在Verilog中，wire永远是wire，就是相当于一条连线，用来连接电路，不能存储数据，无驱动能力，是组合逻...
wire Z, A, B ; assign #10 Z = A & B ; //隐式时延,声明一个wire型变量时对其进行包含一定时延的连续赋值。 wire A, B; wire #10 Z = A & B; //声明时延,声明一个wire型变量是指定一个时延。因此对该变量所有的连续赋值都会被推迟到指定的时间。除非门级建模中,一般不推荐使用此类方法建模。
Switch-level option added to Verilog simulation.Features the RCsim from interHDL, a switch-level simulation option for the Viper Verilog HDL simulator. Functions and features; Contact information.EDNLipmanJimGranvilleFran
//(2) state switch, using block assignment for combination-logic //all case items need to be displayed completely always@(*)begin //st_next = st_cur ;//如果条件选项考虑不全,可以赋初值消除latch case(st_cur) IDLE: case(coin) 2'b01:st_next=GET05; 2'b10:st_next=GET10; default:st_...
//(2) state switch, using block assignment for combination-logic //all case items need to be displayed completely always @(*) begin //st_next = st_cur ;//如果条件选项考虑不全,可以赋初值消除latch case(st_cur) IDLE: case (coin) ...
这样可以确定相位不变,将counter_2与counter_1互换则可以移动180°。这里的实现方法延迟有点高,再增加一个always@(posedge rst)专门调整switch理论上可以缩短这个延迟,但是有点冗杂。感觉如果做到那种程度倒不如直接上锁相环算了,就没继续。 testbench不变,我在这边为了方便调试多做了两个测试接口,最后仿真结果如下...
连续赋值语句是 Verilog 数据流建模的基本语句,用于对 wire 型变量进行赋值。: assign LHS_target = RHS_expression ; LHS(left hand side) 指赋值操作的左侧,RHS(right hand side)指赋值操作的右侧。 assign 为关键词,任何已经声明 wire 变量的连续赋值语句都是以 assign 开头,例如: ...
使用case语句可以实现类似C语言switch的效果,但是不一样的是,C语言是从某句代码往下执行,遇到break跳出,但Verilog每个‘case’只执行一次,所以不需要break。 // eg7:always module Learn_Verilog( ... always @(*) begin case(out_always_ff) 1'b1: out2 = out_assign; 1'b0: out2 = out_always_comb;...
these races will frequently lead to different simulation results when a design is simulated by simulators from different vendors. VeriLogger has always been pretty useful for detecting simulation races, because our BugHunter GUI allows you to switch back and forth between our simulator (Simx) and ...
„VerilogHDL: behavior level, RTL level, gate level, switch level, not supported: circuit level (spice), layout level (GDSII/CIF) Use Verilog HDL is a hardware description language developed on the basis of the most widely used C language. It was first created by PhilMoorby of GDA (Gat...