From 2f4dd2660df552c33b345e1a1f4dfcc9e34836fd Mon Sep 17 00:00:00 2001
From: zouhaitao <zhongxuanzhen@xtell.cn>
Date: Wed, 29 Jul 2026 09:57:36 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20=E8=A7=A3=E9=94=81=E6=81=A2=E5=A4=8D=20S?=
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---
 App/event.c  | 2 +-
 App/system.c | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/App/event.c b/App/event.c
index bf12a6d..ba37f39 100644
--- a/App/event.c
+++ b/App/event.c
@@ -193,7 +193,7 @@ void Event_KeyScan_Poll(void)
     u8 raw_up      = !KEY_UP;
     u8 raw_down    = ADC_IsKeyDown(); // KEY_DOWN 通过 P0.3 ADC 通道判定 (常态 2.0V, 按下 3.7V)
     u8 raw_confirm = !KEY_CONFIRM;
-    u8 raw_sos     = 0; // 临时注释关闭 SOS 物理按键电平检测，防浮空干扰
+    u8 raw_sos     = !KEY_SOS; // 恢复 SOS 物理按键电平检测
     key_scan_timer = 0; // 重置扫描分频计数器
 
     // 按键调试诊断：若按键 ADC 值有变化或处于高电平，串口输出真实 ADC 值
diff --git a/App/system.c b/App/system.c
index 3578669..492e4ed 100644
--- a/App/system.c
+++ b/App/system.c
@@ -51,6 +51,12 @@ void GPIO_Init(void)
     MOTOR = 0;
     RGB_DIN = 0;    // P2.3 初始拉低，防止上电期间 WS2812B 误触发
 
+    // 配置 KEY_SOS (P2.6) 为带上拉准双向口模式以确保输入稳定
+    P2M1 &= ~(1 << 6);
+    P2M0 &= ~(1 << 6);
+    KEY_SOS = 1;
+    (*(unsigned char volatile xdata *)0xFE12) |= (1 << 6); // 使能 P2.6 的强内部上拉电阻 (P2PU = 0xFE12)
+
     // SGM_CTRL (P1.7), LCD 控制管脚 (P1.0, P1.1, P1.4, P1.5, P1.6) 置为推挽输出
     P1M1 &= ~((1 << 7) | (1 << 0) | (1 << 1) | (1 << 4) | (1 << 5) | (1 << 6));
     P1M0 |= ((1 << 7) | (1 << 0) | (1 << 1) | (1 << 4) | (1 << 5) | (1 << 6));