TA的每日心情 | 奋斗 2022-1-21 15:15 |
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签到天数: 1 天 [LV.1]初来乍到
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一个always里是不能放两个posedge触发信号(除了有些高电平reset)的,因为这在硬件上实现不了;% O d" H% m4 |7 Z6 a
可以这样:$ Y- H v# I. A6 I
always@(posedge clk)
( g# c" t' t8 M0 z6 X; w, f. Hcount_a <= count_a + 1;- f. I6 B0 X' Q2 e: @) r' f# c
8 r. ?) |' ]0 @1 k6 d% y- J
always@(posedge add)
& [4 |( i j. C& xcount_b <= count_b + 1;, x' \ j7 i# e$ \" n/ E4 E
9 E+ _. \- ]6 S7 C" T- qassign count = count_a + count_b;/ ]- d, V+ p0 c) s& a! g. q
或者用clk去采样add,做边沿检测,这就要求clk频率比add高很多) l& I& K. n0 Q' {
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