From c8017017835e2265997a137bb44708791be0f085 Mon Sep 17 00:00:00 2001
From: cbb <2625274797@qq.com>
Date: Mon, 1 Jun 2026 21:27:03 +0800
Subject: [PATCH] =?UTF-8?q?fix(OTA):=20=E7=A7=BB=E9=99=A4BOM=E6=A0=87?=
 =?UTF-8?q?=E8=AE=B0=E5=B9=B6=E4=BC=98=E5=8C=96OTA=E5=A4=84=E7=90=86?=
 =?UTF-8?q?=E9=80=BB=E8=BE=91?=
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移除了OTA.cpp文件中的BOM标记，删除了调试打印代码，修复了
缓冲区溢出检查逻辑，并简化了结束确认帧的发送方式。

- 移除文件开头的BOM标记
- 删除DEBUG_PRINT相关的调试输出代码
- 修正缓冲区大小检查条件，使用expected_size替代硬编码值
- 将结束确认改为使用结构化ACK消息发送
---
 GD32E50X_BOOT/sys/OTA.cpp | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/GD32E50X_BOOT/sys/OTA.cpp b/GD32E50X_BOOT/sys/OTA.cpp
index 080ade4..6d4e879 100644
--- a/GD32E50X_BOOT/sys/OTA.cpp
+++ b/GD32E50X_BOOT/sys/OTA.cpp
@@ -1,4 +1,4 @@
-#include "OTA.h"
+#include "OTA.h"
 #include "Can.h"
 #include "SpiOta.h"
 #include "aes128.h"
@@ -297,10 +297,6 @@ void OTAHandler::process() {
     drainFlashBuffer();
     if (pending_finish_ack && flash_buf_cnt == 0U) {
         pending_finish_ack = false;
-#if DEBUG_PRINT
-        printf("[OTA] flash drain done, send FINISH ACK\r\n");
-#endif
-        send_structured_ack(0xFFFFFFFFU);
     }
 
     if (pending_app_jump) {
@@ -625,7 +621,7 @@ void OTAHandler::handleLinkMessage(ota_link_msg_type_t type, u8 *data, u8 len) {
                 return;
             } else {
                 u32 offset = receive_packet_num * OTA_PACKET_SIZE;
-                if (offset + OTA_PACKET_SIZE > APP_MAX_SIZE) {
+                if (offset >= expected_size) {
                     ota_error = OTA_ERROR_INVALID_SIZE;
                     ota_state = OTA_STATE_IDLE;
                     send_error_frame(receive_packet_num, OTA_ERROR_INVALID_SIZE);
@@ -652,8 +648,7 @@ void OTAHandler::handleLinkMessage(ota_link_msg_type_t type, u8 *data, u8 len) {
             if (receive_IFEND == 0xFFFFFFFFU) {
                 ota_state = OTA_STATE_FINISHED;
                 pending_finish_ack = true;
-                u8 wait_hint[1] = {0x04};
-                send_wait_frame(1, wait_hint);
+                send_structured_ack(0xF0F0F0F0U);
                 return;
             }