Akash901 Posted February 3, 2023 Report Share Posted February 3, 2023 time() process is a SC_METHOD, How to implement it by time() as SC_THREAD ? #include <systemc.h> SC_MODULE(timer) { sc_out<bool> intr0, intr1; sc_out<sc_uint<8>> Data_out; sc_in<sc_uint<8>> Addr, Data_in; sc_in<bool> read_en, write_en, Reset; sc_uint<8> timer_cntrl, timer_val, timer_cmp, timer_intr_status; sc_event e1, e2, e3; int NowTime = 0; int mLastUpdate = 0; void write() { if (write_en.read() == true) { Timer_update(); switch (Addr.read()) { case 0x0: timer_cntrl = Data_in.read(); e1.notify(); Disable_Timer(); break; case 0x4: break; case 0x8: timer_cmp = Data_in.read(); break; case 0xC: timer_intr_status = Data_in.read(); break; } } } void read() { if (read_en.read() == true) { switch (Addr.read()) { case 0x0: Data_out.write(timer_cntrl); break; case 0x4: Timer_update(); Data_out.write(timer_val); break; case 0x8: Data_out.write(timer_cmp); break; case 0xC: Data_out.write(timer_intr_status); break; } } } void Timer_update() { NowTime = sc_time_stamp().to_default_time_units(); //current time if (Reset.read() == 1) { timer_val = 0; timer_cmp = 0; timer_intr_status = 0; timer_val = 0; intr0 = 0; intr1 = 0; } else if (timer_cntrl & 1 << 0) { timer_val = ((NowTime) - mLastUpdate) / (20) % (256); } } void time() { static sc_time time; static int temp = 0; static int flag = 0; if ((time != SC_ZERO_TIME) && (timer_cntrl & 1 << 0)) { int temp = time.to_default_time_units() + mLastUpdate; int time_delay = temp - NowTime; e1.notify(time_delay, SC_NS); time = SC_ZERO_TIME; } else if (timer_cntrl & 1 << 0) { switch (temp) { case 0: next_trigger(20 * (timer_cmp + flag), SC_NS); temp = 1; break; case 1: if (timer_cntrl & 1 << 1) { intr0 = 1; timer_intr_status |= 1 << 0; e2.notify(20, SC_NS); } next_trigger(20 * (255 - timer_cmp), SC_NS); temp = 2; break; case 2: if (timer_cntrl & 1 << 2) { intr1 = 1; timer_intr_status |= 1 << 1; e3.notify(20, SC_NS); } next_trigger(0, SC_NS); temp = 0; flag = 1; break; } } else { time = sc_time_stamp(); } } void Disable_Timer() { static int temp1 = 0; static int temp2 = 0; static bool flag = 0; if (!(timer_cntrl & 1 << 0) && !flag && NowTime) { temp1 = NowTime; flag = 1; } if ((timer_cntrl & 1 << 0) && flag) { temp2 = NowTime; flag = 0; mLastUpdate = temp2 - temp1; } } void interrupt_disable() { while (true) { wait(); if (intr0.read() == 1 || intr1.read() == 1) { intr0 = 0; intr1 = 0; } } } SC_CTOR(timer) { SC_METHOD(write); sensitive << write_en; SC_METHOD(read); sensitive << read_en; SC_THREAD(time); sensitive << e1; SC_THREAD(interrupt_disable); sensitive << e2 << e3; } }; Quote Link to comment Share on other sites More sharing options...
Eyck Posted February 3, 2023 Report Share Posted February 3, 2023 First: using the code feature of the forum makes things more readable. In your constructor you declared time() already as SC_THREAD now you need to surround your code with an endless loop: void time() { static sc_time time; static int temp = 0; static int flag = 0; while(true) { //<=== the endless loop to not leave the thread wait(e1); //<=== waiting for the even to trigger behavior if ((time != SC_ZERO_TIME) && (timer_cntrl & 1 << 0)) { int temp = time.to_default_time_units() + mLastUpdate; int time_delay = temp - NowTime; e1.notify(time_delay, SC_NS); time = SC_ZERO_TIME; } else if (timer_cntrl & 1 << 0) { switch (temp) { case 0: next_trigger(20 * (timer_cmp + flag), SC_NS); temp = 1; break; case 1: if (timer_cntrl & 1 << 1) { intr0 = 1; timer_intr_status |= 1 << 0; e2.notify(20, SC_NS); } next_trigger(20 * (255 - timer_cmp), SC_NS); temp = 2; break; case 2: if (timer_cntrl & 1 << 2) { intr1 = 1; timer_intr_status |= 1 << 1; e3.notify(20, SC_NS); } next_trigger(0, SC_NS); temp = 0; flag = 1; break; } } else { time = sc_time_stamp(); } } } This can be found in any SystemC book or lecture material. Quote Link to comment Share on other sites More sharing options...
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