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你好我关于cmd_ctrl有一处语法看不懂 #6

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lv2dog opened this issue Apr 9, 2023 · 1 comment

lv2dog commented Apr 9, 2023

94行 if(~busy) begin
if(start) busy <= '1;
。。。
end

我看了整个代码发现busy初值为0 唯一一个赋值为1的就在满足~busy时才执行
这样busy会不会没有变化导致触发不了呢

ThinkCodeStudio commented Nov 13, 2023

没有问题, busy为"0", ~busy取反为 "1" if(~busy)是一直触发的, 直到 start 收到一个信号, busy赋值 "1", 跳出if(~busy)

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