Now works on iCEstick

[yule.git] / flash.v

diff --git a/flash.v b/flash.v
index 633cf6a8e8ab7fecddb16f817874b9b4aad47025..7168053859171bb48a3cd95a13f7f1dca7268fba 100644 (file)
--- a/flash.v
+++ b/flash.v
@@ -1,96 +1,16 @@
 `include "processor_4.v"
 
-module top (input CLK, output [7:0] OUT_C, output [2:0] OUT_R, output [3:0] IN_C, input [3:0] IN_R, output [3:0] IND, output UART_TX, input UART_RX);
-
-    wire [23:0] led;
-   
-    // Prescaler on the clock
-   
-    reg [24:0] counter = 0;
-
-    always @ (posedge CLK) begin
-      
-        counter <= counter + 1;
-   
-    end
-   
-    // Handle the inputs
-
-    reg [3:0] shift_in = 4'b1110;
-
-    always @ (negedge counter[13]) begin
-
-        shift_in <= { shift_in[2:0], shift_in[3] };
-      
-    end
-
-    assign IN_C = shift_in;
-
-    reg [15:0] buttons = 0;
-
-    always @ (posedge counter[13]) begin
-
-        case (shift_in)
-            4'b1110: begin
-                buttons[0] <= !IN_R[0];
-                buttons[4] <= !IN_R[1];
-                buttons[8] <= !IN_R[2];
-                buttons[12] <= !IN_R[3];    
-            end
-            4'b1101: begin
-                buttons[1] <= !IN_R[0];
-                buttons[5] <= !IN_R[1];
-                buttons[9] <= !IN_R[2];
-                buttons[13] <= !IN_R[3];      
-            end
-            4'b1011: begin
-                buttons[2] <= !IN_R[0];
-                buttons[6] <= !IN_R[1];
-                buttons[10] <= !IN_R[2];
-                buttons[14] <= !IN_R[3];
-            end
-            4'b0111: begin
-                buttons[3] <= !IN_R[0];
-                buttons[7] <= !IN_R[1];
-                buttons[11] <= !IN_R[2];
-                buttons[15] <= !IN_R[3];      
-            end
-        endcase
-
-    end
-
-    // Connect up the processor
-
-   PROCESSOR cpu(.clk(CLK),//counter[20]),
-                                .led(led),
-                                .indicators(IND),
-                                .uart_tx(UART_TX),
-                                .uart_rx(UART_RX),
-                                .buttons(buttons));
-
-    // Handle output stuff
-   
-    reg [7:0] out;
-
-    reg [2:0] shift_out = 3'b001;
-
-    always @ (posedge counter[7]) begin
-
-        if (shift_out[2] == 1)
-            out <= led[7:0];
-        if (shift_out[0] == 1)
-            out <= led[15:8];
-        if (shift_out[1] == 1)
-            out <= led[23:16];
-
-        shift_out <= { shift_out[1:0], shift_out[2] };
+module top (input CLK, output [4:0] LED, output UART_TX, input UART_RX);
+   // Prescaler on the clock
+   reg [24:0]  counter = 0;
 
+   always @ (posedge CLK) begin
+      counter <= counter + 1;
    end
 
-   assign OUT_R = shift_out;
-   
-   assign OUT_C = out;
-
-endmodule 
-
-
+   // Connect up the processor
+   PROCESSOR cpu(.clk(counter[10]),
+                                .led(LED),
+                                .uart_tx(UART_TX),
+                                .uart_rx(UART_RX));
+endmodule