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December 2, 2013 01:27
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Conway's Game of Life in Verilog
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| /***** | |
| * | |
| * CSC258, Fall 2013 | |
| * Conway's Game of Life | |
| * By: Spencer Elliott (999992539), Dean Britto (999895298) | |
| * | |
| *****/ | |
| /** | |
| * Main module to be instantiated in a project that uses a VGA controller | |
| */ | |
| module game_of_life(KEY, CLOCK_50, x, y, r, g, b); | |
| // KEYs are used to reset and cycle through presets | |
| input [3:0] KEY; | |
| // CLOCK_50 is used as a seed for the slower clock which controls the speed of Life generations | |
| input CLOCK_50; | |
| // x and y are pixel coordinates on the 640-by-480 VGA display | |
| input [9:0] x, y; | |
| // r, g, and b represent the colour of each pixel on the VGA display | |
| output [9:0] r, g, b; | |
| /** | |
| * cells determines whether a square is on or off. | |
| * For example, | |
| * cells[4] == 1 means the square at the 5th column, 1st row is on. | |
| * cells[454] == 1 means the square at the 7th column (454 % 64 + 1 == 7), 9th row (454 / 48 == 9) is on. | |
| */ | |
| wire [0:64*48-1] cells; | |
| // cells_reset_state and cells_preset represent the state to | |
| // return all cells to when the reset KEY is pressed | |
| wire [0:64*48-1] cells_reset_state; | |
| reg [0:64*48-1] cells_preset; | |
| reg [3:0] preset_state; | |
| initial begin | |
| // When the program is loaded, start with the first preset | |
| cells_preset[0 :64*0+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*1 :64*1+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*2 :64*2+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*3 :64*3+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*4 :64*4+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*5 :64*5+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*6 :64*6+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*7 :64*7+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*8 :64*8+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*9 :64*9+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*10:64*10+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*11:64*11+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*12:64*12+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*13:64*13+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*14:64*14+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*15:64*15+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*16:64*16+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*17:64*17+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*18:64*18+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*19:64*19+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*20:64*20+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*21:64*21+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*22:64*22+63] <= 64'b0000000000000000000000000110010000000000000000000000000000000000; | |
| cells_preset[64*23:64*23+63] <= 64'b0000000000000000000000000100010000000000000000000000000000000000; | |
| cells_preset[64*24:64*24+63] <= 64'b0000000000000000000000000100110000000000000000000000000000000000; | |
| cells_preset[64*25:64*25+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*26:64*26+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*27:64*27+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*28:64*28+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*29:64*29+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*30:64*30+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*31:64*31+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*32:64*32+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*33:64*33+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*34:64*34+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*35:64*35+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*36:64*36+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*37:64*37+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*38:64*38+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*39:64*39+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*40:64*40+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*41:64*41+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*42:64*42+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*43:64*43+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*44:64*44+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*45:64*45+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*46:64*46+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*47:64*47+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| preset_state <= 2; | |
| end | |
| // When KEY[2] is pressed, cycle through presets | |
| always @(posedge KEY[2]) begin | |
| if (preset_state == 1) begin | |
