first_nios2_system.v

最简单的nios例程

  //~LED_PIO_s1_write_n assignment, which is an e_mux
  assign LED_PIO_s1_write_n = ~(cpu_0_data_master_granted_LED_PIO_s1 & cpu_0_data_master_write);

  assign shifted_address_to_LED_PIO_s1_from_cpu_0_data_master = cpu_0_data_master_address_to_slave;
  //LED_PIO_s1_address mux, which is an e_mux
  assign LED_PIO_s1_address = shifted_address_to_LED_PIO_s1_from_cpu_0_data_master >> 2;

  //d1_LED_PIO_s1_end_xfer register, which is an e_register
  always @(posedge clk or negedge reset_n)
    begin
      if (reset_n == 0)
          d1_LED_PIO_s1_end_xfer <= 1;
      else if (1)
          d1_LED_PIO_s1_end_xfer <= LED_PIO_s1_end_xfer;
    end


  //LED_PIO_s1_waits_for_read in a cycle, which is an e_mux
  assign LED_PIO_s1_waits_for_read = LED_PIO_s1_in_a_read_cycle & LED_PIO_s1_begins_xfer;

  //LED_PIO_s1_in_a_read_cycle assignment, which is an e_assign
  assign LED_PIO_s1_in_a_read_cycle = cpu_0_data_master_granted_LED_PIO_s1 & cpu_0_data_master_read;

  //in_a_read_cycle assignment, which is an e_mux
  assign in_a_read_cycle = LED_PIO_s1_in_a_read_cycle;

  //LED_PIO_s1_waits_for_write in a cycle, which is an e_mux
  assign LED_PIO_s1_waits_for_write = LED_PIO_s1_in_a_write_cycle & 0;

  //LED_PIO_s1_in_a_write_cycle assignment, which is an e_assign
  assign LED_PIO_s1_in_a_write_cycle = cpu_0_data_master_granted_LED_PIO_s1 & cpu_0_data_master_write;

  //in_a_write_cycle assignment, which is an e_mux
  assign in_a_write_cycle = LED_PIO_s1_in_a_write_cycle;

  assign wait_for_LED_PIO_s1_counter = 0;

//synthesis translate_off
//////////////// SIMULATION-ONLY CONTENTS
  //LED_PIO/s1 enable non-zero assertions, which is an e_register
  always @(posedge clk or negedge reset_n)
    begin
      if (reset_n == 0)
          enable_nonzero_assertions <= 0;
      else if (1)
          enable_nonzero_assertions <= 1'b1;
    end



//////////////// END SIMULATION-ONLY CONTENTS

//synthesis translate_on

endmodule



// turn off superfluous verilog processor warnings 
// altera message_level Level1 
// altera message_off 10034 10035 10036 10037 10230 10240 10030 

module cpu_0_jtag_debug_module_arbitrator (
                                            // inputs:
                                             clk,
                                             cpu_0_data_master_address_to_slave,
                                             cpu_0_data_master_byteenable,
                                             cpu_0_data_master_debugaccess,
                                             cpu_0_data_master_read,
                                             cpu_0_data_master_waitrequest,
                                             cpu_0_data_master_write,
                                             cpu_0_data_master_writedata,
                                             cpu_0_instruction_master_address_to_slave,
                                             cpu_0_instruction_master_latency_counter,
                                             cpu_0_instruction_master_read,
                                             cpu_0_jtag_debug_module_readdata,
                                             cpu_0_jtag_debug_module_resetrequest,
                                             reset_n,

                                            // outputs:
                                             cpu_0_data_master_granted_cpu_0_jtag_debug_module,
                                             cpu_0_data_master_qualified_request_cpu_0_jtag_debug_module,
                                             cpu_0_data_master_read_data_valid_cpu_0_jtag_debug_module,
                                             cpu_0_data_master_requests_cpu_0_jtag_debug_module,
                                             cpu_0_instruction_master_granted_cpu_0_jtag_debug_module,
                                             cpu_0_instruction_master_qualified_request_cpu_0_jtag_debug_module,
                                             cpu_0_instruction_master_read_data_valid_cpu_0_jtag_debug_module,
                                             cpu_0_instruction_master_requests_cpu_0_jtag_debug_module,
                                             cpu_0_jtag_debug_module_address,
                                             cpu_0_jtag_debug_module_begintransfer,
                                             cpu_0_jtag_debug_module_byteenable,
                                             cpu_0_jtag_debug_module_chipselect,
                                             cpu_0_jtag_debug_module_debugaccess,
                                             cpu_0_jtag_debug_module_readdata_from_sa,
                                             cpu_0_jtag_debug_module_reset,
                                             cpu_0_jtag_debug_module_reset_n,
                                             cpu_0_jtag_debug_module_resetrequest_from_sa,
                                             cpu_0_jtag_debug_module_write,
                                             cpu_0_jtag_debug_module_writedata,
                                             d1_cpu_0_jtag_debug_module_end_xfer
                                          )
  /* synthesis auto_dissolve = "FALSE" */ ;

