Add files, and add a freezeswitch to debug this issue with push no type check.

[fpgaboy.git] / 7seg.v

diff --git a/7seg.v b/7seg.v
new file mode 100644 (file)
index 0000000..ed4519a
--- /dev/null
+++ b/7seg.v
@@ -0,0 +1,58 @@
+module AddrMon(
+       input [15:0] addr,
+       input clk,
+       output reg [3:0] digit,
+       output reg [7:0] out,
+       input freeze
+       );
+
+       reg [12:0] clkdv;
+       reg [1:0] dcount;
+       
+       reg [15:0] latch = 0;
+
+       wire [3:0] curval =
+               (dcount == 2'b00) ? latch[3:0]  :
+               (dcount == 2'b01) ? latch[7:4]  :
+               (dcount == 2'b10) ? latch[11:8] :
+                                    latch[15:12];
+
+       always @ (negedge clk)
+       begin
+               clkdv <= clkdv + 1;
+               if (~freeze)
+                       latch <= addr;
+       end
+
+       always @ (posedge clkdv[12])
+       begin
+               dcount <= dcount + 1;
+
+               case(dcount)
+               2'b00: digit <= 4'b1110;
+               2'b01: digit <= 4'b1101;
+               2'b10: digit <= 4'b1011;
+               2'b11: digit <= 4'b0111;
+               endcase
+
+               case(curval)
+                            /* ABCDEFGP */
+               4'h0: out <= ~8'b11111100;
+               4'h1: out <= ~8'b01100000;
+               4'h2: out <= ~8'b11011010;
+               4'h3: out <= ~8'b11110010;
+               4'h4: out <= ~8'b01100110;
+               4'h5: out <= ~8'b10110110;
+               4'h6: out <= ~8'b10111110;
+               4'h7: out <= ~8'b11100000;
+               4'h8: out <= ~8'b11111110;
+               4'h9: out <= ~8'b11110110;
+               4'hA: out <= ~8'b11101110;
+               4'hB: out <= ~8'b00111110;
+               4'hC: out <= ~8'b10011100;
+               4'hD: out <= ~8'b01111010;
+               4'hE: out <= ~8'b10011110;
+               4'hF: out <= ~8'b10001110;
+               endcase
+       end
+endmodule