RTL代码并不是写好了就天然能变成波形的。而仿真器一般就是编译器,例如Verilator,就是把Verilog按照综合(Synthesis)语法、行为规范,翻译成C++代码。不同位宽的线与寄存器声明映射为C++中的不同的数据类型与结构,Module可以映射为类(Class),Always块、赋值、表达式可以映射为函数、普通运算表达式。如图10所示,仿真过程就...
While it is true that verification engineers should use assertions to their full potential, there are many simple SystemVerilog Assertions that designers can--and should--be adding directly into the RTL code as it is written. This paper discusses where embedded RTL assertions can be useful, and...
There are only a couple of hardware modifications to make. First, there was a timeout in the Verilog code that causes it to finish before the software is done so this is removed. Then I put in the monitor to watch for the secret write from the software that signals the end of the pr...
A testbench is simply a Verilog module. But it is different from the Verilog code we write for a DUT. Since the DUT’s Verilog code is what we use for planning our hardware, it must be synthesizable. Whereas, a testbench module need not be synthesizable. We just need to simulate it ...
Below is my Verilog code to generate the clock based on your formula. From the Verilog code, in order for me to generate a 200 MHz clk_out, I need to actually generate a 400 MHz clock and toggle it to get 200 MHz. And at high clock rates (~100 MHz and up), the outp...
To generate a DPI testbench for the SystemVerilog code, follow these instructions: 1-6 1 Open the configuration parameters for your model. 2 On the left pane, select HDL Code Generation. Set Language to SystemVerilog. 3 On the left pane, expand HDL Code Generation and select Test Bench. ...
Still, you've hit upon a good technique for debugging your RTL more deeply within your Verilog testbench itself. In VHDL, you're simply stuck with adding internal nodes to the waveform viewer or manually routing them to the design boundary, even when debugging...
11 Sign-off Qualit y Good – Because almost complete code can be tested without stubbing any DUT module. Good – Because thorough testing can be done in stipulated time and L3 use cases to regress various data paths can be swiftly covered. Best. Because we don’t rely on any mimicry of...
A fantastic free resource that all FPGA front end developers need to be aware of is “fizzim”. It is a tool that automatically writes VHDL/Verilog code for your state machine provided that you draw the state machine for the tool.
First off, this is very interesting post to explain the basic. It’s appreciated! Secondly, any chance you could post your test bench for this code, the one I write is giving me different results and I cannot see why. Thanks and keep up the good work!