Hi Maarten!
".-2“ is a good idea...I tried "-5" (without the dot), which resulted in a
weird linker error...but ".-2" compiles and links fine and produces good code...
"2$" cannot work, if u have to wait twice within a macro, that uses this USBp
macro (e. g. when u want to poll before a read).
a label that is only valid within the macro would be nice to have, because
counting the bytes of instructions is error prone... :)
Thx.
ByeArne Am Samstag, 17. März 2018, 12:54:48 UTC hat Maarten Brock
<sourceforge.br...@dse.nl> Folgendes geschrieben:
Hello Arne,
I believe you can use a relative offset like this:
mov A,(USB0ADR)
jb (ACC+USBBUSY), .-2 ; . = address of this instruction
Or you can use reusable symbols below 100 (SDCC uses above 100)
2$: mov A,(USB0ADR)
jb (ACC+USBBUSY), 2$ ; . = address of this instruction
Have look in the amslnk.txt documentation 1.3.3 and 1.3.4.
Maarten
> Hi!
> How can I jump within a macro in sdas8051?
>
> I do it like this now:
> .macro USBp
> mov A, (USB0ADR)
> .byte 0x20 , 0xE7 , 0xFB ; jb (ACC+USBBUSY), {to start of macro}
> .endm
>
> but it feels like there should be a different notation... :)
>
> Thx.
>
> Bye
> Arne
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