  output           cpu_0_data_master_granted_cpu_0_jtag_debug_module;
  output           cpu_0_data_master_qualified_request_cpu_0_jtag_debug_module;
  output           cpu_0_data_master_read_data_valid_cpu_0_jtag_debug_module;
  output           cpu_0_data_master_requests_cpu_0_jtag_debug_module;
  output           cpu_0_instruction_master_granted_cpu_0_jtag_debug_module;
  output           cpu_0_instruction_master_qualified_request_cpu_0_jtag_debug_module;
  output           cpu_0_instruction_master_read_data_valid_cpu_0_jtag_debug_module;
  output           cpu_0_instruction_master_requests_cpu_0_jtag_debug_module;
  output  [  8: 0] cpu_0_jtag_debug_module_address;
  output           cpu_0_jtag_debug_module_begintransfer;
  output  [  3: 0] cpu_0_jtag_debug_module_byteenable;
  output           cpu_0_jtag_debug_module_chipselect;
  output           cpu_0_jtag_debug_module_debugaccess;
  output  [ 31: 0] cpu_0_jtag_debug_module_readdata_from_sa;
  output           cpu_0_jtag_debug_module_reset;
  output           cpu_0_jtag_debug_module_reset_n;
  output           cpu_0_jtag_debug_module_resetrequest_from_sa;
  output           cpu_0_jtag_debug_module_write;
  output  [ 31: 0] cpu_0_jtag_debug_module_writedata;
  output           d1_cpu_0_jtag_debug_module_end_xfer;
  input            clk;
  input   [ 13: 0] cpu_0_data_master_address_to_slave;
  input   [  3: 0] cpu_0_data_master_byteenable;
  input            cpu_0_data_master_debugaccess;
  input            cpu_0_data_master_read;
  input            cpu_0_data_master_waitrequest;
  input            cpu_0_data_master_write;
  input   [ 31: 0] cpu_0_data_master_writedata;
  input   [ 13: 0] cpu_0_instruction_master_address_to_slave;
  input            cpu_0_instruction_master_latency_counter;
  input            cpu_0_instruction_master_read;
  input   [ 31: 0] cpu_0_jtag_debug_module_readdata;
  input            cpu_0_jtag_debug_module_resetrequest;
  input            reset_n;

