주기적 배터리 저전압 및 고온 체크

- 온도 측정 추가

project/ble_peripheral/ble_app_bladder_patch/measurement/battery/battery_saadc.c

@@ -3,8 +3,9 @@
  *
  * Measures battery voltage via nRF52840 SAADC on AIN2:
  *   - 12-bit resolution, 4x oversampling
- *   - Periodic monitoring via battery_loop timer (60 s interval)
+ *   - Periodic safety check via battery_loop timer (60 s interval)
- *   - Auto power-off after 10 consecutive readings below 3500 mV
+ *   - Sequential: battery -> temperature measurement
+ *   - Auto power-off after 5 consecutive readings below 3500 mV or above 40 C
  *   - In info4 mode (bulk sensor collection): stores to info_batt
  *
  * Voltage conversion:
@@ -26,7 +27,8 @@
 #include "app_timer.h"
 #include "battery_saadc.h"
 #include "main_timer.h"
-#include "main.h"
+#include "tmp235_q1.h"
+#include "dr_piezo.h"
 #include "debug_print.h"
 
 /* SAADC internal reference voltage (mV, float) */
@@ -51,12 +53,25 @@ APP_TIMER_DEF(m_battery_loop_timer_id);
 /* Battery monitoring interval (ms) */
 #define BATTERY_LOOP_INTERVAL              60000
 
+/* Safety check consecutive count threshold */
+#define SAFETY_CHECK_COUNT                 5
+
 /* Low-battery check flag — set by battery_loop, consumed by handler */
 bool low_battery_check = false;
 
+/* Safety check mode flag — set by battery handler, consumed by tmp235 handler */
+bool safety_check_mode = false;
+
 /* SAADC callback completion flag — used by all_sensors() to wait */
 volatile bool battery_saadc_done = false;
 
+/* Safety check: cached battery voltage for use in safety_check_complete() */
+static float safety_batt_mv = 0;
+
+/* Safety check: consecutive counters */
+static uint8_t low_battery_cnt = 0;
+static uint8_t over_temp_cnt = 0;
+
 /* info4: bulk sensor collection mode flag */
 extern bool info4;
 
@@ -76,23 +91,73 @@ extern bool motion_raw_data_enabled ;
 extern bool ble_got_new_data;
 extern bool motion_data_once;
 
+/*==============================================================================
+ * safety_check_complete - Called by tmp235 handler after temperature measurement
+ *
+ * Checks both battery voltage and temperature against thresholds.
+ * 5 consecutive readings exceeding either threshold triggers power OFF.
+ *============================================================================*/
+void safety_check_complete(float temp_c)
+{
+    DBG_PRINTF("[SAFETY] Batt=%d mV, Temp=%d.%d C\r\n",
+               (int)safety_batt_mv, (int)temp_c, ((int)(temp_c * 10)) % 10);
+
+    /* Battery check */
+    if (safety_batt_mv <= LOW_BATTERY_VOLTAGE)
+    {
+        low_battery_cnt++;
+        DBG_PRINTF("[SAFETY] Low batt cnt=%d\r\n", low_battery_cnt);
+    }
+    else
+    {
+        low_battery_cnt = 0;
+    }
+
+    /* Temperature check */
+    if (temp_c >= OVER_TEMPERATURE_THRESHOLD)
+    {
+        over_temp_cnt++;
+        DBG_PRINTF("[SAFETY] Over temp cnt=%d\r\n", over_temp_cnt);
+    }
+    else
+    {
+        over_temp_cnt = 0;
+    }
+    
+    /* Power OFF if either threshold exceeded 5 consecutive times */
+    if (low_battery_cnt >= SAFETY_CHECK_COUNT)
+    {
+        low_battery_cnt = 0;
+        DBG_PRINTF("[SAFETY] Low battery -> Power OFF\r\n");
+        go_device_power_off = true;
+        main_timer_start();
+    }
+    else if (over_temp_cnt >= SAFETY_CHECK_COUNT)
+    {
+        over_temp_cnt = 0;
+        DBG_PRINTF("[SAFETY] Over temperature -> Power OFF\r\n");
+        go_device_power_off = true;
+        main_timer_start();
+    }
+
+    dr_piezo_power_off();
+}
+
 /*==============================================================================
  * battery_event_handler - SAADC conversion complete callback
  *
  * Converts the raw ADC value to battery voltage (mV) and then:
- *   - Low-battery check mode: if <= 3500 mV for 10 consecutive times -> power OFF
+ *   - Low-battery check mode: store voltage, chain temperature measurement
  *   - info4 mode: store to info_batt (no BLE send)
  *   - Normal mode: send rsn: response over BLE or UART
  *============================================================================*/
 void battery_event_handler(nrf_drv_saadc_evt_t const * p_event)
 {
-    static uint8_t low_battery_cnt = 0;
-
     if (p_event->type == NRF_DRV_SAADC_EVT_DONE)
     {
         nrf_saadc_value_t register_val = 0;
-        float batt_lvl_in_milli_volt_0 = 0;   /* before divider correction */
+        float batt_lvl_in_milli_volt_0 = 0;
-        float batt_lvl_in_milli_volt_1 = 0;   /* after divider correction */
+        float batt_lvl_in_milli_volt_1 = 0;
 
         register_val = p_event->data.done.p_buffer[0];
 
@@ -106,28 +171,21 @@ void battery_event_handler( nrf_drv_saadc_evt_t const * p_event )
         batt_lvl_in_milli_volt_0 = BATTERY_RESULT_IN_MILLI_VOLTS(register_val);
 