| cells_preset[0 :64*0+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*1 :64*1+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*2 :64*2+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*3 :64*3+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*4 :64*4+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*5 :64*5+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*6 :64*6+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*7 :64*7+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*8 :64*8+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*9 :64*9+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*10:64*10+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*11:64*11+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*12:64*12+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*13:64*13+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*14:64*14+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*15:64*15+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*16:64*16+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*17:64*17+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*18:64*18+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*19:64*19+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*20:64*20+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*21:64*21+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*22:64*22+63] <= 64'b0000000000000000000000000110010000000000000000000000000000000000; | |
| cells_preset[64*23:64*23+63] <= 64'b0000000000000000000000000100010000000000000000000000000000000000; | |
| cells_preset[64*24:64*24+63] <= 64'b0000000000000000000000000100110000000000000000000000000000000000; | |
| cells_preset[64*25:64*25+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*26:64*26+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*27:64*27+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*28:64*28+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*29:64*29+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*30:64*30+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*31:64*31+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*32:64*32+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*33:64*33+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*34:64*34+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*35:64*35+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*36:64*36+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*37:64*37+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*38:64*38+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*39:64*39+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*40:64*40+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*41:64*41+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*42:64*42+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*43:64*43+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*44:64*44+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*45:64*45+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*46:64*46+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*47:64*47+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| preset_state <= 2; | |
| end else if (preset_state == 2) begin | |
| cells_preset[0 :64*0+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*1 :64*1+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*2 :64*2+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*3 :64*3+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*4 :64*4+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*5 :64*5+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*6 :64*6+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*7 :64*7+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*8 :64*8+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*9 :64*9+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*10:64*10+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*11:64*11+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*12:64*12+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*13:64*13+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*14:64*14+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*15:64*15+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*16:64*16+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*17:64*17+63] <= 64'b0000000000000001100000000110000000000000000000000000000000000000; | |
| cells_preset[64*18:64*18+63] <= 64'b0000000000000001100000001000000000000000000000000000000000000000; | |
| cells_preset[64*19:64*19+63] <= 64'b0000000000000000000000000001000000000000000000000000000000000000; | |
| cells_preset[64*20:64*20+63] <= 64'b0000000000000000000000011010000000000000000000000000000000000000; | |
| cells_preset[64*21:64*21+63] <= 64'b0000000000000000000000011000000000000000000000000000000000000000; | |
| cells_preset[64*22:64*22+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*23:64*23+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*24:64*24+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*25:64*25+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*26:64*26+63] <= 64'b0000000000000000000000110000000000000000000000000000000000000000; | |
| cells_preset[64*27:64*27+63] <= 64'b0000000000000000000010110000000000000000000000000000000000000000; | |
