Hi.

I have a feeling that I'm not going to be able to do this the way I want to, but I thought I'd see if anyone here had any suggestions.

I'm building a unit that sends various commands to another piece of hardware after having formatted them. Currently the commands to send are stored within code, and are selected as below by hard-coded mov dptr statements.

What I would like to be able to do is to send the unit itself commands which it then interprets and selects the relevant command (I want to obfuscate the interface, so I still want to store the commands in code, just change the way I select them).

To clarify, in the code below where it has the line

mov dptr, #COMMAND1

If I could I would send COMMAND1 to the unit and it would format and send COMMAND1. If I sent it COMMAND2 it would format and send COMMAND2. Of course, I can't use a label in that way, but is there an alternative?

Thanks,

Rob.

snip-----------------------------snip

        mov dptr, #COMMAND1 ;This is the line I want to change
	call FORMAT_DATA_BLOCK
	call SEND_DATA

snip-----------------------------snip


snip-----------------------------snip
FORMAT_DATA_BLOCK: 

CLR A
	mov R1, #SEND_BUFFER ;location in databuffer
	movc a,@a+dptr
	mov R0, a            ;R0 is length of data 
	inc dptr
	
LOOP:
	clr A
	movc a,@a+dptr
	mov @R1, a 
	Inc R1
	inc dptr
	djnz R0, LOOP

...     ;Code here to format data
...

RET

snip-----------------------------snip

snip-----------------------------snip

COMMAND1: db 6, 00h, 01h, 02h, 03h, 04h, 05h
COMMAND2: db 7, 00h, 02h, 04h, 06h, 08h, 0Ah, 0Ch

snip-----------------------------snip