verilog程序-流水灯

《verilog程序-流水灯》由会员分享，可在线阅读，更多相关《verilog程序-流水灯（5页珍藏版）》请在装配图网上搜索。

1、/*程序功能：流水灯 版本：版权：分享快乐*/module liu_shui_deng(input wire pin_clk_in,input wire pin_rest_n,input wire 1:0 pin_ctrl,&output reg 7:0 pin_led_out );wire clk;reg 31:0 counter32;always (posedge pin_clk_in or negedge pin_rest_n)begin if(pin_rest_n=1b0)begin counter32=32b0;end else begin counter32=counter32+1

2、b1;end end assign clk=counter323;reg 2:0 cur_sta,state¶meter 2:0 IDLE =3b000;parameter 2:0 RIGHT =5b001;parameter 2:0 LEFT =5b010;parameter 2:0 DOUB_LEFT=5b011;parameter 2:0 ERROR =5b100;always (posedge clk or negedge pin_rest_n)begin if(pin_rest_n=1b0)begin;state=IDLE;end else begin case(state)

3、IDLE:begin if(pin_ctrl=2b00)begin state=LEFT;end else if(pin_ctrl=2b01)begin state=RIGHT;end else if(pin_ctrl=2b10)begin state=DOUB_LEFT;end else begin state=ERROR;|end end LEFT:begin if(pin_ctrl=2b00)begin state=LEFT;end else if(pin_ctrl=2b01)begin；state=RIGHT;end else if(pin_ctrl=2b10)begin state=

4、DOUB_LEFT;end else begin state=ERROR;end end RIGHT:begin if(pin_ctrl=2b00)begin state=LEFT;end else if(pin_ctrl=2b01)begin state=RIGHT;end|else if(pin_ctrl=2b10)begin state=DOUB_LEFT;end else begin state=ERROR;end end DOUB_LEFT:begin if(pin_ctrl=2b00)begin state=LEFT;end else if(pin_ctrl=2b01)begin

5、state=RIGHT;end else if(pin_ctrl=2b10)begin，state=DOUB_LEFT;end else begin state=ERROR;end end ERROR:begin if(pin_ctrl=2b00)begin state=LEFT;end else if(pin_ctrl=2b01)begin state=RIGHT;end else if(pin_ctrl=2b10)begin state=DOUB_LEFT;end！else begin state=ERROR;end end default:state=IDLE;endcase end e

6、nd】always (posedge clk or negedge pin_rest_n)begin if(pin_rest_n=1b0)begin pin_led_out7:0=8b0000_0000;end else begin case(state)IDLE:begin pin_led_out 7:0=8b0000_0000;end LEFT:begin if(pin_led_out0+pin_led_out1+pin_led_out2+pin_led_out3+pin_led_out 4+pin_led_out5+pin_led_out6+pin_led_out7)!=8d1)begi

7、n pin_led_out7:0=8b0000_0001;end else begin：pin_led_out7:1=pin_led_out6:0;pin_led_out0=pin_led_out7;end end RIGHT:begin if(pin_led_out0+pin_led_out1+pin_led_out2+pin_led_out3+pin_led_out 4+pin_led_out5+pin_led_out6+pin_led_out7)!=8d1)begin pin_led_out 7:0=8b0000_0001;end else begin pin_led_out 6:0=p

8、in_led_out 7:1;pin_led_out 7=pin_led_out 0;end end DOUB_LEFT:begin if(pin_led_out0+pin_led_out1+pin_led_out2+pin_led_out3+pin_led_out 4+pin_led_out5+pin_led_out6+pin_led_out7)!=8d2)begin pin_led_out 7:0=8b0000_0011;end else begin pin_led_out 7:1=pin_led_out 6:0;pin_led_out 0=pin_led_out 7;end end ERROR:begin pin_led_out 7:0=8b1111_1111;end default:pin_led_out 7:0=8b0000_0000;endcase end end endmodule