| cells_preset[64*28:64*28+63] <= 64'b0000000000000000000100000000000000000000000000000000000000000000; | |
| cells_preset[64*29:64*29+63] <= 64'b0000000000000000000000100000001100000000000000000000000000000000; | |
| cells_preset[64*30:64*30+63] <= 64'b0000000000000000000011000000001100000000000000000000000000000000; | |
| cells_preset[64*31:64*31+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*32:64*32+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*33:64*33+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*34:64*34+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*35:64*35+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*36:64*36+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*37:64*37+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*38:64*38+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*39:64*39+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*40:64*40+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*41:64*41+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*42:64*42+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*43:64*43+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*44:64*44+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*45:64*45+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*46:64*46+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*47:64*47+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| preset_state <= 3; | |
| end else if (preset_state == 3) begin | |
| cells_preset[0 :64*0+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*1 :64*1+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*2 :64*2+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*3 :64*3+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*4 :64*4+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*5 :64*5+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*6 :64*6+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*7 :64*7+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*8 :64*8+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*9 :64*9+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*10:64*10+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*11:64*11+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*12:64*12+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*13:64*13+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*14:64*14+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*15:64*15+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*16:64*16+63] <= 64'b0000000000000000000011000000110000000000000000000000000000000000; | |
| cells_preset[64*17:64*17+63] <= 64'b0000000000000000000100100001001000000000000000000000000000000000; | |
| cells_preset[64*18:64*18+63] <= 64'b0000000000000000000101000000101000000000000000000000000000000000; | |
| cells_preset[64*19:64*19+63] <= 64'b0000000000000000011001110011100110000000000000000000000000000000; | |
| cells_preset[64*20:64*20+63] <= 64'b0000000000000000100000010010000001000000000000000000000000000000; | |
| cells_preset[64*21:64*21+63] <= 64'b0000000000000000101100000000001101000000000000000000000000000000; | |
| cells_preset[64*22:64*22+63] <= 64'b0000000000000000010100000000001010000000000000000000000000000000; | |
| cells_preset[64*23:64*23+63] <= 64'b0000000000000000000110001100011000000000000000000000000000000000; | |
| cells_preset[64*24:64*24+63] <= 64'b0000000000000000000000010100000000000000000000000000000000000000; | |
| cells_preset[64*25:64*25+63] <= 64'b0000000000000000000000011000000000000000000000000000000000000000; | |
| cells_preset[64*26:64*26+63] <= 64'b0000000000000000000110000000011000000000000000000000000000000000; | |
| cells_preset[64*27:64*27+63] <= 64'b0000000000000000010100000000001010000000000000000000000000000000; | |
| cells_preset[64*28:64*28+63] <= 64'b0000000000000000101100000000001101000000000000000000000000000000; | |
| cells_preset[64*29:64*29+63] <= 64'b0000000000000000100000010010000001000000000000000000000000000000; | |
| cells_preset[64*30:64*30+63] <= 64'b0000000000000000011001110011100110000000000000000000000000000000; | |
| cells_preset[64*31:64*31+63] <= 64'b0000000000000000000101000000101000000000000000000000000000000000; | |
| cells_preset[64*32:64*32+63] <= 64'b0000000000000000000100100001001000000000000000000000000000000000; | |
| cells_preset[64*33:64*33+63] <= 64'b0000000000000000000011000000110000000000000000000000000000000000; | |
| cells_preset[64*34:64*34+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*35:64*35+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*36:64*36+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*37:64*37+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*38:64*38+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*39:64*39+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*40:64*40+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*41:64*41+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*42:64*42+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*43:64*43+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*44:64*44+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*45:64*45+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*46:64*46+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*47:64*47+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| preset_state <= 4; | |