         /* Resistor divider correction factor 1.42 */
-        batt_lvl_in_milli_volt_1 = (batt_lvl_in_milli_volt_0) *1.42f;
+        batt_lvl_in_milli_volt_1 = batt_lvl_in_milli_volt_0 * 1.42f;
 
-        /* --- Low-battery check mode (set by battery_loop timer) --- */
+        /* --- Safety check mode: store voltage, chain temperature measurement --- */
         if (low_battery_check == true)
         {
             low_battery_check = false;
+            safety_batt_mv = batt_lvl_in_milli_volt_1;
+            safety_check_mode = true;
 
-            if(batt_lvl_in_milli_volt_1 <= LOW_BATTERY_VOLTAGE)
+            /* TMP235 shares piezo TX/RX power rail */
+            if (!dr_piezo_is_power_on())
             {
-                if(low_battery_cnt >= 10)
+                dr_piezo_power_on();
-                {
-                    low_battery_cnt = 0;
-                    DBG_PRINTF("Save FDS parameters and then Power OFF\r\n");
-                    go_device_power_off = true;
-                    main_timer_start();
-                }
-                else
-                {
-                    low_battery_cnt++;
-                    DBG_PRINTF("WARNING!!! low_battery cnt = %d, Batt = %d(mV)\r\n", low_battery_cnt, (int)batt_lvl_in_milli_volt_1);
-                }
             }
+            tmp235_voltage_level_meas();
         }
 
         /* --- info4 mode: store value for mbb? bulk response --- */
@@ -165,7 +223,8 @@ static void battery_configure(void)
     saadc_config.resolution = NRF_SAADC_RESOLUTION_12BIT;
     saadc_config.oversample = NRF_SAADC_OVERSAMPLE_4X;
     ret_code_t err_code = nrf_drv_saadc_init(&saadc_config, battery_event_handler);
-    if (err_code != NRF_SUCCESS) {
+    if (err_code != NRF_SUCCESS)
+    {
         return;  /* SAADC busy — skip this cycle, retry next */
     }
 
@@ -199,7 +258,7 @@ void battery_level_meas(void)
  * battery_loop - Periodic battery monitoring timer callback
  *
  * Sets the low-battery check flag and starts a measurement.
- * Skips if another sensor (IMU / info4) is already running (SAADC conflict).
+ * Skips if info4 mode is active (SAADC conflict).
  *============================================================================*/
 void battery_loop(void * p_context)
 {

project/ble_peripheral/ble_app_bladder_patch/measurement/battery/battery_saadc.h

@@ -5,24 +5,35 @@
  *
  * API:
  *   battery_level_meas()            : one-shot measurement (async, result via callback)
- *   battery_timer_init/start/stop() : 5-second periodic monitoring timer
+ *   battery_timer_init/start/stop() : 60-second periodic monitoring timer
  *
- * Auto power-off is triggered after 10 consecutive readings below
+ * Periodic safety check (every 60 s):
- * LOW_BATTERY_VOLTAGE (3500 mV).
+ *   Battery -> Temperature sequential measurement via SAADC.
+ *   Auto power-off after 5 consecutive readings below LOW_BATTERY_VOLTAGE (3500 mV)
+ *   or above OVER_TEMPERATURE_THRESHOLD (40 C).
  *============================================================================*/
 
 #ifndef _BATTERY_SAADC_H_
 #define _BATTERY_SAADC_H_
 
-/* Low-battery threshold (mV) — 10 consecutive readings below this -> power OFF */
+/* Low-battery threshold (mV) — 5 consecutive readings below this -> power OFF */
 #define LOW_BATTERY_VOLTAGE         3500
 
+/* Over-temperature threshold (deg C) — 5 consecutive readings above this -> power OFF */
+#define OVER_TEMPERATURE_THRESHOLD  40.0f
+
 /* SAADC callback completion flag (used by all_sensors() to wait) */
 extern volatile bool battery_saadc_done;
 
+/* Safety check mode flag — set by battery_loop, consumed by tmp235 handler */
+extern bool safety_check_mode;
+
+/* Called by tmp235 handler when safety check temperature measurement completes */
+void safety_check_complete(float temp_c);
+
 /* Start a single async battery measurement. Result handled in callback. */
 void battery_level_meas(void);
-/* Start the 5-second periodic battery monitoring timer. */
+/* Start the 60-second periodic battery monitoring timer. */
 void battery_timer_start(void);
 /* Stop the battery monitoring timer. */
 void battery_timer_stop(void);

project/ble_peripheral/ble_app_bladder_patch/measurement/temperature/tmp235_q1.c

@@ -24,6 +24,7 @@
 #include "tmp235_q1.h"
 #include "main.h"
 #include "main_timer.h"
+#include "battery_saadc.h"
 #include "debug_print.h"
 
 /* SAADC internal reference (mV) */
@@ -101,9 +102,16 @@ void tmp235_voltage_handler(nrf_drv_saadc_evt_t const * p_event)
             DBG_PRINTF("ERR!!! Temperature is over 150c\r\n");
         }
 
-        if (info4 == true)
+        /* --- Safety check mode: pass temperature to battery module for judgment --- */
+        if (safety_check_mode == true)
+        {
+            safety_check_mode = false;
+            safety_check_complete(led_temp);
+        }
+
+        /* --- info4 mode: store value for mbb? bulk response --- */
+        else if (info4 == true)
         {
-            /* Store as integer (e.g. 36.50 C -> 3650) */
             info_temp = (uint16_t)(led_temp * 100);
         }
         else if (cmd_type_t == CMD_UART)