Method: HDLRuby::High::Std#before

Defined in:
lib/HDLRuby/std/counters.rb

#before(init, rst = $rst, clk = $clk, &code) ⇒ Object

Sets a counter to +init+ when +rst+ is 1 that is decreased according to +clk+. As long as this counter does not reach 0, +code+ is executed. When not within a block, a behavior will be created which is activated on the rising edge of +clk+.



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# File 'lib/HDLRuby/std/counters.rb', line 45

def before(init, rst = $rst, clk = $clk, &code)
    with_counter(init,rst,clk) do |counter|
        seq do
            hif(rst.to_expr == 1) do
                counter.to_ref <= init.to_expr
            end
            helsif(counter.to_expr != 0) do
                counter.to_ref <= counter.to_expr - 1
                # code.call
                instance_eval(&code)
            end
        end
    end
end