| end else if (preset_state == 4) begin | |
| cells_preset[0 :64*0+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*1 :64*1+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*2 :64*2+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*3 :64*3+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*4 :64*4+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*5 :64*5+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*6 :64*6+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*7 :64*7+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*8 :64*8+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*9 :64*9+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*10:64*10+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*11:64*11+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*12:64*12+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*13:64*13+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*14:64*14+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*15:64*15+63] <= 64'b0000000000000000000000100000000000000000000000000000000000000000; | |
| cells_preset[64*16:64*16+63] <= 64'b0000000000000000000001110000000000000000000000000000000000000000; | |
| cells_preset[64*17:64*17+63] <= 64'b0000000000000000000011010000010000000000000000000000000000000000; | |
| cells_preset[64*18:64*18+63] <= 64'b0000000000000000000011100000111000000000000000000000000000000000; | |
| cells_preset[64*19:64*19+63] <= 64'b0000000000000000000001100001001100011100000000000000000000000000; | |
| cells_preset[64*20:64*20+63] <= 64'b0000000000000000000000000001110000100100000000000000000000000000; | |
| cells_preset[64*21:64*21+63] <= 64'b0000000000000000000000000000000000000100000000000000000000000000; | |
| cells_preset[64*22:64*22+63] <= 64'b0000000000000000000000000000000000000100000000000000000000000000; | |
| cells_preset[64*23:64*23+63] <= 64'b0000000000000000000000000000000000001000000000000000000000000000; | |
| cells_preset[64*24:64*24+63] <= 64'b0000000000000000000001110000000000000000000000000000000000000000; | |
| cells_preset[64*25:64*25+63] <= 64'b0000000000000000000001001000000000000000000000000000000000000000; | |
| cells_preset[64*26:64*26+63] <= 64'b0000000000000000000001000000000000000000000000000000000000000000; | |
| cells_preset[64*27:64*27+63] <= 64'b0000000000000000000001000000000000000000000000000000000000000000; | |
| cells_preset[64*28:64*28+63] <= 64'b0000000000000000000000100000000000000000000000000000000000000000; | |
| cells_preset[64*29:64*29+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*30:64*30+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*31:64*31+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*32:64*32+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*33:64*33+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*34:64*34+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*35:64*35+63] <= 64'b0000000000000000000111000000000000000000000000000000000000000000; | |
| cells_preset[64*36:64*36+63] <= 64'b0000000000000000000100100000000000010000000000000000000000000000; | |
| cells_preset[64*37:64*37+63] <= 64'b0000000000000000000100000000000000111000000000000000000000000000; | |
| cells_preset[64*38:64*38+63] <= 64'b0000000000000000000100000000000001101000000000000000000000000000; | |
| cells_preset[64*39:64*39+63] <= 64'b0000000000000000000100000000000001110000000000000000000000000000; | |
| cells_preset[64*40:64*40+63] <= 64'b0000000000000000000010000000000000110000000000000000000000000000; | |
| cells_preset[64*41:64*41+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*42:64*42+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*43:64*43+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*44:64*44+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*45:64*45+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*46:64*46+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*47:64*47+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| preset_state <= 5; | |
| end else if (preset_state == 5) begin | |
| cells_preset[0 :64*0+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*1 :64*1+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*2 :64*2+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*3 :64*3+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*4 :64*4+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*5 :64*5+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*6 :64*6+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*7 :64*7+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*8 :64*8+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*9 :64*9+63 ] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*10:64*10+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*11:64*11+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*12:64*12+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*13:64*13+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*14:64*14+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*15:64*15+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*16:64*16+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*17:64*17+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*18:64*18+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*19:64*19+63] <= 64'b0000000000110001100011000110001100011000110001100000000000000000; | |
