From f029819af29e9c6cf4b1b9a360628c6d9030eac1 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Tue, 26 Nov 2024 09:26:11 +1100
Subject: [PATCH] replace bootloader version in payload

when the config client writes the eeprom area automatically replace
the version byte with the right version to avoid the extra flash
erase/write in update_EEPROM()
---
 bootloader/main.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/bootloader/main.c b/bootloader/main.c
index 17a0422..93656dd 100644
--- a/bootloader/main.c
+++ b/bootloader/main.c
@@ -428,6 +428,16 @@ static void decodeInput()
 	    return;
 	}
 
+  if (address == EEPROM_START_ADD && payload_buffer_size > 2) {
+      /*
+        if the configuration client is writing the eeprom area
+        then replace the bootloader version byte in the buffer
+        with the right version. This makes the update_EEPROM()
+        less likely to need to erase any flash
+      */
+      payLoadBuffer[2] = BOOTLOADER_VERSION;
+  }
+
 	if (!save_flash_nolib((uint8_t*)payLoadBuffer, payload_buffer_size,address)) {
 	    send_BAD_ACK();
 	} else {