continuous assignment用來描述組合邏輯,有幾個思維和C語言不太一樣。 Introduction 1.當等號右邊的任何輸入發生改變時,continuous assignment敘述會再重新計算過。 2.等號兩邊之位元長度不必相同,不足會補0,過長會忽略。 3.不會合成出latch。 Reference
6.1.2 The continuous assignment statement Frm: IEEE Std 1364™-2001, IEEE Standard Verilog® Hardware Description Language The continuous assignment statement shall place a continuous assignment on a net data type. The net may be explicitly declared, or may inherit an implicit declaration in acco...
编译时出现了以下错误提示:Error (10219): Verilog HDL Continuous Assignment error at dec4_16x.v(13): object "yn" on left-hand side of assignment must have a net type而代码中的第13行为“assign yn = ~y;”这里代码的错误可能是什么? A、变量类型定义错误
wire), while the left-hand-side of a procedural assignment (in an always block) must be avariabletype (e.g., reg). These types (wire vs. reg) have nothing to do with what hardware is synthesized, and is just syntax left over from Verilog's use as ...