| cells_preset[64*20:64*20+63] <= 64'b0000000000001100011000110001100011000110001100011000000000000000; | |
| cells_preset[64*21:64*21+63] <= 64'b0000000000001100011000110001100011000110001100011000000000000000; | |
| cells_preset[64*22:64*22+63] <= 64'b0000000000110001100011000110001100011000110001100000000000000000; | |
| cells_preset[64*23:64*23+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*24:64*24+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*25:64*25+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*26:64*26+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*27:64*27+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*28:64*28+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*29:64*29+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*30:64*30+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*31:64*31+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*32:64*32+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*33:64*33+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*34:64*34+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*35:64*35+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*36:64*36+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*37:64*37+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*38:64*38+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*39:64*39+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*40:64*40+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*41:64*41+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*42:64*42+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*43:64*43+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*44:64*44+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*45:64*45+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*46:64*46+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| cells_preset[64*47:64*47+63] <= 64'b0000000000000000000000000000000000000000000000000000000000000000; | |
| preset_state <= 1; | |
| end | |
| end | |
| // The value of cells_reset_state is the same as the current value of cells_preset | |
| assign cells_reset_state = cells_preset; | |
| // Create a clock to control the speed of generations | |
| wire Clk; | |
| clock(Clk, CLOCK_50); | |
| /** | |
| * Assign neighbours for each cell depending on the cell's location. | |
| * Cells on the edges and corners of the grid must be dealt with separately since | |
| * their neighbours are not directly adjacent. | |
| */ | |
| genvar i; | |
| generate | |
| for (i = 0; i < 64 * 48; i = i + 1) begin : CELLS | |
| wire [7:0] neighbours; | |
| if (i == 0) begin | |
| // Top-left square | |
| assign neighbours[0] = cells[64*48 - 1]; | |
| assign neighbours[1] = cells[64*48 - 64]; | |
| assign neighbours[2] = cells[64*48 - 64 + 1]; | |
| assign neighbours[3] = cells[i + 64 - 1]; | |
| assign neighbours[4] = cells[i + 1]; | |
| assign neighbours[5] = cells[64 + 64 - 1]; | |
| assign neighbours[6] = cells[64]; | |
| assign neighbours[7] = cells[64 + 1]; | |
| end else if (i == 63) begin | |
| // Top-right square | |
| assign neighbours[0] = cells[64*48 - 1 - 1]; | |
| assign neighbours[1] = cells[64*48 - 1]; | |
| assign neighbours[2] = cells[64*48 - 64]; | |
| assign neighbours[3] = cells[i - 1]; | |
| assign neighbours[4] = cells[0]; | |
| assign neighbours[5] = cells[i + 64 - 1]; | |
| assign neighbours[6] = cells[i + 64]; | |
| assign neighbours[7] = cells[i + 1]; | |
| end else if (i == 64*48 - 64) begin | |
| // Bottom-left square | |
| assign neighbours[0] = cells[i - 1]; | |
| assign neighbours[1] = cells[i - 64]; | |
| assign neighbours[2] = cells[i - 64 + 1]; | |
| assign neighbours[3] = cells[i + 64 - 1]; | |
| assign neighbours[4] = cells[i + 1]; | |
| assign neighbours[5] = cells[0 + 64 - 1]; | |
| assign neighbours[6] = cells[0]; | |
| assign neighbours[7] = cells[0 + 1]; | |
| end else if (i == 64*48 - 1) begin | |
| // Bottom-right square | |
| assign neighbours[0] = cells[i - 64 - 1]; | |
| assign neighbours[1] = cells[i - 64]; | |
| assign neighbours[2] = cells[i - 64 - 64 + 1]; | |
| assign neighbours[3] = cells[i - 1]; | |
| assign neighbours[4] = cells[i - 64 + 1]; | |
| assign neighbours[5] = cells[0 + 64 - 1 - 1]; | |
| assign neighbours[6] = cells[0 + 64 - 1]; | |
| assign neighbours[7] = cells[0]; | |
| end else if (i < 63) begin | |
| // Top row | |
| assign neighbours[0] = cells[64*48 - 64 + i - 1]; | |
| assign neighbours[1] = cells[64*48 - 64 + i]; | |
| assign neighbours[2] = cells[64*48 - 64 + i + 1]; | |
