diff options
Diffstat (limited to 'part_2/ex9/fsm.v')
| -rw-r--r-- | part_2/ex9/fsm.v | 245 |
1 files changed, 245 insertions, 0 deletions
diff --git a/part_2/ex9/fsm.v b/part_2/ex9/fsm.v new file mode 100644 index 0000000..2e3888a --- /dev/null +++ b/part_2/ex9/fsm.v @@ -0,0 +1,245 @@ +module fsm(
+ input CLOCK_MS,
+ input CLOCK_HS,
+
+ input KEY,
+ input TIME_OUT,
+
+ output reg START_DELAY,
+ output reg EN_LFSR,
+ output reg [9:0] LEDR,
+ output reg COUNT,
+ output reg COUNT_CLEAR
+);
+ reg [3:0] state;
+
+ parameter wait_key_press=0, wait_key_release=1, led_one=2, led_two=3, led_three=4, led_four=5, led_five=6, led_six=7, led_seven=8, led_eight=9, led_nine=10, led_ten=11, delay=12, led_zero=13, response=14, response_end=15;
+
+ always @ (state)
+ begin
+ case (state)
+ wait_key_press:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b0;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ wait_key_release:
+ begin
+ EN_LFSR <= 1'b1;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b0;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b1;
+ end
+ led_zero:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b0;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ led_one:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b1000000000;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ led_two:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b1100000000;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ led_three:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b1110000000;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ led_four:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b1111000000;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ led_five:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b1111100000;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ led_six:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b1111110000;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ led_seven:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b1111111000;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ led_eight:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b1111111100;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ led_nine:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b1111111110;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ led_ten:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b1111111111;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ delay:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b1;
+ LEDR [9:0] <= 10'b1111111111;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ response:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b1;
+ LEDR [9:0] <= 10'b0;
+ COUNT <= 1'b1;
+ COUNT_CLEAR <= 1'b0;
+ end
+ response_end:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b0;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ default:
+ begin
+ EN_LFSR <= 1'b0;
+ START_DELAY <= 1'b0;
+ LEDR [9:0] <= 10'b0;
+ COUNT <= 1'b0;
+ COUNT_CLEAR <= 1'b0;
+ end
+ endcase
+ end
+
+ always @(posedge CLOCK_MS)
+ begin
+ case (state)
+ wait_key_press:
+ if (~KEY)
+ state = wait_key_release;
+ else
+ state = wait_key_press;
+ wait_key_release:
+ if (KEY)
+ state = led_zero;
+ else
+ state = wait_key_release;
+ led_zero:
+ if (CLOCK_HS)
+ state = led_one;
+ else
+ state = led_zero;
+ led_one:
+ if (CLOCK_HS)
+ state = led_two;
+ else
+ state = led_one;
+ led_two:
+ if (CLOCK_HS)
+ state = led_three;
+ else
+ state = led_two;
+ led_three:
+ if (CLOCK_HS)
+ state = led_four;
+ else
+ state = led_three;
+ led_four:
+ if (CLOCK_HS)
+ state = led_five;
+ else
+ state = led_four;
+ led_five:
+ if (CLOCK_HS)
+ state = led_six;
+ else
+ state = led_five;
+ led_six:
+ if (CLOCK_HS)
+ state = led_seven;
+ else
+ state = led_six;
+ led_seven:
+ if (CLOCK_HS)
+ state = led_eight;
+ else
+ state = led_seven;
+ led_eight:
+ if (CLOCK_HS)
+ state = led_nine;
+ else
+ state = led_eight;
+ led_nine:
+ if (CLOCK_HS)
+ state = led_ten;
+ else
+ state = led_nine;
+ led_ten:
+ if (CLOCK_HS)
+ state = delay;
+ else
+ state = led_ten;
+ delay:
+ if (TIME_OUT)
+ state = response;
+ else
+ state = delay;
+ response:
+ if (~KEY)
+ state = response_end;
+ else
+ state = response;
+ response_end:
+ if (KEY)
+ state = wait_key_press;
+ else
+ state = response_end;
+ endcase
+ end
+endmodule
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