verilog程序-流水灯

1、ver i I og程序-流水灯-CAL-FENGHAI-(2020YEAR-YICAIE.程序功能：流水灯版本：版权：分享快乐module liu_shui_deng( in put wire pin_clk_in, in put wire pin_rest _n , in put wire 1:0 pin_ctrl,output reg 7:0 pin_led_out ); -wire elk;reg 31: 0 counter32;always (posedge pin_clkn or negedge pin_rest_n) begin if(pin_rest_n=lb0) begin

2、counter32 = 32b0;endelse begincounter32 = counter32+lbl;endend assign elk = counter323;reg 2:0 cur_sta,stateparameter 2:0 IDLE =3b000;parameter 2:0 RIGHT =5,b001;parameter 2:0 LEFT =5*6010;parameter 2:0 DOUB_LEFT =5b011;parameter 2:0 ERROR =5*6100;always (posedge elk or negedge pin_rest_n) begin讦(pi

3、n_rest_n=lb0) beginstate = IDLE;endelse begincase (state)IDLE : beginif (pin_ctrl=2,b00) beginstate = LEFT;endelse if (pin_ctrl=2b01) beginstate = RIGHT;endelse if (pin_ctrl=2,bl0) beginstate = DOUB LEFT /endelse beginstate = ERROR;endendLEFT : beginif (pin_ctrl=2,b00) begin state = LEFT;ende,se (pi

4、n_ctrl=2,b01) begin state = RIGHT;ende,se if (Pin_ctrl=2bl0) begin state = DOUB LEFT /endelse beginstate = ERROR;endendRIGHT : beginif (pin_ctrl=2b00) begin state = LEFT;ende,se 讦(pin_ctrl=2,b01) begin state = RIGHT;ende,se if(pin_ctrl=2blO) begin state = DOUB LEFT /endelse beginstate = ERROR;endend

5、DOUB_LEFT： beginif (pin_ctrl=2b00) begin state = LEFT;ende,se if (pin_ctrl=2b01) begin state = RIGHT;endelse if (pin.ctrl=2,bl0) begin state = DOUB_LEFT;endelse begi nstate = ERROR;endendERROR : begin讦(pin_ctrl=2,b00) beginstate = LEFT;endelse 讦(pin_ctrl=2,b01) beginstate = RIGHT;endelse if (pin_ctr

6、l=2bl0) beginstate = DOUB_LEFT;endelse begi nstate = ERROR;endenddefault: state = IDLE ;endcaseendendalways (posedge elk or negedge pin_rest_n) beginif (pin_rest_n = UbO) beginpined_out7:0v=8b0000_0000;endelse begincase (state)IDLE : beginpinjed_out 7:0 =8b0000_0000;endLEFT : beginif(pined_out0+pine

7、d_out +pined_out2+pined_out +pined_out4+pin_led_out5+pinJed_out6+pinJed_out7)!=8,dl) beginpined_out7:0 = 8b0000_0001;endelse beginpined_out7:l = pined_out6:0;pined_out0 = pinjed_out7; endendRIGHT: beginif(pined_out0+pined_outl+pined_out2+pined_out3+pined_out4+pin_led_out5+pinJed_out6+pin_led_out7)!=

8、8,dl) begin pinjed_out 7:0 = 8b0000_0001; endelse beginpin_led_out 6:0 = pined_out 7:1; pin_led_out =pinjed_out 0;endendDOUBLEFT: beginif(pined_out0+pined_out +pined_out2+pined_out3+pin_led_out4+pin_led_out5+pinJed_out6+pin_led_out7)!=8d2 ) begin pinjed_out 7:0 = 8b0000_0011;endelse beginpin_led_out 7:1 = pined_out 6:0; pin_led_out