PCW CCS: Return from assembly function ?

pcw ccs

Hi,

I have a assembly function like that

void myfunc (void)
{

#asm
" // my assembly lines
"
return
"
"
return
#endasm

}

I want to know how can i return from the assembly function .
I tried the __return__ found it in the manual.
But it give me this error
And how can i return with a value in assembly function ?

Thanks

pcwh assembly

And how can i return with a value in assembly function ?

Click to expand...

You could define a local (or even a global) variable in your program say an int8, you can use `C' variables from within inline assembly code.


What version are you running? There seems to be one update per week (sometimes even more).

- Jayson

Pharaoh of Egypt said:

I want to know how can i return from the assembly function.

Click to expand...

I don't think you can return a value when you use void.

Instead of:
void myfunc (void)
it should be something like:
int8 myfunc (void)

Pharaoh of Egypt said:

I tried the __return__ found it in the manual.

Click to expand...

According to the manual the correct command is _return_ wiht only one underline character at the ends and not two as you wrote: __return__

Pharaoh of Egypt said:

But it give me this error

Click to expand...

Which error? You forgot to write.

Here is an example from the manual, it should be straightforward to use I think.

int find_parity (int data) {
int count;
#asm
movlw 0x8
movwf count
movlw 0
loop:
xorwf data,w
rrf data,f
decfsz count,f
goto loop
movwf _return_
#endasm
}

I can use _return_ function in line

int cf_read()
{
cf_data_tris = tris_d_in;
output_low(cf_n_oe);
_return_ = cf_data;
output_high(cf_n_oe);
}

it work!!!

Hi,

Ok i knew why _return_ doesn't work
Becuse i put in my code #CASE statment.
and i wrote _return_ in lower case letters
This is the bug
If i used #case i should write it in upper case letters _RETURN_
becuse if you looked for .LST file in symbol table area you will find _RETURN_ in upper case letters.

Thanks for your try
Bye
Pharaoh Of Egypt