From 17a485dce3739befcc2f6b3ab64adb85ef9d432f Mon Sep 17 00:00:00 2001
From: dam1n19 <dam1n19@soton.ac.uk>
Date: Wed, 3 May 2023 15:55:13 +0100
Subject: [PATCH] SOC1-167: Added default slave in case of no expansion region
 define

---
 system/src/verilog/nanosoc_chip.v | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/system/src/verilog/nanosoc_chip.v b/system/src/verilog/nanosoc_chip.v
index 52f2a91..58972ff 100644
--- a/system/src/verilog/nanosoc_chip.v
+++ b/system/src/verilog/nanosoc_chip.v
@@ -863,6 +863,19 @@ nanosoc_exp #(.ADDRWIDTH(29)
   .ip_data_req (exp_ip_req),
   .op_data_req (exp_op_req)
 );
+`else
+ // Default slave - if no expansion region
+ cmsdk_ahb_default_slave u_ahb_exp (
+   .HCLK         (HCLK),
+   .HRESETn      (HRESETn),
+   .HSEL         (HSEL_exp),
+   .HTRANS       (HTRANS_exp),
+   .HREADY       (HREADYMUX_exp),
+   .HREADYOUT    (HREADYOUT_exp),
+   .HRESP        (HRESP_exp)
+);
+ assign   HRDATA_exp = 32'heaedeaed; // Tie off Expansion Address Expansion Data
+ 
 `endif
 
 //   soclabs_ahb_aes128_ctrl u_exp_aes128 (
-- 
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