  wire             cpu_0_data_master_arbiterlock;
  wire             cpu_0_data_master_arbiterlock2;
  wire             cpu_0_data_master_continuerequest;
  wire             cpu_0_data_master_granted_cpu_0_jtag_debug_module;
  wire             cpu_0_data_master_qualified_request_cpu_0_jtag_debug_module;
  wire             cpu_0_data_master_read_data_valid_cpu_0_jtag_debug_module;
  wire             cpu_0_data_master_requests_cpu_0_jtag_debug_module;
  wire             cpu_0_data_master_saved_grant_cpu_0_jtag_debug_module;
  wire             cpu_0_instruction_master_arbiterlock;
  wire             cpu_0_instruction_master_arbiterlock2;
  wire             cpu_0_instruction_master_continuerequest;
  wire             cpu_0_instruction_master_granted_cpu_0_jtag_debug_module;
  wire             cpu_0_instruction_master_qualified_request_cpu_0_jtag_debug_module;
  wire             cpu_0_instruction_master_read_data_valid_cpu_0_jtag_debug_module;
  wire             cpu_0_instruction_master_requests_cpu_0_jtag_debug_module;
  wire             cpu_0_instruction_master_saved_grant_cpu_0_jtag_debug_module;
  wire    [  8: 0] cpu_0_jtag_debug_module_address;
  wire             cpu_0_jtag_debug_module_allgrants;
  wire             cpu_0_jtag_debug_module_allow_new_arb_cycle;
  wire             cpu_0_jtag_debug_module_any_bursting_master_saved_grant;
  wire             cpu_0_jtag_debug_module_any_continuerequest;
  reg     [  1: 0] cpu_0_jtag_debug_module_arb_addend;
  wire             cpu_0_jtag_debug_module_arb_counter_enable;
  reg              cpu_0_jtag_debug_module_arb_share_counter;
  wire             cpu_0_jtag_debug_module_arb_share_counter_next_value;
  wire             cpu_0_jtag_debug_module_arb_share_set_values;
  wire    [  1: 0] cpu_0_jtag_debug_module_arb_winner;
  wire             cpu_0_jtag_debug_module_arbitration_holdoff_internal;
  wire             cpu_0_jtag_debug_module_beginbursttransfer_internal;
  wire             cpu_0_jtag_debug_module_begins_xfer;
  wire             cpu_0_jtag_debug_module_begintransfer;
  wire    [  3: 0] cpu_0_jtag_debug_module_byteenable;
  wire             cpu_0_jtag_debug_module_chipselect;
  wire    [  3: 0] cpu_0_jtag_debug_module_chosen_master_double_vector;
  wire    [  1: 0] cpu_0_jtag_debug_module_chosen_master_rot_left;
  wire             cpu_0_jtag_debug_module_debugaccess;
  wire             cpu_0_jtag_debug_module_end_xfer;
  wire             cpu_0_jtag_debug_module_firsttransfer;
  wire    [  1: 0] cpu_0_jtag_debug_module_grant_vector;
  wire             cpu_0_jtag_debug_module_in_a_read_cycle;
  wire             cpu_0_jtag_debug_module_in_a_write_cycle;
  wire    [  1: 0] cpu_0_jtag_debug_module_master_qreq_vector;
  wire             cpu_0_jtag_debug_module_non_bursting_master_requests;
  wire    [ 31: 0] cpu_0_jtag_debug_module_readdata_from_sa;
  reg              cpu_0_jtag_debug_module_reg_firsttransfer;
  wire             cpu_0_jtag_debug_module_reset;
  wire             cpu_0_jtag_debug_module_reset_n;
  wire             cpu_0_jtag_debug_module_resetrequest_from_sa;
  reg     [  1: 0] cpu_0_jtag_debug_module_saved_chosen_master_vector;
  reg              cpu_0_jtag_debug_module_slavearbiterlockenable;
  wire             cpu_0_jtag_debug_module_slavearbiterlockenable2;
  wire             cpu_0_jtag_debug_module_unreg_firsttransfer;
  wire             cpu_0_jtag_debug_module_waits_for_read;
  wire             cpu_0_jtag_debug_module_waits_for_write;
  wire             cpu_0_jtag_debug_module_write;
  wire    [ 31: 0] cpu_0_jtag_debug_module_writedata;
  reg              d1_cpu_0_jtag_debug_module_end_xfer;
  reg              d1_reasons_to_wait;
  reg              enable_nonzero_assertions;
  wire             end_xfer_arb_share_counter_term_cpu_0_jtag_debug_module;
  wire             in_a_read_cycle;
  wire             in_a_write_cycle;
  reg              last_cycle_cpu_0_data_master_granted_slave_cpu_0_jtag_debug_module;
  reg              last_cycle_cpu_0_instruction_master_granted_slave_cpu_0_jtag_debug_module;
  wire    [ 13: 0] shifted_address_to_cpu_0_jtag_debug_module_from_cpu_0_data_master;
  wire    [ 13: 0] shifted_address_to_cpu_0_jtag_debug_module_from_cpu_0_instruction_master;
  wire             wait_for_cpu_0_jtag_debug_module_counter;
  always @(posedge clk or negedge reset_n)
    begin
      if (reset_n == 0)
          d1_reasons_to_wait <= 0;
      else if (1)
          d1_reasons_to_wait <= ~cpu_0_jtag_debug_module_end_xfer;
    end


  assign cpu_0_jtag_debug_module_begins_xfer = ~d1_reasons_to_wait & ((cpu_0_data_master_qualified_request_cpu_0_jtag_debug_module | cpu_0_instruction_master_qualified_request_cpu_0_jtag_debug_module));
  //assign cpu_0_jtag_debug_module_readdata_from_sa = cpu_0_jtag_debug_module_readdata so that symbol knows where to group signals which may go to master only, which is an e_assign
  assign cpu_0_jtag_debug_module_readdata_from_sa = cpu_0_jtag_debug_module_readdata;

  assign cpu_0_data_master_requests_cpu_0_jtag_debug_module = ({cpu_0_data_master_address_to_slave[13 : 11] , 11'b0} == 14'h1000) & (cpu_0_data_master_read | cpu_0_data_master_write);
  //cpu_0_jtag_debug_module_arb_share_counter set values, which is an e_mux
  assign cpu_0_jtag_debug_module_arb_share_set_values = 1;

  //cpu_0_jtag_debug_module_non_bursting_master_requests mux, which is an e_mux