testbench按键

在给出的引用中，提到了testbench中的按键。根据引用中的代码，testbench中的按键是一个4位的输入信号，用来模拟按键的状态。每一位代表一个按键，当按键按下时，对应的位为0，弹起时为1。在testbench的初始过程中，通过改变key的值来模拟按键的操作。例如，key=4'b0101表示按下了按键2和按键0。所以，在testbench中，按键的操作是通过改变key的值来模拟的。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* *3* [FPGA_demo2:按键测试](https://blog.csdn.net/weixin_50774105/article/details/123966418)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
- *2* [按键抖动仿真Testbench（repeat、task、random）的用法](https://blog.csdn.net/ciscomonkey/article/details/86516236)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
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