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Diffstat (limited to 'examples/igloo2/example.v')
| -rw-r--r-- | examples/igloo2/example.v | 64 |
1 files changed, 64 insertions, 0 deletions
diff --git a/examples/igloo2/example.v b/examples/igloo2/example.v new file mode 100644 index 000000000..4a9486e50 --- /dev/null +++ b/examples/igloo2/example.v @@ -0,0 +1,64 @@ +module example ( + input clk, + input SW1, + input SW2, + output LED1, + output LED2, + output LED3, + output LED4, + + output AA, AB, AC, AD, + output AE, AF, AG, CA +); + + localparam BITS = 8; + localparam LOG2DELAY = 22; + + reg [BITS+LOG2DELAY-1:0] counter = 0; + reg [BITS-1:0] outcnt; + + always @(posedge clk) begin + counter <= counter + SW1 + SW2 + 1; + outcnt <= counter >> LOG2DELAY; + end + + assign {LED1, LED2, LED3, LED4} = outcnt ^ (outcnt >> 1); + + // assign CA = counter[10]; + // seg7enc seg7encinst ( + // .seg({AA, AB, AC, AD, AE, AF, AG}), + // .dat(CA ? outcnt[3:0] : outcnt[7:4]) + // ); + + assign {AA, AB, AC, AD, AE, AF, AG} = ~(7'b 100_0000 >> outcnt[6:4]); + assign CA = outcnt[7]; +endmodule + +module seg7enc ( + input [3:0] dat, + output [6:0] seg +); + reg [6:0] seg_inv; + always @* begin + seg_inv = 0; + case (dat) + 4'h0: seg_inv = 7'b 0111111; + 4'h1: seg_inv = 7'b 0000110; + 4'h2: seg_inv = 7'b 1011011; + 4'h3: seg_inv = 7'b 1001111; + 4'h4: seg_inv = 7'b 1100110; + 4'h5: seg_inv = 7'b 1101101; + 4'h6: seg_inv = 7'b 1111101; + 4'h7: seg_inv = 7'b 0000111; + 4'h8: seg_inv = 7'b 1111111; + 4'h9: seg_inv = 7'b 1101111; + 4'hA: seg_inv = 7'b 1110111; + 4'hB: seg_inv = 7'b 1111100; + 4'hC: seg_inv = 7'b 0111001; + 4'hD: seg_inv = 7'b 1011110; + 4'hE: seg_inv = 7'b 1111001; + 4'hF: seg_inv = 7'b 1110001; + endcase + end + assign seg = ~seg_inv; +endmodule |