From: Jan Michel <michel@physik.uni-frankfurt.de>
Date: Thu, 20 Jul 2023 13:42:59 +0000 (+0200)
Subject: add signal in advance of reboot to e.g. switch of Serdes / SFP
X-Git-Url: https://jspc29.x-matter.uni-frankfurt.de/git/?a=commitdiff_plain;h=12ba035861e1e05c3b6c072124d2dd0307fa38fe;p=trbnet.git

add signal in advance of reboot to e.g. switch of Serdes / SFP
---

diff --git a/special/fpga_reboot.vhd b/special/fpga_reboot.vhd
index a1e22ec..ffa7d79 100644
--- a/special/fpga_reboot.vhd
+++ b/special/fpga_reboot.vhd
@@ -9,6 +9,7 @@ entity fpga_reboot is
     RESET     : in std_logic;
     DO_REBOOT : in std_logic;
     REBOOT_ON_RESET : in std_logic := '0';
+    PREPARE_FOR_RELOAD : out std_logic;
     PROGRAMN  : out std_logic := '1'
     );
 end entity;
@@ -29,10 +30,14 @@ PROC_REBOOT : process
       restart_fpga_counter   <= x"000";
     else
       delayed_restart_fpga     <= '0';
+      PREPARE_FOR_RELOAD       <= '0';
       if DO_REBOOT = '1' then
         restart_fpga_counter   <= x"001";
       elsif restart_fpga_counter /= x"000" then
         restart_fpga_counter   <= restart_fpga_counter + 1;
+        if restart_fpga_counter >= x"800" then
+          PREPARE_FOR_RELOAD <= '1';
+        end if;
         if restart_fpga_counter >= x"F00" then
           delayed_restart_fpga <= '1';
         end if;
diff --git a/special/spi_flash_and_fpga_reload_record.vhd b/special/spi_flash_and_fpga_reload_record.vhd
index 6cc586a..d66527e 100644
--- a/special/spi_flash_and_fpga_reload_record.vhd
+++ b/special/spi_flash_and_fpga_reload_record.vhd
@@ -18,8 +18,9 @@ entity spi_flash_and_fpga_reload_record is
 
     DO_REBOOT_IN    : in  std_logic;
     REBOOT_ON_RESET : in std_logic := '0';
-    PROGRAMN        : out std_logic;
-    
+    PROGRAMN           : out std_logic;
+    PREPARE_FOR_RELOAD : out std_logic;
+
     SPI_CS_OUT     : out std_logic;
     SPI_SCK_OUT    : out std_logic;
     SPI_SDO_OUT    : out std_logic;
@@ -162,6 +163,7 @@ THE_FPGA_REBOOT : entity work.fpga_reboot
     RESET     => RESET_IN,
     DO_REBOOT => DO_REBOOT_IN,
     REBOOT_ON_RESET => REBOOT_ON_RESET,
+    PREPARE_FOR_RELOAD => PREPARE_FOR_RELOAD,
     PROGRAMN  => PROGRAMN
     );