lp1.h.bak

新型的SystemC-AMS语言

#include "systemc-ams.h"
//#include "math.h"

SCA_SDF_MODULE(lp1) {

   sca_sdf_in<double>   in;
   sca_sdf_out<double>  out;

   double   fp;      // pole frequency
   double   h0;      // DC gain

   double   tau;     // time constant
   double   outn1;   // internal state
   double   tn1;     // t(n-1)

   bool debug_init;
   
   void init() {
      tau = 1.0/(2.0*M_PI*fp);
   }

   void sig_proc() {

      if (debug_init) {
         cout << name() << ": "
              << " FP = " << fp
              << " H0 = " << h0
              << " TAU = " << tau
              << endl;
         debug_init = 0;
      }

      double tn = sc_time_stamp().to_seconds();
      double dt = tn - tn1;

//      cout << name() << ": t = " << tn << " dt = " << dt << endl;

      outn1 = (outn1*tau + h0*in.read()*dt)/(tau + dt);
      tn1 = tn;

 //     cout << "     in = " << in.read() << " outn1 = " << outn1 << endl;

      out.write(outn1);
   }

   SCA_CTOR(lp1) {
      // initializations (init() function?)
//      tau = 1.0/(2.0*M_PI*fp);
      outn1 = 0.0; tn1 = 0.0;
      debug_init = 1;
   }
}; // lp1