Hello All,
Is there a way to pass a reference around to a particular PIN in assembly for the SX microcontroller?
I know I can declare a variable such as
But I want to be able to use generic variables such as
to be able to pass "LED_a" to a subroutine using the call command. I'm pretty new at this, so there may be an entirely different method of doing this that I'm unaware of, but what I would LIKE to do is something similar to the following:
Then in my main program use it like this:
Now, I'm not sure if this is even the proper way to attempt subroutines, as I said I'm still learning... but from what I read so far, I couldn't see a way to pass "parameters" to a subroutine directly, and if I use a macro, it will simply replicate that subroutine many times which could be costly in terms of program storage space... is there a better way to call subroutines with parameters?
Also the above code doesn't seem to work since I can't seem to move LED_a or LED_b into _param2, is there a way to accomplish this? Any help would be greatly appreciated
Is there a way to pass a reference around to a particular PIN in assembly for the SX microcontroller?
I know I can declare a variable such as
Code:
LED_a equ RA.0
LED_b equ RA.1But I want to be able to use generic variables such as
Code:
_param1 ds 1to be able to pass "LED_a" to a subroutine using the call command. I'm pretty new at this, so there may be an entirely different method of doing this that I'm unaware of, but what I would LIKE to do is something similar to the following:
Code:
SetLedOutput
cje _param1,#0,color_0
cje _param1,#20,color_1
cje _param1,#50,color_2
cje _param1,#254,color_3
ret
color_0
clrb _param2 ;Hopefully _param2 contains a pin reference
ret
color_1
'some pwm code and conditional
setb _param2
ret
color_2
'some pwm code and conditional
setb _param2
ret
color_3
'some pwm code and conditional
setb _param2
retThen in my main program use it like this:
Code:
Main
mov _param2,LED_a
mov _param1,COLOR1
call SetLedOutput
mov _param2,LED_b
mov _param1,COLOR2
call SetLedOutputNow, I'm not sure if this is even the proper way to attempt subroutines, as I said I'm still learning... but from what I read so far, I couldn't see a way to pass "parameters" to a subroutine directly, and if I use a macro, it will simply replicate that subroutine many times which could be costly in terms of program storage space... is there a better way to call subroutines with parameters?
Also the above code doesn't seem to work since I can't seem to move LED_a or LED_b into _param2, is there a way to accomplish this? Any help would be greatly appreciated