有可以帮我解释下超声波测距的这段代码是啥意思不

Question

always@(*)
if(!rst_n)
next_state<=IDLE;
else
case(cur_state)
IDLE :begin
next_state=TRIG;
end
TRIG :begin
if(cnt==TIME_10us-1)
next_state=ECHO;
else
next_state=cur_state;
end
ECHO :begin
if(cnt==TIME_80ms-1)
next_state=IDLE;
else
next_state=cur_state;
end
endcase

Answer 1

这一小段代码只是状态机的一部分
代码太少，没办法描述代码的实际意思