rtl: sampler ready

rtl/sampler/src/sampler.sv

@@ -0,0 +1,72 @@
+`timescale 1ns / 1ps
+
+
+
+module sampler
+#(
+    parameter DATA_WIDTH = 12,
+    parameter PACK_FACTOR = 3,
+    parameter PROCESS_MODE = 1
+    )
+(
+    input clk_in,
+    input rst,
+    input [DATA_WIDTH-1:0] data_in,
+    input out_of_range,
+
+    output logic [DATA_WIDTH*PACK_FACTOR-1:0]  m_axis_tdata,
+    output logic                              m_axis_tvalid
+    );
+    logic [DATA_WIDTH-1:0] data_converted;
+    logic out_of_range_reg;
+
+    always @( posedge clk_in) begin
+        if (rst) begin
+            data_converted <= '0;
+        end else begin
+            out_of_range_reg <= out_of_range;
+            if (PROCESS_MODE) begin
+                if (data_in == 12'b100000000000) begin
+                    data_converted <= data_in;
+                end else begin
+                    data_converted <= data_in[DATA_WIDTH-1]  ? {1'b1, (~data_in[DATA_WIDTH-2:0] + 1'b1)} : data_in; 
+                    
+                end
+            end else begin
+                data_converted <= data_in; 
+            end
+        end
+    end 
+    
+         
+    logic [DATA_WIDTH*PACK_FACTOR-1:0] buffer;
+    logic buffer_ready;
+
+    logic [$clog2(PACK_FACTOR):0] cnt;
+    
+    always @(posedge clk_in) begin
+        if (rst) begin
+            buffer <= '0;
+            cnt <= -1; //
+            buffer_ready <= 0;
+        end
+        else begin
+            buffer_ready <= 0;
+            if (!out_of_range_reg) begin
+                buffer <= {buffer[DATA_WIDTH*(PACK_FACTOR-1)-1:0], data_converted};
+                if (cnt == PACK_FACTOR-1) begin
+                    cnt <= 0;
+                    buffer_ready <= 1;
+                    buffer <= {buffer[DATA_WIDTH*(PACK_FACTOR-1)-1:0], data_converted};
+                end
+                else begin
+                    cnt <= cnt + 1;
+                end
+            end
+        end
+    end
+    
+    assign m_axis_tdata = buffer;
+    assign m_axis_tvalid = buffer_ready;
+    
+endmodule