feat(power): low-battery tip screen and auto power-off below 6.2V

Stop all sound, show UI0902 LOWBAT_TIP fullscreen, then soft-off after 10s. Skip while charging; speed up ADC sampling near empty. Pack new tip bitmap into ExtFlash UI0902 map.

Co-authored-by: Cursor <cursoragent@cursor.com>

APP/app_adc.c

@@ -65,6 +65,18 @@ uint8_t  percentage = 0;
 //static uint32_t charge_step_tick = 0;
 #define VBAT_MIN_RAW   2520
 #define VBAT_MAX_RAW   3528
+/* 包电压标定：MIN≈6.0V(0%) … MAX≈8.4V(100%)；关机阈值 6.2V */
+#define VBAT_PACK_V_MIN_MV   6000
+#define VBAT_PACK_V_MAX_MV   8400
+#define VBAT_SHUTDOWN_MV     6200
+#define VBAT_SHUTDOWN_RAW \
+    (VBAT_MIN_RAW + (uint32_t)(VBAT_SHUTDOWN_MV - VBAT_PACK_V_MIN_MV) * \
+     (VBAT_MAX_RAW - VBAT_MIN_RAW) / (VBAT_PACK_V_MAX_MV - VBAT_PACK_V_MIN_MV))
+/* 接近关机阈值时加快采样（约 <6.5V） */
+#define VBAT_FAST_SAMPLE_RAW \
+    (VBAT_MIN_RAW + (uint32_t)(500) * (VBAT_MAX_RAW - VBAT_MIN_RAW) / \
+     (VBAT_PACK_V_MAX_MV - VBAT_PACK_V_MIN_MV))
+#define BAT_SAMPLE_INTERVAL_LOW_MS  2000
 
 
 
@@ -72,10 +84,14 @@ uint8_t  percentage = 0;
 
 static void app_adc_string_process(uint8_t channel)
 {
-
+    uint16_t adc_val;
-    uint16_t adc_val = ADC_ReadChannel(ADC_CHANNEL_0) >> 5;
     uint8_t vel_out = 80;
 
+    if (System_LowBat_IsActive())
+        return;
+
+    adc_val = ADC_ReadChannel(ADC_CHANNEL_0) >> 5;
+
     if (adc_val >= 127) {
         /* δ<><CEB4><EFBFBD><EFBFBD> <20><> Note Off */
         if (string_state[channel]) {
@@ -114,10 +130,16 @@ pick_state_t app_adc_get_pick_input(void)
 
 static void app_adc_pick_process(void)
 {
-    pick_state_t curstate = app_adc_get_pick_input();
+    pick_state_t curstate;
-    
+    uint32_t now;
-    uint32_t now = rt_tick_get();
     uint32_t hold_tick;
+
+    if (System_LowBat_IsActive())
+        return;
+
+    curstate = app_adc_get_pick_input();
+    
+    now = rt_tick_get();
     switch(pick_fsm)
     {
         case PICK_FSM_STATE_IDLE: 
@@ -368,7 +390,7 @@ static void app_adc_battery_do_sample(void)
     bat_index = (bat_index + 1) % BAT_SAMPLE_COUNT;
 }
 
-/* 上报：映射成百分比，变化才发消息 */
+/* 上报：映射成百分比，变化才发消息；低于 6.2V 触发低电量关机流程 */
 static void app_adc_battery_report(void)
 {
     uint16_t filtered = bat_sum / BAT_SAMPLE_COUNT;
@@ -382,6 +404,15 @@ static void app_adc_battery_report(void)
         pct = 100 * (filtered - VBAT_MIN_RAW) / (VBAT_MAX_RAW - VBAT_MIN_RAW);
     pct = (pct / 10) * 10;
 
+    /* 开机且未充电：包电压低于 6.2V → 立即停声并弹关机提示（只触发一次） */
+    if (powon && !usb_charging_state && !System_LowBat_IsActive() &&
+        filtered < (uint16_t)VBAT_SHUTDOWN_RAW)
+    {
+        LOG_W("BAT", "lowbat raw=%u thr=%u → tip+shutdown",
+              (unsigned)filtered, (unsigned)VBAT_SHUTDOWN_RAW);
+        MainTask_Sendmsg(MSG_ID_LOW_BAT_TIP, pct, filtered, 0);
+    }
+
     if (pct != percentage) {          /* 变化才上报 */
         percentage = pct;
         if(usb_charging_state && !powon)
@@ -404,14 +435,19 @@ static void app_adc_battery_process(void)
     switch (bat_state)
     {
     case BAT_IDLE:
-        /* 触发：开机后首采，或距上次 ≥30s */
+        /* 触发：开机后首采，或距上次 ≥30s（接近低电时改为 2s） */
         if (/*powon && */!bat_poweron_done)
         {
             bat_poweron_done = 1;
             bat_state = BAT_START;
         }
-        else if (now - bat_last_sample_tick >= BAT_SAMPLE_INTERVAL_MS)
+        else
         {
+            uint32_t interval = BAT_SAMPLE_INTERVAL_MS;
+            uint16_t last_avg = bat_sum / BAT_SAMPLE_COUNT;
+            if (last_avg != 0 && last_avg < (uint16_t)VBAT_FAST_SAMPLE_RAW)
+                interval = BAT_SAMPLE_INTERVAL_LOW_MS;
+            if (now - bat_last_sample_tick >= interval)
                 bat_state = BAT_START;
         }
         break;

