module DisplayHelpers - verilog_gen-0.0.2 Documentation

v2k_child_instances(klass) click to toggle source

Render child instances.

@return [String] verilog decl @example

cntlr cntlr_inst (
  .clk_port(clk_pin),
  .rst_port(rst_pint)
  );
  // if parameters.
cntlr #(DEPTH=4) cntlr_inst (

# File lib/templates/helpers.rb, line 65
def v2k_child_instances(klass)
  output = ""
  klass.child_instances.each do |instance_name, hdl_instance| 
    output += "  #{hdl_instance.class.module_name}"
    p =  v2k_parameters(hdl_instance.class)
    output += " #{p}" unless p == ""
    output += " #{instance_name}(\n"
    hdl_instance.class.ports.keys[0..-2].each do |port_name|
      output += "    #{v2k_port_instance(port_name, hdl_instance)},\n"
    end
    port_name = hdl_instance.class.ports.keys.last
    if port_name
      output   += "    #{v2k_port_instance(port_name, hdl_instance)}\n"
    end
    output += "  );\n"
  end
  output
end

v2k_parameters(hdl_class) click to toggle source

Create verilog parameter string. @example ram #(.DATA_WIDTH(16), .ADDR_WIDTH(8)) ram(clk, …);

# File lib/templates/helpers.rb, line 29
def v2k_parameters(hdl_class)
  output = ""
  unless hdl_class.parameters.empty?
    output = "#("
    hdl_class.parameters.keys[0..-2].each do |k|
      output += ".#{k}(#{hdl_class.parameters[k]}), "
    end
    k = hdl_class.parameters.keys[-1]
    output += ".#{k}(#{hdl_class.parameters[k]}))"
  end
  return output
end

v2k_port_decl(port) click to toggle source

Render verilog port declaration. @return [String] verilog decl @example

input reg clk,
output wire [1:0] vld

# File lib/templates/helpers.rb, line 9
def v2k_port_decl(port)
  output = "#{port.direction} #{port.type}"
  output += " [#{port.lhs}:#{port.rhs}]" unless port.scalar?
  output += " #{port.name}"
end

v2k_port_instance(port_name, hdl_instance) click to toggle source

# File lib/templates/helpers.rb, line 42
def v2k_port_instance(port_name, hdl_instance)
  output = ""
  if hdl_instance.pins.key? port_name
    pin = hdl_instance.pins[port_name]
    if not pin.port.scalar?
      output = ".#{port_name}(#{pin.name}"
      output += "[#{pin.lhs}:#{pin.rhs}])"
    else
      output = ".#{port_name}(#{pin.name})"
    end
  else
    output = ".#{port_name}()"
  end
end

v2k_port_list_decl(klass) click to toggle source

# File lib/templates/helpers.rb, line 15
def v2k_port_list_decl(klass)
  output = ""
  klass.ports.values[0..-2].each do |port|
    output += "  #{v2k_port_decl(port)},\n"
  end
  last_port = klass.ports.values.last
  if last_port
    output += "  #{v2k_port_decl(last_port)}\n"
  end
end