1、一 Vhdl 语言中1 提示: VHDL syntax error:expected choice in case statement Case 语句中没覆盖到所有的情况,要加 when others=null;二在 verge hdl 语句中在 QuartusII 下进行编译和仿真的时候 , 会出现一堆 warning, 有的可以忽略 , 有的却需要注 意,虽然按F1可以了解关于该警告的帮助,但有时候帮助...
I need to assign values to multiple signals in CASE statement, something like this :CASE input24 IS WHEN "00" THEN output0 <= '1' ; output1 <= '0' ; output2 <= '0' ; output3 <= '0' ; WHEN "01" THEN output0 <= '0' ; output1 <= '1' ; output2 <= '0' ; output3...
(1) 能够进行并行处理的语句有:process -进程语句Concurrent signal assignment-并发信号代入语句 Concurrent procedure call-并发过程调用语句Block-模块语句Assert-并行断言语句Generate-重复结构生成语句Generic-元件参数化语句(2) 顺序语句列述如下:Variable assignment statement -变量的赋值语句Signal assignment statement...
Concurrent signal assignment Case statement Process statementsAnswer: C) Process statementsExplanation:Process statements define the sequential behavior of an architecture.Discuss this Question 31. Which of the following cannot be used as the name of the architecture in VHDL?
25 Error: VHDL error at shift_reg.vhd(24): cant synthesize logic for statement with conditions that test for the edges of multiple clocks ---同一进程中含有两个或多个if(edge)条件,(一个进程中之能有一个时钟沿) 26 Error: Cant resolve multiple constant drivers for net datain_reg[22] at s...
只是你在使用case或with_select语句的时候,没有将表达式时的所有值都列举出来。最后一个条件改成when others=>……就可以了。
意思是说你OUTPUT是在IF或者CASE结构里被赋了几次值,这样是不行的,也就是你的OUTPUT赋值语句不要写在IF或者CASE里面,会冲突的 要解决这个问题,你可以把IF或CASE里面的赋值用一个信号来代替,然后再进程最后把信号的值赋值给OUTPUT就行了
32.sequential statement(顺序语句)有if statement,case statement,loop statement,next statement,exit statement,wait statement,return,null 33.两种电路的区别 34.选择题考encoder和decoder要看清楚 inputs是 的是decoder inputs是 的是encoder 计算机存储信息和传输信息都是binary codes,所以encoder是为了 方便 ...
(eureka = PassingLine)) then new_StoredValue <= sensor_r_out & sensor_m_out & sensor_l_out; end if; case state is when FindLine_state => pwm_l_reset <= '0'; pwm_r_reset <= '0'; pwm_l_direction <= '1'; pwm_r_direction <= '0'; count_reset <= '0'; if (count_...
process (state, input) begin case state is when s0 => if input = '1' then next_state <= s1; -- 根据输入信号转移至下一个状态 else next_state <= s0; -- 如果输入信号不满足条件,保持在当前状态 end if; when s1 => if input = '0' then ...