Global/Global.c

@@ -184,6 +184,11 @@ static volatile uint8_t s_pwr_rails_cut = 0;
 /* TMR7：关机长按已触发请求后的紧急倒计时（ms） */
 static volatile uint16_t s_pwr_off_grace_ms = 0;
 
+/* 电量 <6.2V：提示界面停留后关机 */
+#define LOWBAT_SHUTDOWN_DELAY_MS  10000u
+static volatile uint8_t  s_lowbat_active = 0;
+static volatile uint32_t s_lowbat_deadline_ms = 0;
+
 /* ==================== 开机/关机动作 ==================== */
 
 /* 仅 GPIO/背光：可在 ISR / HardFault 中调用，禁止 RTOS/Flash/日志 */
@@ -214,6 +219,8 @@ void System_PowerOn(void)
   app_tm1629_reset_key_state();
   s_pwr_rails_cut = 0u;
   s_pwr_off_grace_ms = 0u;
+  s_lowbat_active = 0u;
+  s_lowbat_deadline_ms = 0u;
   /* 本次长按已用于开机：先消耗，再置 powon，防止 TMR7 ISR 把同一按压力即判为关机 */
   Power_Key_ConsumePress();
   /* 控制电源硬件；蓝牙按 NVM/系统设置开关恢复，勿强制常开 */
@@ -318,6 +325,36 @@ void System_PowerOff_Poll(void)
   }
 }
 
+/* 电量 <6.2V：提示界面停留后关机 */
+void System_LowBat_Arm(void)
+{
+  if (s_lowbat_active)
+    return;
+  s_lowbat_active = 1;
+  s_lowbat_deadline_ms = rt_tick_get() * 1000u / RT_TICK_PER_SECOND + LOWBAT_SHUTDOWN_DELAY_MS;
+  LOG_I("PWR", "lowbat tip armed, power_off in %ums", (unsigned)LOWBAT_SHUTDOWN_DELAY_MS);
+}
+
+uint8_t System_LowBat_IsActive(void)
+{
+  return s_lowbat_active;
+}
+
+void System_LowBat_Poll(void)
+{
+  uint32_t now;
+  if (!s_lowbat_active || !powon)
+    return;
+  now = rt_tick_get() * 1000u / RT_TICK_PER_SECOND;
+  if ((int32_t)(now - s_lowbat_deadline_ms) >= 0)
+  {
+    s_lowbat_active = 0;
+    LOG_I("PWR", "lowbat tip timeout → power_off");
+    System_RequestPowerOff();
+  }
+}
+
+
 /*
  * TMR7 1ms（优先级高于伴奏 TMR6）：与主循环解耦的关机键扫描。
  * 正常：请求优雅关机；超时未切轨 → 紧急断电并复位。

Global/Global.h

@@ -31,6 +31,7 @@
 #define MSG_ID_CHARG                27
 #define MSG_ID_BLE_UI_REFRESH       28
 #define MSG_ID_BLE_STYLE_SET        29
+#define MSG_ID_LOW_BAT_TIP          30
 
 #define GPIO_PIN_RESET   false
 #define GPIO_PIN_SET     true
@@ -177,6 +178,10 @@ void AutoPowerOff_Scan(void);
 void System_PowerOn(void);
 void System_RequestPowerOff(void);
 void System_PowerOff_Poll(void);
+/* 低电量：停声+提示后 10s 关机（主循环 Poll） */
+void System_LowBat_Arm(void);
+void System_LowBat_Poll(void);
+uint8_t System_LowBat_IsActive(void);
 extern uint8_t Led;
 extern bool PressFlag;
 

project/inc/UI0902_Res_Addr.h

@@ -288,7 +288,11 @@
 #define UI0902_FLASH_MODE_W     240
 #define UI0902_FLASH_MODE_H     320
 
-#define UI0902_BTN_CANCEL_BIG_ADDR  (UI0902_RES_BASE + 0x0F8000UL)  /* 11872 bytes */
+#define UI0902_LOWBAT_TIP_ADDR  (UI0902_RES_BASE + 0x0F8000UL)  /* 153600 bytes */
+#define UI0902_LOWBAT_TIP_W     240
+#define UI0902_LOWBAT_TIP_H     320
+
+#define UI0902_BTN_CANCEL_BIG_ADDR  (UI0902_RES_BASE + 0x11E000UL)  /* 11872 bytes */
 #define UI0902_BTN_CANCEL_BIG_W     106
 #define UI0902_BTN_CANCEL_BIG_H     56
 

project/src/main.c

@@ -108,6 +108,7 @@ int main(void)
     Power_Key_Scan();
     AutoPowerOff_Scan();
     System_PowerOff_Poll();
+    System_LowBat_Poll();
     LCD_Dump_Poll();
 #if !DEBUG_LCD_DUMP
     app_log_poll();

