial Overrun Error Interrupt *********
btfsc RCSTA,1 ; check if serial overrun error interrupt is set
call _OverrunError ; call serial overrun error subroutine
; ********* Serial Receive Interrupt *********
btfsc PIR1,5 ; check if serial receive interrupt is set
call _ReceiveSerialData ; call receive serial data subroutine
; ********* Serial Transmit Interrupt *********
btfss _TxFlag ; check if serial transmit flag is set
goto InterruptHandlerEnd ; goto interrupt handler end
btfsc PIR1,4 ; check if serial transmit interrupt is set
call _TransmitSerialData ; call transmit serial data subroutine
InterruptHandlerEnd
retfie FAST ; return from the interrupt
ENDASM

My question is, do I need to have my wsave, ssave and psave variables for context saving or does the 18F2480 handle all the context saving and restoring? If I do need context saving, what variables do I need?


Any help would be greatly appreciated.


Thanks

Richard

Yes you need to save the context. Look at the PIC18F2480's data sheet page 128. It even gives you the ASM code to save and restore the context.

Using Darrel Taylor's "Instant Interrupts" would get the job done right the first time.

Thanks for the replies.

Richard