Class: RubyHDL::High::SequencerT

Inherits:
Object
  • Object
show all
Defined in:
lib/HDLRuby/std/sequencer_sw.rb

Overview

Describes a SW implementation of a sequencer.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(clk = nil, start = nil, &ruby_block) ⇒ SequencerT

Create a new sequencer block, with clock counter +clk+ and run control +start+. Note: if +clk+ is not provided no clock counter will be generate.



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 3714

def initialize(clk = nil, start = nil, &ruby_block)
  # Sets the clock counter and start control.
  @clk = clk
  @start = start
  if @start then
    this = self
    # Make @start a controlling signal.
    @start.define_singleton_method(:<=,val) do
      this.resume if val.to_i == 1
    end
  end
  # Create a set of sfunction used in the sequencer.
  @sfunctions = {}
  # Create the main block.
  @blk = RubyHDL::High::Sblock.new(self,&ruby_block)
  # Build the Ruby code.
  @source = ""
  @code = nil
  self.build_ruby
end

Instance Attribute Details

#clk ⇒ Object (readonly)

The clock counter.



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 3709

def clk
  @clk
end

#source ⇒ Object (readonly)

The source code (in ruby).



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 3706

def source
  @source
end

Instance Method Details

#add_sfunction(name, sfunction) ⇒ Object

Add a sfunction.



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 3736

def add_sfunction(name,sfunction)
  @sfunctions[name.to_sym] = sfunction
end

#alive? ⇒ Boolean

Check is the sequencer can still be resumed.

Returns:

  • (Boolean) 


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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 3829

def alive?
  @code.alive?
end

#build_ruby ⇒ Object

Build the ruby code.



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 3751

def build_ruby
  this = self
  @source = <<-BUILD
#{RubyHDL::High.global_sblock.each_signal.map do |signal|
  # puts "for signal=#{signal.name} with type=#{signal.type}"
  case signal.dir
  when :input
    signal.to_ruby + " = RubyHDL.#{signal.name}"
  else
    signal.to_ruby + " ||= " + 
    (signal.array? ? "[]" : signal.value? ? signal.value.inspect : "0")
  end
end.join("\n")}

#{@sfunctions.map {|n,f| f.to_ruby }.join("\n\n")}

Fiber.new do
#{@blk.to_ruby}
end
BUILD
  # puts "building code_txt=" + @source
  self.reset!
end

#clk_up(count = 1) ⇒ Object

Generate a clock up of +count+ cycles if any clock.



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 3796

def clk_up(count = 1)
  if @clk then
    return "#{clk.to_ruby} += #{count.to_i}"
  else
    return ""
  end
end

#clk_up_c(count = 1) ⇒ Object

Generate a clock up of +count+ cycles if any clock for C code.



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 3805

def clk_up_c(count = 1)
  if @clk then
    return "#{clk.to_c} += #{count.to_i};"
  else
    return ""
  end
end

#reset! ⇒ Object

Resets the sequencer.



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 3824

def reset!
  @code = TOPLEVEL_BINDING.eval(@source)
end

#resume ⇒ Object Also known as: call

Executes the sequencer.



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 3817

def resume
  # @code.call
  @code.resume
end

#sfunction(name) ⇒ Object

Get a sfunction by name.



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 3746

def sfunction(name)
  return @sfunctions[name.to_sym]
end

#sfunction?(name) ⇒ Boolean

Check if a sfunction is present.

Returns:

  • (Boolean) 


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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 3741

def sfunction?(name)
  return @sfunctions.key?(name.to_sym)
end

#to_c ⇒ Object

Convert to C code.



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 3781

def to_c
  typ = nil
  res = <<-BUILDC
#{RubyHDL::High.global_sblock.each_signal.map do |signal|
  typ = signal.type
  typ.to_c + " " + signal.to_c + "=" + typ.to_c_init + ";"
end.join("\n")}
#{sblock.to_c}
BUILDC
  return res
end

#to_ruby ⇒ Object

Get the Ruby code.



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# File 'lib/HDLRuby/std/sequencer_sw.rb', line 3776

def to_ruby
  return @code
end