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UVM Monitor

Summary

The UVM Monitor is

Coding Guidelines

Coding Guidelines

  • Use conditional compilation guards to avoid compiling the same include file more than once. 
    var_name = transaction_type::type_id::create("var_name");

Code Example

monitor.sv
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`ifndef GPIO_UVC_MONITOR_SV
`define GPIO_UVC_MONITOR_SV

class gpio_uvc_monitor extends uvm_monitor;

  `uvm_component_utils(gpio_uvc_monitor)

  uvm_analysis_port #(gpio_uvc_sequence_item) analysis_port;

  virtual gpio_uvc_if                         vif;
  gpio_uvc_config                             m_config;
  gpio_uvc_sequence_item                      m_trans;

  extern function new(string name, uvm_component parent);

  extern function void build_phase(uvm_phase phase);
  extern task run_phase(uvm_phase phase);
  extern task do_mon();

endclass : gpio_uvc_monitor


function gpio_uvc_monitor::new(string name, uvm_component parent);
  super.new(name, parent);
endfunction : new


function void gpio_uvc_monitor::build_phase(uvm_phase phase);
  if (!uvm_config_db#(virtual gpio_uvc_if)::get(get_parent(), "", "vif", vif)) begin
    `uvm_fatal(get_name(), "Could not retrieve gpio_uvc_if from config db")
  end

  if (!uvm_config_db#(gpio_uvc_config)::get(get_parent(), "", "config", m_config)) begin
    `uvm_fatal(get_name(), "Could not retrieve gpio_uvc_config from config db")
  end

  analysis_port = new("analysis_port", this);
endfunction : build_phase


task gpio_uvc_monitor::run_phase(uvm_phase phase);
  m_trans = gpio_uvc_sequence_item::type_id::create("m_trans");
  do_mon();
endtask : run_phase


task gpio_uvc_monitor::do_mon();
  forever begin
    if (m_config.is_active) begin
      @(vif.gpio_pin);
      m_trans.gpio_pin = vif.gpio_pin & m_config.get_mask();
    end else begin
      @(vif.gpio_pin_passive);
      m_trans.gpio_pin = vif.gpio_pin_passive & m_config.get_mask();
    end
    `uvm_info(get_type_name(), {"Got item: ", m_trans.convert2string()}, UVM_MEDIUM)
    analysis_port.write(m_trans);
  end
endtask : do_mon

`endif // GPIO_UVC_MONITOR_SV

Reference Material

Accellera

Verification Methodology Cookbooks

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Source code