我这段verilog为什么报错 i is not a constant？改成[(i*8-8)+:8]试试。不过还有很多其他问题，...
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wire a_not, b_not; //每个实例必须有不同的实例化名称 not a_inv (a_not, a); not b_inv (b_not, b); and a1 (x, a_not, b); and a2 (y, b_not, a); or out (c, x, y); endmodule 3.Verilog参数 参数化代码提高了可读性和代码紧凑型、容易维护和再使用。一个Verilog参数(paramet...
moduleHalfAdder(A,B,Sum,Carry);inputA,B;output Sum,Carry;assign #2Sum=A^B;assign #5Carry=A&B;endmodule 模块的名字是 HalfAdder。模块有 4 个端口:两个输入端口 A 和 B,两个输出端口 Sum 和Carry。由于没有定义端口的位数,所有端口大小都为 1 位;同时由于没有各端口的数据类型说明,这 4 个端口...
由于在FPGA开发过程中,多人合作时可能遇到有人使用verilog hdl,有人遇到VHDL的情况,这就涉及到了verilog hdl与VHDL的相互调用。 本文就是介绍verilog hdl与VHDL混合使用的方法,比给出示例。包括两个方面: 1)Verilog hdl调用VHDL代码; 2)VHDL调用veriolg hdl代码。
18.Warning: Using design file lpm_fifo0.v, which is not specified as a design file for the current project, but contains definitions for 1 design units and 1 entities in project Info: Found entity 1: lpm_fifo0 原因:模块不是在本项目生成的,而是直接copy了别的项目的原理图和源程序 而生成的...
如果端口声明不包括线网类型或变量类型,则可以再次在线网类型或可变类型声明中声明端口。 module test (input [7:0] a, // a, e are implicity declared of type wire output [7:0] c); reg [7:0] e; // no problem, reg was not declared before // other design code endmodule 编辑...
Of particular interest is the page of links to the IEEE Verilog Standardization Group's web pages, which ishere. Also of interests are a number of other verilog related resources which are available here; including an free editing mode for the verilog lanugage; links to various books that we...
parameter ADCDPF =32'hFF7A; // alternative digital power supply voltage monitor config (ADP_SAR) parameter _90FSYSCLKS = "Disabled"; // unused 1 byte register at offset 0x90 from FSMC_NORSRAM Timing Control Register. Read as zero if not used ...
位(BIT)数据类型说明 TYPE BIT_VECTOR IS ARRAY (Natural Range ) OF BIT; 位矢量是位数据类型的数组 27、使用位矢量必须注明位宽 例如: SIGNAL a : BIT_VECTOR(7 DOWNTO 0)5. 位矢量(BIT_VECTOR)类型说明 TYPE CHARACTER IS(ASCII码字符表中的全部字符) 字符类型(Character)由单引号括起来 字符类型区分...