《FPGA应用开发和仿真》(机械工业出版社2018年第1版 ISBN:9787111582786)的源码。Source Code of the book FPGA Application Development and Simulation(CHS). fpgai2cdspverilogspifftuartsystemverilogddsdigital-signal-processingiirfirmodelsimmodulationqamcordiccici2saxi4adpll ...
总线上挂3个信号A,B,C,请求信号req[2:0],仲裁结果grant[2:0],req[2]对应A的总线请求,最高优先级,req[1]对应B的总线请求,req[0]对应C的总线请求,最低优先级。 grant[2:0]=2’b100,A获得总线;grant[2:0]=2’b010,B获得总线; grant[2:0]=2’b001,C获得总线 1.4.1 固定优先级1 module fix_a...
Write code for 2:1 MUX using different coding methods. Write code for a parallel encoder and a priority encoder. What is the difference between === and == ? What is defparam used for ? What is the difference between unary and logical operators ? What is the difference between tasks and...
The following is a code snippet I tried to make a table and write some parameters But as long as the parameter has spaces, it will be wrong I went through the console and found that the result is str2... C - add print to file option at the end of a function ...
根据前面的练习(always_case2),case语句中有256个case。如果支持的case语句中的case项不属于非关键位,我们可以将其减少到9个case。这就是casez的作用:在比较中,它将具有值z的位视为不需要。 For example, this would implement the 4-input priority encoder from the previous exercise: ...
4) for通过以下三个步骤来决定语句的循环执行。 a) 先给控制循环次数的变量赋初值。 b) 判定控制循环的表达式的值,如为假则跳出循环语句,如为真则执行指定的语句后,转到第三步。 c) #1:当为时序逻辑建模,使用“非阻塞赋值”。 #2:当为锁存器(latch)建模,使用“非阻塞赋值”。 #3:当用always块为组合...
// Priority Encoder Example - Usage of case // Verilog Tutorial module priory_encoder_case ( input wire [4:1] x, output reg [2:0] pcode ); always @ * case (x) 4'b1000, 4'b1001 , 4'b1010, 4'b1011 , 4'b1100 , 4'b1101, 4'b1110 , 4'b1111 : pcode = 3'b100; ...
Parentheses may be omitted if the code formatting conveys the same information, for example when describing a priority mux. 👍 assign foo = condition_a ? a : condition_b ? b : not_a_nor_b; Comments C++ style comments (// foo) are preferred. C style comments (/* bar */) can also...
If-else and case: If-else statement generally synthesize priority encoding logic. Although system verilog allow you to control priority encoder logic. Example: unique if (in1) sel = 2’b01; Else if (in2) sel = 2’b11; …… If you use priority construct, instead of unique in system ve...