From c67f3b574a920b15c877a969e8af725143d1ba6c Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Wed, 21 Feb 2024 10:59:49 +1100
Subject: [PATCH] AP_BoardConfig: added BRD_SD_FENCE

allow for fence storage on microSD
---
 libraries/AP_BoardConfig/AP_BoardConfig.cpp | 8 ++++++++
 libraries/AP_BoardConfig/AP_BoardConfig.h   | 6 ++++++
 2 files changed, 14 insertions(+)

diff --git a/libraries/AP_BoardConfig/AP_BoardConfig.cpp b/libraries/AP_BoardConfig/AP_BoardConfig.cpp
index 7367d34306..1457d86b62 100644
--- a/libraries/AP_BoardConfig/AP_BoardConfig.cpp
+++ b/libraries/AP_BoardConfig/AP_BoardConfig.cpp
@@ -354,6 +354,14 @@ const AP_Param::GroupInfo AP_BoardConfig::var_info[] = {
     // @RebootRequired: True
     // @User: Advanced
     AP_GROUPINFO("SD_MISSION", 24, AP_BoardConfig, sdcard_storage.mission_kb, 0),
+
+    // @Param: SD_FENCE
+    // @DisplayName:  SDCard Fence size
+    // @Description: This sets the amount of storage in kilobytes reserved on the microsd card in fence.stg for fence storage.
+    // @Range: 0 64
+    // @RebootRequired: True
+    // @User: Advanced
+    AP_GROUPINFO("SD_FENCE", 29, AP_BoardConfig, sdcard_storage.fence_kb, 0),
 #endif
 
     // index 25 used by SER5_RTSCTS
diff --git a/libraries/AP_BoardConfig/AP_BoardConfig.h b/libraries/AP_BoardConfig/AP_BoardConfig.h
index 47bf754da4..938180a238 100644
--- a/libraries/AP_BoardConfig/AP_BoardConfig.h
+++ b/libraries/AP_BoardConfig/AP_BoardConfig.h
@@ -221,6 +221,11 @@ public:
     static uint16_t get_sdcard_mission_kb(void) {
         return _singleton? _singleton->sdcard_storage.mission_kb.get() : 0;
     }
+
+    // return number of kb of fence storage to use on microSD
+    static uint16_t get_sdcard_fence_kb(void) {
+        return _singleton? _singleton->sdcard_storage.fence_kb.get() : 0;
+    }
 #endif
 
 private:
@@ -244,6 +249,7 @@ private:
 #if AP_SDCARD_STORAGE_ENABLED
     struct {
         AP_Int16 mission_kb;
+        AP_Int16 fence_kb;
     } sdcard_storage;
 #endif