Thanks alot Alan Fitch for the response. I tried to clear my fifo with some looping logic as shown below
#ifndef FIFO_H_
#define FIFO_H_
#define SC_INCLUDE_FX
#include "systemc.h"
#include<iostream>
SC_MODULE(FIFO){
sc_in<sc_ufixed<8,8,SC_TRN,SC_SAT> > din;
sc_in<bool> read_en; // Read enable
sc_in<bool> write_en;
sc_in<bool> reset;
sc_out<sc_ufixed<8,8,SC_TRN,SC_SAT> > dout;
sc_out<sc_ufixed<9,9,SC_TRN,SC_SAT> > data_count;
sc_fifo<sc_ufixed<8,8, SC_TRN, SC_SAT> > buffer; // FIFO declaration
sc_ufixed<8,8,SC_TRN,SC_SAT> temp;
void memory_process(){
while(true){
wait(0.2, SC_SEC);
temp=din.read();
if (write_en.read()==1){
buffer.nb_write(temp);
cout<<"@" << sc_time_stamp()<< " :: write enable is on " << buffer << " Delta count "<< sc_delta_count()<<endl;
}
else if (read_en.read()==1)
{
dout = buffer.read();
std::cout<<"@" << sc_time_stamp()<< " :: fifo read occurs" << dout << endl;
}
if(reset.read()==1)
{
while(buffer.num_available()!=0){
buffer.nb_read(temp);
std::cout<<"@" << sc_time_stamp()<< "::fifo reset is working" << buffer.num_available() << endl;
}
}
data_count= buffer.num_available();
cout<<"@" << sc_time_stamp()<< " :: data count = " << data_count.read() << " delta cycle " << sc_delta_count() << endl;
}
}
SC_CTOR(FIFO) :buffer(512)
{
SC_THREAD(memory_process);
dont_initialize();
sensitive<<din<<read_en<<write_en<< reset; //<<read_en<<write_en;
}
};
#endif /* FIFO_H_ */
source module
#ifndef RNG_H_
#define RNG_H_
#define SC_INCLUDE_FX
#include "systemc.h"
#include <stdlib.h> //for srand(uint) and rand()
#include <iostream>
SC_MODULE(rng){
sc_out<sc_ufixed< 8,8,SC_TRN,SC_SAT> > output1;
sc_ufixed<8,8,SC_TRN,SC_SAT> A;
void process(){ //
while(true)
{
wait(0.2, SC_SEC); // sample time
A=rand() % 254 ; // range 0 to 253
output1.write(A);
std::cout<<"@" << sc_time_stamp() << " rng output = " << output1 << " delta cycle " << sc_delta_count() <<endl;
}
}
SC_CTOR(rng)
{
SC_THREAD(process);
}
};
#endif /* RNG_H_ */
test module
#define SC_INCLUDE_FX
#include "systemc.h"
#include "rng.h"
#include "fifo.h"
#include<iostream>
#include<stdlib.h>
int sc_main (int argc, char* argv[]) {
sc_buffer< sc_ufixed<8,8,SC_TRN,SC_SAT> > dinsignal;
sc_buffer<bool> readen_signal;
sc_buffer<bool> writeen_signal;
sc_buffer<bool> resetsignal;
sc_buffer< sc_ufixed<8,8,SC_TRN,SC_SAT> > doutsignal;
sc_buffer< sc_ufixed<9,9,SC_TRN,SC_SAT> > dcountsignal;
srand(37);
rng r1("rng");
r1.output1(dinsignal);
FIFO f1("FIFO");
f1.din(dinsignal);
f1.read_en(readen_signal);
f1.write_en(writeen_signal);
f1.reset(resetsignal);
f1.dout(doutsignal);
f1.data_count(dcountsignal);
readen_signal = 0;
writeen_signal =1;
resetsignal =0;
sc_start(1, SC_SEC);
readen_signal = 1;
writeen_signal =0;
resetsignal =1;
sc_start(1, SC_SEC);
readen_signal = 0;
writeen_signal =1;
resetsignal =0;
sc_start(1, SC_SEC);
return 0;
}
output
@200 ms rng output = 0
@200 ms :: write enable is on 0
@200 ms :: data count = 0
@400 ms rng output = 99
@400 ms :: write enable is on 0
99
@400 ms :: data count = 0
@600 ms rng output = 67
@600 ms :: write enable is on 0
99
67
@600 ms :: data count = 1
@800 ms rng output = 107
@800 ms :: write enable is on 0
99
67
107
@800 ms :: data count = 2
@1 s rng output = 157
@1 s :: write enable is on 0
99
67
107
157
@1 s :: data count = 3
@1200 ms rng output = 212
@1200 ms :: fifo read occurs0
@1200 ms::fifo reset is working3
@1200 ms::fifo reset is working2
@1200 ms::fifo reset is working1
@1200 ms::fifo reset is working0
@1200 ms :: data count = 0
@1400 ms rng output = 167
@1600 ms rng output = 55
@1800 ms rng output = 227
@2 s rng output = 228
@2200 ms rng output = 122
@2400 ms rng output = 82
@2600 ms rng output = 245
@2800 ms rng output = 135
As you can the output @1200ms when fifo reset.read()==1, the fifo clears all the data (reads all the data) at that instant which is working as expected. But after @1200ms no other operations are happening in fifo Even after the resetsignal=0 and writeenable=1 @2000ms, no other operations happening in FIFO. Literally fifo dosent work after reset occurs. can anyone point out what is problem and how to resolve it? thanks in advance
