From 29d4b3cced275c4304bec89d71e016c67a68165c Mon Sep 17 00:00:00 2001
From: Yunus Emre ERYILMAZ <30428379+yunuseryilmaz18@users.noreply.github.com>
Date: Thu, 20 Oct 2022 09:48:29 +0300
Subject: [PATCH] Update frac_mem_32k.v

1. Mixed use of non-blocking and blocking statements are unsynthesizable in Synopsys Design Compiler.
2. While defining a multidimensional array, the first array size is for the length and the second one is for the depth. The order for ram_a and ram_b arrays was wrong and it caused "out of bounds" error in DC.
---
 .../openfpga_cell_library/verilog/frac_mem_32k.v       | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/openfpga_flow/openfpga_cell_library/verilog/frac_mem_32k.v b/openfpga_flow/openfpga_cell_library/verilog/frac_mem_32k.v
index b99753e7f..22fb6bfc2 100644
--- a/openfpga_flow/openfpga_cell_library/verilog/frac_mem_32k.v
+++ b/openfpga_flow/openfpga_cell_library/verilog/frac_mem_32k.v
@@ -32,8 +32,8 @@ module frac_mem_32k (
   input clk,
   input [0:3] mode);
 
-  reg [0:9] ram_a [0:31];
-  reg [0:9] ram_b [0:31];
+  reg [0:31] ram_a [0:9];
+  reg [0:31] ram_b [0:9];
 
   always @(posedge clk) begin
     // Operating mode: single port RAM 512 x 64
@@ -153,7 +153,7 @@ module frac_mem_32k (
     // Operating mode: single port RAM 32768 x 1
     end else if (4'b0110 == mode) begin
       if (we_a) begin
-        ram_a[addr_a[0:9]][addr_a[10:14]] = data_a[0:0];
+        ram_a[addr_a[0:9]][addr_a[10:14]] <= data_a[0:0];
       end else begin
         q_a <= ram_a[addr_a[0:9]][addr_a[10:14]];
       end
@@ -361,12 +361,12 @@ module frac_mem_32k (
     // Operating mode: dual port RAM 32768 x 1
     end else if (4'b1101 == mode) begin
       if (we_a) begin
-        ram_a[addr_a[0:9]][addr_a[10:14]] = data_a[0:0];
+        ram_a[addr_a[0:9]][addr_a[10:14]] <= data_a[0:0];
       end else begin
         q_a <= ram_a[addr_a[0:9]][addr_a[10:14]];
       end
       if (we_b) begin
-        ram_b[addr_b[0:9]][addr_b[10:14]] = data_b[0:0];
+        ram_b[addr_b[0:9]][addr_b[10:14]] <= data_b[0:0];
       end else begin
         q_b <= ram_b[addr_b[0:9]][addr_b[10:14]];
       end