PIC24 and FSR2 / POSTINC2

[Coccoliso]

Hello,
anyone know how to give a straight replacement of SFR2 / POSTINC2 in FW and PIC24?
From an application note talking about Wn ++
In FW is direct access to Wn?
Can anyone give me an example?
Many thanks to the "samaritan".

I tried to give me an answer but I'm dubious about the SAVE RESTORE mechanism.

The literal translation from SF:

Code: Select all

  Save(FSR2)
    FSR2 = pBufAddr
    While len > 0
        SPI.WriteByte(POSTINC2)
        Dec(LEN)
    End While
    Restore()


.. in FW is this ?

Code: Select all

    Addr0 = AddressOf(pBufAddr) 
    While len > 0
        SPI.WriteByte(*(Addr0+))
        len -= 1
    End While


.. and always in FW accordingly as above:

Code: Select all

    Addr0 = AddressOf(pDest)
    While len<>0
        len -= 1
        *(Addr0+) = CByte(value)
    End While


[David John Barker]

There is a little reference guide at the bottom of this thread:

http://www.firewing.info/forum/viewtopic.php?f=7&t=39&p=190

showing how to use Addr0, Addr1 and Addr2. Using these constructs ensures portability between PIC18, PIC24 and PIC32. The PIC24 and PIC32 devices do not have the equivalent POSTINC registers. You have to shell out to ASM if you want to manipulate an address register directly.