Initial commit

2021-02-28 18:59:56 +03:00
parent ff795d2b6e
commit 2fbacc0544
61 changed files with 6063 additions and 0 deletions
--- a/source/ice40_spram.sv
+++ b/source/ice40_spram.sv
@@ -0,0 +1,94 @@
+`timescale 1ns/100ps
+`default_nettype none
+
+module ice40_spram
+  (input wire clock,
+   input wire [15:0] addr,
+   input wire [15:0] data_i,
+   output wire [15:0] data_o,
+   input wire wr);
+
+    logic [15:0] data0_o;
+    logic [15:0] data1_o;
+    logic [15:0] data2_o;
+    logic [15:0] data3_o;
+    logic w0, w1, w2, w3;
+
+    logic [15:0] datax_o;
+    assign data_o = datax_o;
+
+    always @(*) begin
+        {w0, w1, w2, w3} = '0;
+
+        case (addr[15:14])
+          2'd0: begin
+              datax_o = data0_o;
+              w0 = wr;
+          end
+
+          2'd1: begin
+              datax_o = data1_o;
+              w1 = wr;
+          end
+
+          2'd2: begin
+              datax_o = data2_o;
+              w2 = wr;
+          end
+
+          2'd3: begin
+              datax_o = data3_o;
+              w3 = wr;
+          end
+        endcase
+    end
+
+    SB_SPRAM256KA spram0
+      (.CLOCK(clock),
+       .ADDRESS(addr[13:0]),
+       .DATAIN(data_i),
+       .DATAOUT(data0_o),
+       .WREN(w0),
+       .MASKWREN({w0, w0, w0, w0}),
+       .CHIPSELECT(1'b1),
+       .STANDBY(1'b0),
+       .SLEEP(1'b0),
+       .POWEROFF(1'b1));
+
+    SB_SPRAM256KA spram1
+      (.CLOCK(clock),
+       .ADDRESS(addr[13:0]),
+       .DATAIN(data_i),
+       .DATAOUT(data1_o),
+       .WREN(w1),
+       .MASKWREN({w1, w1, w1, w1}),
+       .CHIPSELECT(1'b1),
+       .STANDBY(1'b0),
+       .SLEEP(1'b0),
+       .POWEROFF(1'b1));
+
+    SB_SPRAM256KA spram2
+      (.CLOCK(clock),
+       .ADDRESS(addr[13:0]),
+       .DATAIN(data_i),
+       .DATAOUT(data2_o),
+       .WREN(w2),
+       .MASKWREN({w2, w2, w2, w2}),
+       .CHIPSELECT(1'b1),
+       .STANDBY(1'b0),
+       .SLEEP(1'b0),
+       .POWEROFF(1'b1));
+
+    SB_SPRAM256KA spram3
+      (.CLOCK(clock),
+       .ADDRESS(addr[13:0]),
+       .DATAIN(data_i),
+       .DATAOUT(data3_o),
+       .WREN(w3),
+       .MASKWREN({w3, w3, w3, w3}),
+       .CHIPSELECT(1'b1),
+       .STANDBY(1'b0),
+       .SLEEP(1'b0),
+       .POWEROFF(1'b1));
+
+endmodule // ice40_spram