task/task_init.c

@@ -43,6 +43,28 @@ void TaskUIThread_entry(void* parameter)
             StartFlag = 0;
             UI_ReloadTonePreset();  /* 内含 Stop_AutoBand */
         }
+        /* 低电量提示：任意页面全屏覆盖；倒计时期间吞掉其它 UI 刷新，避免盖住提示 */
+        if (xEvent.MessageType == MSG_ID_LOW_BAT_TIP)
+        {
+            uint8_t peek[4];
+            LCD_WR_REG(0x29);
+            LCD_BLK_Set();
+            LCD_FillByColor(0, 0, 240, 320, BLACK);
+            W25Q128_Read(peek, UI0902_LOWBAT_TIP_ADDR, 4);
+            if (peek[0] != 0xFF || peek[1] != 0xFF)
+            {
+                LCD_WR_PIC_FROM_FLASH(0, 0, UI0902_LOWBAT_TIP_W, UI0902_LOWBAT_TIP_H,
+                                      UI0902_LOWBAT_TIP_ADDR);
+            }
+            else
+            {
+                LOG_W("UI", "lowbat flash empty @0x%08lX — flash ui0902",
+                      (unsigned long)UI0902_LOWBAT_TIP_ADDR);
+            }
+            continue;
+        }
+        if (System_LowBat_IsActive())
+            continue;
         CurrUIProcress(xEvent);
       }
    }
@@ -84,15 +106,29 @@ void TaskMainThread_entry(void* parameter)
             case MSG_ID_POWER_ON   : UITask_Sendmsg(MSG_ID_POWER_ON, xEvent.ID, xEvent.HiByte, xEvent.LoByte); break;
             case MSG_ID_POWER_OFF  : break;
             //case MSG_ID_ADCIN1KEY  : ADC_IN1_KEY_Handle(xEvent.ID);break;
-            case MSG_ID_BP_KEY     : Pick_Handle();                break;
+            case MSG_ID_BP_KEY:
-            case MSG_ID_LOOP_LIGHT : Loop_Light_Handle(xEvent.ID); break;
+                if (!System_LowBat_IsActive())
+                    Pick_Handle();
+                break;
+            case MSG_ID_LOOP_LIGHT:
+                if (!System_LowBat_IsActive())
+                    Loop_Light_Handle(xEvent.ID);
+                break;
             case MSG_ID_TM1629_KEY : break;
             case MSG_ID_TM1617_KEY : break;
             case MSG_ID_EC_VOL:
                 /* 任意页面都先下发主音量，避免 UI 未处理导致屏显与实际脱节 */
+                if (!System_LowBat_IsActive())
                     Send_volume((uint8_t)xEvent.ID);
                 UITask_Sendmsg(xEvent.MessageType, xEvent.ID, xEvent.HiByte, xEvent.LoByte);
                 break;
+            case MSG_ID_LOW_BAT_TIP:
+                /* 立即停声，再交给 UI 画提示；主循环 10s 后关机 */
+                Stop_AutoBand();
+                Send_volume(0);
+                System_LowBat_Arm();
+                UITask_Sendmsg(MSG_ID_LOW_BAT_TIP, xEvent.ID, xEvent.HiByte, xEvent.LoByte);
+                break;
             case MSG_ID_TOUCH:
             case MSG_ID_CHARG:
             case MSG_ID_TAP_SPEED:

tools/gen_ui0902_assets.py

@@ -225,6 +225,8 @@ EXTERNAL = [
     ("BOOT_LOGO", "07_开机/开机界面-20.png"),
     ("CHARGE_SCREEN", "08_充电界面/充电界面-0902-09.png"),  # 0904 最新全屏充电稿；百分比重叠由固件绘制
     ("FLASH_MODE", "09_烧录模式/烧录模式-240x320.png"),     # Boot IAP 烧录等待画面
+    # 低电量关机提示（Doc/UI/K1标准界面图 0904/K1 低电量提醒状态界面.zip 合成全屏）
+    ("LOWBAT_TIP", "10_低电量/低电量提醒-240x320.png"),
 ]
 
 
@@ -274,7 +276,7 @@ def main():
         if name in ("ROW_UNIVERSAL_NOT", "ROW_UNIVERSAL_SEL", "ROW_NORMAL_NOT", "ROW_NORMAL_SEL", "ROW_EXPERT_NOT", "ROW_EXPERT_SEL"):
             im = im.resize(ROW_RESIZE, Image.LANCZOS)
             data, w, h = rgba_to_rgb565(im)
-        elif name in ("BOOT_LOGO", "CHARGE_SCREEN", "FLASH_MODE"):
+        elif name in ("BOOT_LOGO", "CHARGE_SCREEN", "FLASH_MODE", "LOWBAT_TIP"):
             if im.size[0] >= 241 and im.size[1] >= 321:
                 im = im.crop((0, 0, 240, 320))
             elif im.size != (240, 320):