复制代码 信号延迟(Signal Delay):使用延迟关键字(delay)来指定信号的传播延迟。例如: signal out_signal : std_logic; signal in_signal : std_logic := '1'; ... out_signal <= in_signal after 10 ns; 复制代码 总结起来,signal在VHDL中的用法主要是用于定义、赋值、连接、触发和延迟等操作,以实现数...
attribute keep of error_channelb: signal is "true"; 用法就是 keep a signal after mapping; 如果要用chipscope和在ucf文件中直接使用信号名的,可用keep这保持,这样可方便我们添加观察信号和添加约束. Often you want to assign a constraint to a particular signal in your design, or you want be able to...