Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Fri, 9 Jul 2010 15:13:33 -0500

Hi Pawel,

On Friday 09 July 2010 13:53:04 [email protected] wrote:
>
> record(sub,"$(user):stopsub") {
>   field(DESC,"SimpleTest")
>   field(INAM,"SubInit")
>   field(SNAM,"TestPrint")
>   field(INPA,"$(user):goSub0.VAL")
>   field(INPB,"$(user):goSub1.VAL")
> }
>
> The question is, having the TestPrint function:
>
> long TestPrint(struct subRecord *psu) {
>
> 	return 0;
> }
>
> how can I determine which button was pressed? I wanted to check both
> inputs and see which goSubx.VAL == 1 but I don't know how to get to the
> biRecord pointer using the subRecord pointer. Is there any way to do this?

You're not supposed to access the bi records directly, but the two input links 
INPA and INPB of the sub record will have already read in the VAL fields of 
those records before TestPrint() gets called.  Your function can access the 
values read at prec->a and prec->b respectively, and can also set prec->val or 
any of the other prec->c through prec->l variables (the ones that don't have 
their links set) to export any results.

HTH,

- Andrew
-- 
The best FOSS code is written to be read by other humans -- Harald Welte

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System