always @(posedge clk or negedge rst_n) if(!rst_n) cstate <= K_IDLE; else cstate <= nstate; always @(cstate or keyh_value or key_h) case(cstate) K_IDLE: if(keyh_value != 4'b0000) nstate <= K_H1OL; else nstate <= K_IDLE; K_H1OL: nstate <= K_H2OL; K_H2OL: if(key_h != 4'b1111) nstate <= K_IDLE; else nstate <= K_H3OL; K_H3OL: if(key_h != 4'b1111) nstate <= K_IDLE; else nstate <= K_H4OL; K_H4OL: if(key_h != 4'b1111) nstate <= K_IDLE; else nstate <= K_CHCK; K_CHCK: nstate <= K_IDLE; default: ; endcase reg[3:0] new_value; reg new_rdy;
时间: 2024-03-31 20:32:02 浏览: 55
half_clk.zip_half_clk_halfclk
这是一个 Verilog 代码段,描述的是一个状态机的行为。该状态机有几个状态,如 K_IDLE,K_H1OL,K_H2OL 等等。每当时钟信号或复位信号发生变化时,状态机会根据当前状态和输入值(keyh_value 和 key_h)来计算下一个状态(nstate)。同时,代码中还定义了一些寄存器变量 new_value 和 new_rdy,但是没有对它们进行操作。
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