VHDL中attribute keep of xxx: signal is "true";的用法
attribute keep of error_channelb: signal is "true"; 用法就是 keep a signal after mapping; 如果要用chipscope和在ucf文件中直接使用信號名的,可用keep這保持,這樣可方便我們添加觀察信號和添加約束 ...
原文：Signal in unit is connected to following multiple drivers VHDL
參考鏈接 https: blog.csdn.net jbb article details 出錯原因 兩個Process都對LDS temp進行了賦值，萬一在某個時刻，在兩個Process中對LDS temp賦值條件都滿足，那么你讓FPGA該怎么做呢 讓它聽誰哪個Process塊的呢 報錯 ISE . 綜合時報錯 出錯代碼 ...
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TYPE 數據類型名 IS 數據類型定義 OF 基本數據類型 TYPE 數據類型名 IS 數據類型定義 常用的用戶自定義的數據類型有枚舉型，數組型，記錄型。其中枚舉型的在狀態機的描述中經 ...