aes_fsm.cpp

VHDL to System C translator

#include "aes_fsm.h"


void aes_fsm::clocked_proc() {
  if (resetn.read() == 0) {
  current_state.write((state_type)(s0 ));
 key_addr_cld.write((sc_uint<4>)("0b0000"));
 key_addr_mux_cld.write((bool)(0 ));
 sel_cld.write((sc_uint<4>)("0b0000"));
 sel_ft_fs_cld.write((bool)(0 ));
  } else 
if (clk.posedge()) {
  current_state.write((state_type)(next_state.read() ));
 
switch (current_state.read()) {
case s1 :
 key_addr_mux_cld.write((bool)(1 ));
 break;
  case ldkey :
 key_addr_cld.write((sc_uint<4>)(key_addr_cld.read() + 1 ));
 break;
 case sx :
 sel_cld.write((sc_uint<4>)(sel_cld.read() + 1 ));
 break;
 case s2 :
 sel_cld.write((sc_uint<4>)(sel_cld.read() + 1 ));
 break;
 case xorrk :
 key_addr_cld.write((sc_uint<4>)(key_addr_cld.read() + 1 ));
 break;
 case s4 :
 sel_ft_fs_cld.write((bool)(1 ));
 break;
 case s3 :
 sel_cld.write((sc_uint<4>)(sel_cld.read() + 1 ));
 break;
 case s5 :
 sel_cld.write((sc_uint<4>)(sel_cld.read() + 1 ));
 break;
 case dvalid :
 key_addr_cld.write((sc_uint<4>)("0b0000"));
 key_addr_mux_cld.write((bool)(0 ));
 sel_cld.write((sc_uint<4>)("0b0000"));
 sel_ft_fs_cld.write((bool)(0 ));
 break;
 default :   break;

}   
}
}
void aes_fsm::nextstate_proc() {
  
switch (current_state.read()) {
case s0 :
 if ((key_done.read() == 1 && ld_data.read() == 1)) {
  next_state.write((state_type)(s1 ));
  } else {
 next_state.write((state_type)(s0 ));

 
} break;
  case s1 :
 next_state.write((state_type)(s8 ));
 break;
 case ldkey :
 next_state.write((state_type)(sx ));
 break;
 case sx :
 if (sel_cld.read()(1,0 ) == (sc_uint<2>)"0b10") {
  next_state.write((state_type)(s2 ));
  } else {
 next_state.write((state_type)(sx ));

 
} break;
 case s2 :
 if (sel_cld.read() != (sc_uint<4>)"0b1111") {
  next_state.write((state_type)(sx ));
  } else 
if (sel_cld.read() == (sc_uint<4>)"0b1111") {
  next_state.write((state_type)(xorrk ));
  } else {
 next_state.write((state_type)(s2 ));

 
} break;
 case xorrk :
 if (key_addr_cld.read() == (sc_uint<4>)"0b1001") {
  next_state.write((state_type)(s4 ));
  } else 
if (key_addr_cld.read() != (sc_uint<4>)"0b1001") {
  next_state.write((state_type)(sx ));
  } else {
 next_state.write((state_type)(xorrk ));

 
} break;
 case s4 :
 next_state.write((state_type)(s3 ));
 break;
 case s3 :
 if (sel_cld.read()(1,0 ) == (sc_uint<2>)"0b10") {
  next_state.write((state_type)(s5 ));
  } else {
 next_state.write((state_type)(s3 ));

 
} break;
 case s5 :
 if (sel_cld.read() != (sc_uint<4>)"0b1111") {
  next_state.write((state_type)(s3 ));
  } else 
if (sel_cld.read() == (sc_uint<4>)"0b1111") {
  next_state.write((state_type)(s6 ));
  } else {
 next_state.write((state_type)(s5 ));

 
} break;
 case s6 :
 next_state.write((state_type)(dvalid ));
 break;
 case dvalid :
 if (key_done.read() == 0) {
  next_state.write((state_type)(s0 ));
  } else 
if ((key_done.read() == 1 && ld_data.read() == 1)) {
  next_state.write((state_type)(s1 ));
  } else {
 next_state.write((state_type)(dvalid ));

 
} break;
 case s8 :
 next_state.write((state_type)(ldkey ));
 break;
 default : next_state.write((state_type)(s0 ));
 break;

}
}
void aes_fsm::output_proc() {
  busy.write((bool)(1 ));
 clr_temp.write((bool)(0 ));
 data_valid.write((bool)(0 ));
 ld.write((bool)(0 ));
 ld_din.write((bool)(0 ));
 sel_dmux.write((bool)(0 ));
 sel_imux.write((bool)(0 ));
 
switch (current_state.read()) {
case s0 :
 busy.write((bool)(0 ));
 break;
  case ldkey :
 ld.write((bool)(1 ));
 ld_din.write((bool)(1 ));
 clr_temp.write((bool)(1 ));
 break;
 case s2 :
 ld.write((bool)(1 ));
 break;
 case xorrk :
 sel_dmux.write((bool)(1 ));
 sel_imux.write((bool)(0 ));
 ld_din.write((bool)(1 ));
 break;
 case s5 :
 ld.write((bool)(1 ));
 break;
 case s6 :
 sel_dmux.write((bool)(1 ));
 sel_imux.write((bool)(0 ));
 ld_din.write((bool)(1 ));
 break;
 case dvalid :
 data_valid.write((bool)(1 ));
 busy.write((bool)(0 ));
 break;
 default :   break;

}
}
void aes_fsm::comb_assignments() {

key_addr.write((sc_uint<4>)(key_addr_cld.read() ));
key_addr_mux.write((bool)(key_addr_mux_cld.read() ));
sel.write((sc_uint<4>)(sel_cld.read() ));
sel_ft_fs.write((bool)(sel_ft_fs_cld.read() ));

}