From ff1faf971a87362f9e0664dcfcf6bb447b043aeb Mon Sep 17 00:00:00 2001
From: "Pavel V. Shatov (Meister)" <meisterpaul1@yandex.ru>
Date: Thu, 5 Jul 2018 21:40:51 +0300
Subject: Changed top module to accomodate changes to the clock manager.

---
 rtl/alpha_fmc_top.v | 46 ++++++++++++----------------------------------
 1 file changed, 12 insertions(+), 34 deletions(-)

diff --git a/rtl/alpha_fmc_top.v b/rtl/alpha_fmc_top.v
index 03c2802..1bc1ce2 100644
--- a/rtl/alpha_fmc_top.v
+++ b/rtl/alpha_fmc_top.v
@@ -8,7 +8,7 @@
 //
 //
 // Author: Pavel Shatov
-// Copyright (c) 2016, NORDUnet A/S All rights reserved.
+// Copyright (c) 2016, 2018 NORDUnet A/S All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions
@@ -67,46 +67,25 @@ module alpha_fmc_top
    //----------------------------------------------------------------
    // Clock Manager
    //
-   // Clock manager is used to generate SYS_CLK from GCLK
-   // and implement the reset logic.
+   // Clock manager is used to buffer FMC_CLK and implement reset logic.
    // ----------------------------------------------------------------
-   wire               sys_clk;
-   wire               sys_rst_n;
+   wire               sys_clk;		// system clock (90 MHz)
+   wire               sys_rst_n;	// active-low reset
 
-   alpha_clkmgr #
-     (
-      .CLK_OUT_MUL      (20.0),    // 2..64
-      .CLK_OUT_DIV      (20.0)     // 1..128
-      )
-   clkmgr
-     (
-      .gclk      (gclk_pin),
-      
-      .sys_clk   (sys_clk),
-      .sys_rst_n (sys_rst_n)
-      );
-
-
-   //----------------------------------------------------------------
-   // BUFG
-   //
-   // FMC clock must be routed through the global clocking backbone.
-   // ----------------------------------------------------------------
-   wire               fmc_clk_bug;
-
-   BUFG BUFG_fmc_clk
-     (
-      .I                (fmc_clk),
-      .O                (fmc_clk_bufg)
-      );
+	alpha_clkmgr clkmgr
+	(
+		.fmc_clk		(fmc_clk),
+	
+		.sys_clk		(sys_clk),
+		.sys_rst_n		(sys_rst_n)
+	);
 
 
 
    //----------------------------------------------------------------
    // FMC Arbiter
    //
-   // FMC arbiter handles FMC access and transfers it into
-   // `sys_clk' clock domain.
+   // FMC arbiter handles FMC accesses.
    //----------------------------------------------------------------
 
    wire [23: 0]       sys_fmc_addr;     // address
@@ -121,7 +100,6 @@ module alpha_fmc_top
       )
    fmc
      (
-      .fmc_clk(fmc_clk_bufg),
       .fmc_a(fmc_a),
       .fmc_d(fmc_d),
       .fmc_ne1(fmc_ne1),
-- 
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