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GMP
Joined: 22 Sep 2003
Posts: 2
Location: Rosenberg, TX
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| How can I #ORG 0x0004? |
 Posted: Fri Jan 16, 2004 5:10 pm |
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I would like to place my own ASM code for the ISR handler.
i.e.
| Code: | #ORG 0x0004 // this is the interrupt vector (all interrupts)
void isr_complete()
{
#asm
// store W and Status
MOVWF W_TEMP
SWAPF STATUS,W
CLRF STATUS
MOVWF STATUS_TEMP
// check that it is EXT
BTFSS INTCON,4
GOTO ISR_End
BTFSS INTCON,1
GOTO ISR_End
.
.
ISR
.
.
ISR_End:
MOVWF STATUS
SWAPF W_TEMP,F
SWAPF W_TEMP,W
RETFIE
#endasm
} |
Does anyone know how I can set the compiler so I do not get an 'out of range' error?
I do not want to do everything that PCM is doing. This is for a 16F876A.
Thanks,
Grant |
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Felix Althaus
Joined: 09 Sep 2003
Posts: 67
Location: Winterthur, Switzerland
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| Posted: Sat Jan 17, 2004 4:11 am |
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Hi
Use the #int_global directive:
#int_global
void isr_complete()
{
...
}
Here, the compiler doesn't generate any code (just a single 'retfie' at the end, I think).
mfg
Felix |
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