要理解“阻塞”,还得从The Verilog "stratified event queue"说起,上述paper中对于"stratified event queue"的解释如下: An examination of the Verilog "stratified event queue" (see Figure 1) helps to explain how Verilog blocking and nonblocking assignments function. The "stratified event queue" is a fa...
# ** Note: $stop : D:/FPGA/Verilog/Introduction/sample1.sv(84) # Time: 60 ps Iteration: 0 Instance: /comb_logic_assign16 说明,o1, o2比较好理解。阻塞赋值和非阻塞赋值的过程也如前文所述,记住$display和各种赋值在同一个时间步的执行过程。 关注的问题是,延时在各种情况下对事件触发(例子中是I...
写的很清楚，是你在设计电路的时候将阻塞赋值与非阻塞赋值放在一起使用了，这种情况经常出现在always 块中。这说明你是一个初学verilog的beginner。解决办法，仔细看书，搞明白 = 和 <= 号的作用、区别和使用环境。
blocking=%0d, non_blocking=%0d",$time,a,blocking,non_blocking);always@(posedgeclk)blocking=a+1;always@(posedgeclk)non_blocking<=a+1;always@(posedgeclk)$display("display@%0t
If there are multiple assignment statements in the always block in verilog then they can be done in two different ways 1. Blocking using = 2. Non Blocking using <= We will first consider an example usage of Blocking and non blocking assignments in initial statements. The initial statements ...
Also see Verilog Tutorial Blocking Vs Non Blocking We had presented some introductory tutorial on blocking and non blocking assignment. We will now present some real life issues, solution and best practices for blocking and non blocking assignment statements ...
Always use non-blocking assignments in always_ff blocks. Always use blocking assignments in always_comb blocks. It is possible to do otherwise, but it is bad practice and not recommended. The described way is the only one that makes sense, well for me anyway. Also, all flip-flops will ha...
This page contains tidbits on writing FSM in verilog, difference between blocking and non blocking assignments in verilog, difference between wire and reg, metastability, cross frequency domain interfacing, all about resets, FIFO depth calculation,Typica