Causing a Trap effect for Address Error

[kingGrey]

Hi there,


I have tried to create an address trap scenario, but I have been unsuccessful. I might be doing something wrong... I was however able to use the Math error trap and I see how that works.

Could someone please show me a sample code for doing this for address Error trap.
this is the trap function i have:

Code: Select all

                         'Addr ERR
Sub procedure TrapTrap1  org $0008
  INTCON1.3 = 0
  LATB = $A0A0
  asm
     MOV [w15 - 32],w13
     MOV w13 LATD
  end asm
   Uart2_write_Text("ADDR ERROR" +  chr(13) + chr(10))
End Sub

but somehow its not being triggered....

Help Please

[zristic]

Code: Select all

                         'Addr ERR
Sub procedure TrapTrap1  org $0008
  INTCON1.3 = 0
  LATB = $A0A0
  asm
     MOV [w15 - 32],w13
     MOV w13 LATD
  end asm
   Uart2_write_Text("ADDR ERROR" +  chr(13) + chr(10))
End Sub

You are missing a coma character in the second asm line, between W13 and LATD.

In order to trigger the trap you have to perform word access to an odd address, something like this:

Code: Select all

asm
  mov #123, w0
  mov [w0], w1
end asm

There are also other situations which cause address trap, for more information see the document titled "dsPIC30F Family Reference Manual", Chapter 6.2.2.2.

[kingGrey]

Thanks for your help, i appreciate it