From 9714818b1f67baf176c096e830e588c36c4222e0 Mon Sep 17 00:00:00 2001
From: feelfree69 <github@bkwn.de>
Date: Sun, 3 May 2026 15:55:36 +0200
Subject: [PATCH] Erase flash before writing upload image

---
 httpd/httpd.c   | 4 ++++
 rtl837x_flash.h | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/httpd/httpd.c b/httpd/httpd.c
index 38f2ec1..f04261b 100644
--- a/httpd/httpd.c
+++ b/httpd/httpd.c
@@ -332,6 +332,10 @@ uint8_t stream_upload(uint16_t bptr)
 			if (write_len >= FLASHMEM_PAGE_SIZE) {
 				dbg_string("len: "); dbg_short(write_len); dbg_char(' ');
 				dbg_string("CRC16: "); dbg_short(crc_value); dbg_char('\n');
+				if (uptr % FLASH_SECTOR_SIZE == 0) {
+					flash_region.addr = uptr;
+					flash_sector_erase();
+				}
 				flash_region.addr = uptr;
 				flash_region.len = FLASHMEM_PAGE_SIZE;
 				flash_write_bytes(flash_buf);
diff --git a/rtl837x_flash.h b/rtl837x_flash.h
index 60de64f..ec8bac8 100644
--- a/rtl837x_flash.h
+++ b/rtl837x_flash.h
@@ -1,6 +1,8 @@
 #ifndef _RTL837X_FLASH_H_
 #define _RTL837X_FLASH_H_
 
+#define FLASH_SECTOR_SIZE 0x1000
+
 void flash_init(uint8_t enable_dio);
 void flash_read_uid(void);
 void flash_write_enable(void);