The error is on this line (I think):
double ran0(long &idum)
where the syntax should be:
double ran0(long *idum)
if you mean you are passing a pointer to a double value.
But I think ints are 16 bits and doubles and floats
are both 4 bytes so your calculations will probably
not be what you want.
MS
Lakshmi Pradeep wrote:
>
> Hi ,
> Thanks for your reply.I am attaching that code below .
> Could you please check it for me ? BlinkM is a code for checking
> a random number generation .Function ran0 returns a random number
> between 0.0 and 1.0. This function works in C.
> I am working with moteworks platform,mib520 programming board ,micaz
> motes . I got this error on executing this code in nesC.
>
> BlinkM.nc:29 syntax error before '&'.
> make: *** [exe0] Error1
>
> If generated value(val) is less than 1.0 the red led must toggle.
> Is the all bitwise operators used below works with nesC? Please give me
> a reply.
>
> ....................................................................................Code..........................
> module BlinkM {
> provides {
> interface StdControl;
> }
> uses {
> interface Timer;
> interface Leds;
> }
> }
> implementation {
>
> long val,tn;
> long idum=21;
> long p=0.5;
>
>
> command result_t StdControl.init() {
> call Leds.init();
> return SUCCESS;
> }
> command result_t StdControl.start() {
> // Start a repeating timer that fires every 1000ms
> return call Timer.start(TIMER_REPEAT, 1000);
> }
> command result_t StdControl.stop() {
> return call Timer.stop();
> }
>
> double ran0(long &idum)
> {
> const int a=16807,m=2147483647,q=127773;
> const int r=2836,MASK=123459876;
> const double am=1./m;
> long k;
> double ans;
>
> idum^=MASK;
> k=(idum)/q;
> idum=a*(idum-k*q)-r*k;
>
> if(idum<0)
> idum+=m;
> ans=am*(idum);
> idum^=MASK;
> return ans;
> }
>
> event result_t Timer.fired()
> {
> double i=1.0;
> val=ran0(idum);
> tn=p/(1-p*(val/(1/p)));
> if(val<i)
> call Leds.redToggle();
>
> return SUCCESS;
> }
>
> }
>
> Thanks
> Lakshmi
>
> ----- Original Message ----
> From: Michael Schippling <[EMAIL PROTECTED]>
> To: Lakshmi Pradeep <[EMAIL PROTECTED]>
> Cc: tinyos-help@millennium.berkeley.edu
> Sent: Wednesday, May 28, 2008 1:16:39 AM
> Subject: Re: [Tinyos-help] (no subject)
>
> All that should work just like good old C...
> Do you have specific problems that we can argue about?
> MS
>
>
> Lakshmi Pradeep wrote:
> > Hi
> > I have some doubts regarding the use of pointers in
> > nesC.Can we use a simple C function like double rand(long &idum) in
> > nesC? What are bitwise operators used in nesC? Please reply.
> > Thanks
> > Lakshmi
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > Tinyos-help mailing list
> > Tinyos-help@millennium.berkeley.edu
> <mailto:Tinyos-help@millennium.berkeley.edu>
> > https://www.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
>
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