2.组合逻辑一定要用阻塞赋值=,敏感列表没有posedge就用=,有assign就用= 3.时序逻辑和组合逻辑必须分成不同的模块,即一个always中只能有=和<=中的一种 部分报错信息(参考 https://www.bilibili.com/read/cv12437719) [Synth 8-2576] procedural assignment to a non-register Data is not permitted always 块...
Verilog HDL包含两种类型的过程赋值语句: - 阻塞过程赋值语句(Blocking procedural assignment) - 非阻塞过程赋值语句(Nonblocking procedural assignment) 阻塞和非阻塞过程赋值语句在顺序块中有不同的执行流程,我们接下来详细介绍~ 阻塞过程赋值(Blocking procedural assignment) 在一个顺序块(sequential block)中,阻塞赋值...
代码: reg[data_width-1:0] in31_reg [0:depth-1];//genvar k1; // Error:procedural assignment to a non-register k1 is not permitted, left-hand side should be reg/integer/time/genvarintegerk1;generatealways@(posedgeclkornegedgerst_n)beginif(!rst_n)beginfor(k1=0;k1<depth;k1=k1+1)beg...
procedural assignment to a non-register result_a is not permitted. VERI-1100 Done: error code 2 The line in question is the first assignment to one of these registers, in another always block. Code:[Select] result_a <= 0; I guess it does not like setting the register through the wires...
verilog hdl procedural assignment error 在Verilog HDL中,出现了一种常见的错误,即过程性赋值错误。过程性赋值是指在描述硬件行为时,使用非阻塞赋值(<=)或阻塞赋值(=)进行信号赋值操作。然而,由于Verilog HDL的过程性建模特性,使用过程性赋值时容易出现一些错误,因此需要注意并避免这些错误的发生。 一、什么是过程性...
使用Quartus进行编译的过程中,出现以下报错,Verilog HDL Procedural Assignment error at tb.v(20): object "cap_flow" on left-hand side of assignment must have a variable data type 答:一般都是信号类型定义出错,原来定义为wire改为reg,或者reg的改为wire,请看:http://fpgabbs.com/forum.php?mod ......
Procedural :Blocking and Nonblocking procedural assignment statements. 阻塞赋值:evaluates, schedules同一时刻一步执行。 非阻塞赋值:evaluates, schedules在不同时刻执行,分为两步。 module non_block1; reg a, b, c, d, e, f; //blocking assignments ...
The significant thing to notice in the example is the use of the non-blocking assignment. A basic rule of thumb is to use ⇐ when there is a posedge or negedge statement within the always clause. A variant of the D-flop is one with an asynchronous reset; there is a convention that ...
(5)//non-block-assigment with block-assignmentai = 4'd3 ; //(6)bi = 4'd4 ; //(7)value_blk = ai + bi ; //(8)value_non <= ai + bi ; //(9)//non-block-assigment itselfai2 <= 4'd5 ; //(10)bi2 <= 4'd6 ; //(11)value_non2 <= ai2 + bi2 ; //(12)...
赋值语句 在 Verilog 中,信号的赋值方式有: (1) 连续赋值(Continuous Assignment)语句 使用 assign 语句为 wire 类型的变量赋值,不可以对寄存器类型的变量赋值.例如: assign c=a&b; 或直接用: wire c=a&b; (2) 过程赋值语句(Procedural Assignment) 过程赋值语句又可以分为非阻塞赋值(Non-Blocking Assignment...