| assign neighbours[3] = cells[i - 1]; | |
| assign neighbours[4] = cells[i + 1]; | |
| assign neighbours[5] = cells[i + 64 - 1]; | |
| assign neighbours[6] = cells[i + 64]; | |
| assign neighbours[7] = cells[i + 64 + 1]; | |
| end else if (i > 64*48 - 64) begin | |
| // Bottom row | |
| assign neighbours[0] = cells[i - 64 - 1]; | |
| assign neighbours[1] = cells[i - 64]; | |
| assign neighbours[2] = cells[i - 64 + 1]; | |
| assign neighbours[3] = cells[i - 1]; | |
| assign neighbours[4] = cells[i + 1]; | |
| assign neighbours[5] = cells[0 + i - 1]; | |
| assign neighbours[6] = cells[0 + i]; | |
| assign neighbours[7] = cells[0 + i + 1]; | |
| end else if (i % 64 == 0) begin | |
| // Leftmost column | |
| assign neighbours[0] = cells[i - 1]; | |
| assign neighbours[1] = cells[i - 64]; | |
| assign neighbours[2] = cells[i - 64 + 1]; | |
| assign neighbours[3] = cells[i + 64 - 1]; | |
| assign neighbours[4] = cells[i + 1]; | |
| assign neighbours[5] = cells[i + 64 + 64 - 1]; | |
| assign neighbours[6] = cells[i + 64]; | |
| assign neighbours[7] = cells[i + 64 + 1]; | |
| end else if ((i + 1) % 64 == 0) begin | |
| // Rightmost column | |
| assign neighbours[0] = cells[i - 64 - 1]; | |
| assign neighbours[1] = cells[i - 64]; | |
| assign neighbours[2] = cells[i - 64 - 64 + 1]; | |
| assign neighbours[3] = cells[i - 1]; | |
| assign neighbours[4] = cells[i - 64 + 1]; | |
| assign neighbours[5] = cells[i + 64 - 1]; | |
| assign neighbours[6] = cells[i + 64]; | |
| assign neighbours[7] = cells[i + 1]; | |
| end else begin | |
| // Middle squares | |
| assign neighbours[0] = cells[i - 64 - 1]; | |
| assign neighbours[1] = cells[i - 64]; | |
| assign neighbours[2] = cells[i - 64 + 1]; | |
| assign neighbours[3] = cells[i - 1]; | |
| assign neighbours[4] = cells[i + 1]; | |
| assign neighbours[5] = cells[i + 64 - 1]; | |
| assign neighbours[6] = cells[i + 64]; | |
| assign neighbours[7] = cells[i + 64 + 1]; | |
| end | |
| // Create the module for the cell | |
| life_cell(neighbours, Clk, KEY[2], cells_reset_state[i], cells[i]); | |
| end | |
| endgenerate | |
| // Show the cells on the VGA display | |
| display(cells, x, y, r, g, b); | |
| endmodule | |
| /** | |
| * Uses CLOCK_50 to slow down Clk to 2 Hz | |
| */ | |
| module clock(Clk, Clk_50); | |
| input Clk_50; | |
| output Clk; | |
| reg [31:0] counter; | |
| always @(posedge Clk_50) begin | |
| if (counter == 25000000) | |
| counter <= 0; | |
| else | |
| counter <= counter + 1; | |
| end | |
| assign Clk = (counter == 25000000); | |
| endmodule | |
| /** | |
| * Create a Conway's Game of Life cell with the specified | |
| * neighbours, clock, reset, initial state, and current state | |
| */ | |
| module life_cell(neighbours, Clk, Rst, initial_state, state); | |
| input [7:0] neighbours; | |
| input Clk; | |
| input Rst; | |
| input initial_state; | |
| output reg state; | |
| wire [3:0] population; | |
| wire next_state; | |
| // population is the count of neighbouring cells that are alive (i.e. on) | |
| assign population = neighbours[7] + | |
| neighbours[6] + | |
| neighbours[5] + | |
| neighbours[4] + | |
| neighbours[3] + | |
| neighbours[2] + | |
| neighbours[1] + | |
| neighbours[0]; | |
| // next_state is the next state (alive or dead) of this cell | |
| assign next_state = (population == 2 & state) | population == 3; | |
| always @(posedge Clk or negedge Rst) begin | |
| if (!Rst) begin | |
| // When reset fires, return this cell to its initial state | |
| state = initial_state; | |
| end else begin | |
| // When the clock fires, bring this cell to its next state | |
| state = next_state; | |
| end | |
| end | |
| endmodule | |
| /** | |
| * Display the grid of cells on the VGA display. | |
| */ | |
| module display(cells, x, y, r, g, b); | |
| input [0:64*48-1] cells; | |
| input [9:0] x, y; | |
| output [9:0] r, g, b; | |
| // x and y change at a fast rate; | |
| // the colour of the pixel at the current (x, y) coordinates is determined by RGB | |
| reg [29:0] RGB; | |
| always @(x or y) begin | |
| // row = y / 10 | |
| // column = x / 10 | |
| // cell = (row * 64) + column | |
| // Find the cell index using `(y / 10) * 64 + (x / 10)`. See pseudocode above. | |
| if (cells[(y / 10) * 64 + (x / 10)]) begin | |
| // The cell that covers this (x, y) coordinate is alive, so turn on the pixel on | |
| RGB = 30'b111111111111111111111111111111; | |
| end else begin | |
| // The cell that covers this (x, y) coordinate is dead, so turn on the pixel off | |
| RGB = 30'b000000000000000000000000000000; | |
| end | |
| end | |
| assign r = RGB[29:20]; | |
| assign g = RGB[19:10]; | |
| assign b = RGB[9:0]; | |
| endmodule |
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Hey,
Hope you are doing well.
I was trying to recreate this code and found a little bug in it. For the neighbors of bottom row, neighbor 5,6 and 7 are incorrect. 5 and 7 are actually same as 3 and 4 in your code. I think the correct way for them is to use:
cells[0 + ( i % 64 ) +- 1].
Please correct me if I am wrong.
Anyway, thanks for keeping the code open source.
Regards.