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[/] [csa/] [trunk/] [quartus10/] [ledseg_cnt.v] - Diff between revs 33 and 38
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| Rev 33 |
Rev 38 |
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Line 10... |
, input [15:0] data // the data want output at led segment
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, input [15:0] data // the data want output at led segment
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, output reg [ 3:0] seg // led segment scan signal
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, output reg [ 3:0] seg // led segment scan signal
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, output [ 7:0] segd // led segment output
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, output [ 7:0] segd // led segment output
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);
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);
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`define CNT_W 11 // count reg width
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`define CNT_W 15 // count reg width
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// interival variable
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// interival variable
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reg [`CNT_W-1:0] cnt;
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reg [`CNT_W-1:0] cnt;
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always @(posedge clk)
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always @(posedge clk)
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cnt<=cnt+11'h001; // up reg
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cnt<=cnt+`CNT_W'h1; // up reg
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reg h;
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reg [3:0] h;
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always @(cnt or data)
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always @(cnt or data)
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begin
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begin
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case (cnt[`CNT_W-1:`CNT_W-2])
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case (cnt[`CNT_W-1:`CNT_W-2])
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2'b00:h = data[15:12];
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2'b00:h <= data[15:12];
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2'b01:h = data[11: 8];
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2'b01:h <= data[11: 8];
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2'b10:h = data[7 : 4];
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2'b10:h <= data[ 7: 4];
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2'b11:h = data[3 : 0];
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2'b11:h <= data[ 3: 0];
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default:h = 4'hf;
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endcase
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endcase
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end
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end
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always @(cnt)
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always @(cnt)
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begin
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begin
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case (cnt[`CNT_W-1:`CNT_W-2])
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case (cnt[`CNT_W-1:`CNT_W-2])
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2'b00:seg = 4'b1110;
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2'b00:seg = 4'b1110;
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2'b01:seg = 4'b1101;
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2'b01:seg = 4'b1101;
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2'b10:seg = 4'b1011;
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2'b10:seg = 4'b1011;
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2'b11:seg = 4'b0111;
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2'b11:seg = 4'b0111;
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default:seg = 4'hf;
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endcase
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endcase
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end
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end
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hex2seg h2s(
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hex2seg h2s(
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.hex(h)
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.hex(h)
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