谢谢您的回复.我用的是Quartus II 4.1, 在其中的help文档中就显示了不支持这些语句啊.我把有关的内容拷贝如下:
Section Verilog HDL Construct Quartus II Support Note (1)
9.2 Procedural Assignments Supported as defined in subsections 9.2.1 and 9.2.2.
9.2.1 Blocking Procedural Assignments Supported.
9.2.2 Nonblocking Procedural Assignments Supported.
9.3 Procedural Continuous Assignments Not supported.
9.3.1 Assign and Deassign Procedural Continuous Assignments Not supported.
9.3.2 Force and Release Procedural Continuous Assignments Not supported.
9.4 Null Statements Supported for all statements except For Statements.
9.4 Conditional Statements(If-Else Statements) Supported.
9.5 Case Statements Supported.
9.6 Looping Statements Supported.
9.7 Procedural Timing Controls Supported as defined in subsections 9.7.1 through 9.7.6.
9.7.1 Delay Controls Not supported.
9.7.2 Event Controls Supported at the top of Always Constructs only.
9.7.3 Named Events Not supported.
9.7.4 Event or Operators Supported.
9.7.5 Level-Sensitive Event Controls (Wait Statements) Not supported.
9.7.6 Intra-Assignment Timing Controls Not supported.
9.8 Block Statements Supported as defined in subsections 9.8.1 and 9.8.2.
9.8.1 Sequential Blocks (Begin-End Blocks) Supported.
9.8.2 Parallel Blocks (Fork-Join Blocks) Not supported.
9.9 Behavioral Constructs Supported as defined in subsections 9.9.1 and 9.9.2.
9.9.1 Initial Constructs Not supported. Ignored for synthesis.
9.9.2 Always Constructs Supported.作者: chaoswang 时间: 2004-9-22 15:22
