standard_1c6.v

郑亚民版的可编程逻辑器件开发软件quatus ii里的一些例程

  //in_a_write_cycle assignment, which is an e_mux
  assign in_a_write_cycle = DM9000_RST_s1_in_a_write_cycle;

  assign wait_for_DM9000_RST_s1_counter = 0;

  // synthesis attribute DM9000_RST_s1_arbitrator auto_dissolve FALSE

endmodule


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_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_instruction_master_read_data_valid_sdram_s1_shift_register,
                                             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
                                          );

  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   [ 26: 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_write;
  input   [ 31: 0] cpu_0_data_master_writedata;
  input   [ 26: 0] cpu_0_instruction_master_address_to_slave;
  input   [  1: 0] cpu_0_instruction_master_latency_counter;
  input            cpu_0_instruction_master_read;
  input   [  6: 0] cpu_0_instruction_master_read_data_valid_sdram_s1_shift_register;
  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_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_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_continuerequest;
  reg     [  1: 0] cpu_0_jtag_debug_module_arb_addend;
  wire             cpu_0_jtag_debug_module_arb_counter_enable;
  reg     [  1: 0] cpu_0_jtag_debug_module_arb_share_counter;
  wire    [  1: 0] cpu_0_jtag_debug_module_arb_share_counter_next_value;
  wire    [  1: 0] 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    [ 31: 0] cpu_0_jtag_debug_module_readdata_from_sa;
  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_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;
  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             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[26 : 11] , 11'b0} == 27'h280800) & (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_arb_share_counter_next_value assignment, which is an e_assign
  assign cpu_0_jtag_debug_module_arb_share_counter_next_value = cpu_0_jtag_debug_module_firsttransfer ? (cpu_0_jtag_debug_module_arb_share_set_values - 1) : |cpu_0_jtag_debug_module_arb_share_counter ? (cpu_0_jtag_debug_module_arb_share_counter - 1) : 0;

  //cpu_0_jtag_debug_module_allgrants all slave grants, which is an e_mux
  assign cpu_0_jtag_debug_module_allgrants = |cpu_0_jtag_debug_module_grant_vector |
    |cpu_0_jtag_debug_module_grant_vector |
    |cpu_0_jtag_debug_module_grant_vector |
    |cpu_0_jtag_debug_module_grant_vector;

  //cpu_0_jtag_debug_module_end_xfer assignment, which is an e_assign
  assign cpu_0_jtag_debug_module_end_xfer = ~(cpu_0_jtag_debug_module_waits_for_read | cpu_0_jtag_debug_module_waits_for_write);

  //cpu_0_jtag_debug_module_arb_share_counter arbitration counter enable, which is an e_assign
  assign cpu_0_jtag_debug_module_arb_counter_enable = cpu_0_jtag_debug_module_end_xfer & cpu_0_jtag_debug_module_allgrants;

  //cpu_0_jtag_debug_module_arb_share_counter counter, which is an e_register
  always @(posedge clk or negedge reset_n)
    begin
      if (reset_n == 0)
          cpu_0_jtag_debug_module_arb_share_counter <= 0;
      else if (cpu_0_jtag_debug_module_arb_counter_enable)
          cpu_0_jtag_debug_module_arb_share_counter <= cpu_0_jtag_debug_module_arb_share_counter_next_value;
    end


  //cpu_0_jtag_debug_module_slavearbiterlockenable slave enables arbiterlock, which is an e_register
  always @(posedge clk or negedge reset_n)
    begin
      if (reset_n == 0)
          cpu_0_jtag_debug_module_slavearbiterlockenable <= 0;
      else if (|cpu_0_jtag_debug_module_master_qreq_vector & cpu_0_jtag_debug_module_end_xfer)
          cpu_0_jtag_debug_module_slavearbiterlockenable <= |cpu_0_jtag_debug_module_arb_share_counter_next_value;
    end


  //cpu_0/data_master cpu_0/jtag_debug_module arbiterlock, which is an e_assign
  assign cpu_0_data_master_arbiterlock = cpu_0_jtag_debug_module_slavearbiterlockenable & cpu_0_data_master_continuerequest;

  //cpu_0/instruction_master cpu_0/jtag_debug_module arbiterlock, which is an e_assign
  assign cpu_0_instruction_master_arbiterlock = cpu_0_jtag_debug_module_slavearbiterlockenable & cpu_0_instruction_master_continuerequest;

  //cpu_0/instruction_master granted cpu_0/jtag_debug_module last time, which is an e_register
  always @(posedge clk or negedge reset_n)
    begin
      if (reset_n == 0)
          last_cycle_cpu_0_instruction_master_granted_slave_cpu_0_jtag_debug_module <= 0;
      else if (1)
          last_cycle_cpu_0_instruction_master_granted_slave_cpu_0_jtag_debug_module <= cpu_0_instruction_master_saved_grant_cpu_0_jtag_debug_module ? 1 : (cpu_0_jtag_debug_module_arbitration_holdoff_internal | ~cpu_0_instruction_master_requests_cpu_0_jtag_debug_module) ? 0 : last_cycle_cpu_0_instruction_master_granted_slave_cpu_0_jtag_debug_module;
    end


  //cpu_0_instruction_master_continuerequest continued request, which is an e_mux
  assign cpu_0_instruction_master_continuerequest = last_cycle_cpu_0_instruction_master_granted_slave_cpu_0_jtag_debug_module & cpu_0_instruction_master_requests_cpu_0_jtag_debug_module;

  //cpu_0_jtag_debug_module_any_continuerequest at least one master continues requesting, which is an e_mux
  assign cpu_0_jtag_debug_module_any_continuerequest = cpu_0_instruction_master_continuerequest |
    cpu_0_data_master_continuerequest;

  assign cpu_0_data_master_qualified_request_cpu_0_jtag_debug_module = cpu_0_data_master_requests_cpu_0_jtag_debug_module & ~(cpu_0_instruction_master_arbiterlock);
  //cpu_0_jtag_debug_module_writedata mux, which is an e_mux