Adding ADC model and its testbench

Author: ErickOF

modules/adc/Makefile

@@ -0,0 +1,27 @@
+# Include common Makefile
+include ../Makefile
+
+SRCDIR+=../../utils/src
+INCDIR+=-I$(SYSTEMC_AMS_HOME)/include -I../utils/include
+LIBDIR+=-L$(SYSTEMC_AMS_HOME)/lib-linux64
+LIBS+=-lsystemc-ams
+
+# Defining preprocessor directive for debug
+ifdef IPS_DEBUG_EN
+		CFLAGS += -DIPS_DEBUG_EN
+		LFLAGS += -DIPS_DEBUG_EN
+endif # IPS_DEBUG_EN
+
+# Defining preprocessor directive for dumping enable
+ifdef IPS_DUMP_EN
+		CFLAGS += -DIPS_DUMP_EN
+		LFLAGS += -DIPS_DUMP_EN
+endif # IPS_DUMP_EN
+
+# Run the compiled file
+run:
+		@./$(TARGET)
+
+# Show waveform
+waveform:
+		@gtkwave ips_adc.vcd

modules/adc/include/adc.hpp

@@ -0,0 +1,32 @@
+#ifndef IPS_ADC_MODEL_HPP
+#define IPS_ADC_MODEL_HPP
+
+#include <systemc-ams.h>
+#include "vunit.hpp"
+
+
+template <unsigned int BITS = 8, int VMIN = 0, int VMAX = 5, VUnit VU = VUnit::v>
+SCA_TDF_MODULE(dac)
+{
+protected:
+  const double V_MAX = static_cast<double>(VMAX) / static_cast<double>(VU);
+  const double V_MIN = static_cast<double>(VMIN) / static_cast<double>(VU);
+  const double MAX_DIG = static_cast<double>((1 << BITS) - 1);
+public:
+  sca_tdf::sca_in<double> in;
+  sca_tdf::sca_out<sc_dt::sc_uint<BITS> > out;
+
+  SCA_CTOR(dac) : in("in"), out("out") {
+    set_timestep(sca_core::sca_time(0.1, sc_core::SC_US));
+  }
+
+  void processing()
+  {
+    double normalized_ana_in = (in.read() - V_MIN) / (V_MAX - V_MIN);
+    unsigned int dig_code = static_cast<unsigned int>(normalized_ana_in * MAX_DIG);
+
+    this->out.write(static_cast<sc_dt::sc_uint<BITS> >(dig_code));
+  }
+};
+
+#endif // IPS_ADC_MODEL_HPP

modules/adc/include/test_adc.hpp

@@ -0,0 +1,23 @@
+#ifndef IPS_TEST_ADC_HPP
+#define IPS_TEST_ADC_HPP
+
+#include <cstdlib>
+
+
+template <unsigned int N>
+SCA_TDF_MODULE(test_adc) {
+public:
+  sca_tdf::sca_out<double> o_ana;
+  const int MAX_CODE = (1 << N);
+
+  SCA_CTOR(test_adc) {
+    set_timestep(sca_core::sca_time(0.1, sc_core::SC_US));
+  }
+
+  void processing()
+  {
+    this->o_ana.write(static_cast<double>(rand() % MAX_CODE) / MAX_CODE);
+  }
+};
+
+#endif // IPS_TEST_ADC_HPP

modules/adc/src/tb_adc.cpp

@@ -0,0 +1,31 @@
+#include <systemc-ams.h>
+#include "adc.hpp"
+#include "test_adc.hpp"
+
+#define N 8
+
+
+int sc_main(int, char*[])
+{
+  sca_tdf::sca_signal<double> s_ana;
+  sca_tdf::sca_signal<sc_dt::sc_uint<N> > s_dig_out;
+
+  const int MAX_ITER = (1 << N) - 1;
+
+  dac<N> ips_adc("ips_adc");
+  ips_adc.in(s_ana);
+  ips_adc.out(s_dig_out);
+
+  test_adc<N> ips_test_adc("ips_test_adc");
+  ips_test_adc.o_ana(s_ana);
+
+  sca_util::sca_trace_file* tf = sca_util::sca_create_vcd_trace_file("ips_adc");
+  sca_util::sca_trace(tf, s_ana, "in");
+  sca_util::sca_trace(tf, s_dig_out, "out");
+
+  sc_start(MAX_ITER * 0.1, SC_US);
+
+  sca_util::sca_close_vcd_trace_file(tf);
+
+  return 0;
+};