$finishis a Verilog system task that tells the simulator to terminate the current simulation. If the last block had a delay of 30 time units like shown below, the simulation would have ended at 30 time units thereby killing all the otherinitialblocks that are active at that time. ...
Verilog中的过程性语句结构主要有以下两种: intial语句; always语句; 在数字设计或者验证平台的搭建过程中,一个模块可以包含任意多个initial语句和always语句,并且这些语句在同一个模块中是并行执行的(需要注意避免竞争情况出现,特别是多个进程对同一个信号的控制)。 两者的主要区别如下表所示: 注意:经常在使用initial时...
SystemVerilog中,initial begin-end是仿真开始就会执行的代码块。比如UVM的test入口函数run_test,一般就是在initial begin-end中调用。还有一些tb会在initial begin-end中使用fork join_none,用于创建一些仿真中的后台进程,如时钟产生,后门驱动等。 那么initial begin-end真的是仿真最早执行的吗? 如果是消耗仿真时间的...
The SystemVerilog standard specifies that variables are to be zero initialized before simulation begins. Some synthesis tools generate logic to achieve this, whereas others do not. This adds the o...
In Verilog HDL, you can use an initial block to initialize the contents of an inferred memory. Quartus II integrated synthesis automatically converts the initial block into a .mif for the inferred RAM. Example 6–19 shows Verilog HDL code that infers a simple dual-port RAM block and co...
verilog中initial和always的区别Verilog是一种硬件描述语言(HDL),用于设计和模拟数字电路。在Verilog中,关键字initial和always都是用于描述电路行为的特殊语句。它们被用来生成仿真模型,并控制模拟器的启动 2024-02-22 16:09:27 initial begin-end真的是仿真最早执行的吗? SystemVerilog中,initial begin-end是仿真开始...
in the ``endian_swapper`` example: .. code-block:: python3 classEndianSwapper(object): def __init_(self, dut, debug=False): selfdut = dut self.stream_in = AvalonST(dut, "streamin", dut.clk) async def run_test(dut, data_in=None, configcoroutine=None, idle_inserter=...
The Verilog language allows access to any signal from any other hierarchical block without having to route it via the interface. This means you can use hierarchical notation to either assign or determine the value of a signal in the design hierarchy from a testbench. This ...
SystemVerilog initial value affected by multiple driver error Question: Within my programming, a block of code, identified asalways_comb, has been implemented in the following manner: always_comb begin if ( x == 0 ) z = some_value ; ...
140 + // (* RAM_STYLE="BLOCK" *) 141 + reg [DATA_WIDTH-1:0] mem[(2**VALID_ADDR_WIDTH)-1:0]; 142 + 143 + wire [VALID_ADDR_WIDTH-1:0] s_axi_awaddr_valid = s_axi_awaddr >> (ADDR_WIDTH - VALID_ADDR_WIDTH); 144 + wire [VALID_ADDR_WIDTH-1:0] s_axi_araddr_...