chore: snapshot before shared RS485 bus integration

components/peripherals/include/adc.h

@@ -11,4 +11,7 @@ extern adc_cali_handle_t adc_cali_handle;
 
 void adc_init(void);
 
+void adc_lock(void);
+void adc_unlock(void);
+
 #endif /* ADC_H_ */

components/peripherals/src/adc.c

@@ -1,5 +1,7 @@
 #include "adc.h"
 #include "esp_log.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/semphr.h"
 
 const static char* TAG = "adc";
 
@@ -7,8 +9,40 @@ adc_oneshot_unit_handle_t adc_handle;
 
 adc_cali_handle_t adc_cali_handle;
 
+static SemaphoreHandle_t s_adc_mutex;
+
+static void adc_mutex_init(void)
+{
+    if (!s_adc_mutex)
+    {
+        s_adc_mutex = xSemaphoreCreateMutex();
+        ESP_ERROR_CHECK(s_adc_mutex ? ESP_OK : ESP_ERR_NO_MEM);
+    }
+}
+
+void adc_lock(void)
+{
+    adc_mutex_init();
+    xSemaphoreTake(s_adc_mutex, portMAX_DELAY);
+}
+
+void adc_unlock(void)
+{
+    if (s_adc_mutex)
+    {
+        xSemaphoreGive(s_adc_mutex);
+    }
+}
+
 void adc_init(void)
 {
+    adc_mutex_init();
+    if (adc_handle)
+    {
+        ESP_LOGD(TAG, "ADC já inicializado");
+        return;
+    }
+
     adc_oneshot_unit_init_cfg_t conf = {
         .unit_id = ADC_UNIT_1
     };

components/peripherals/src/ntc_sensor.c

@@ -19,7 +19,11 @@ static void ntc_sensor_task_func(void *param)
     float t;
     while (true)
     {
-        if (ntc_dev_get_temperature(ntc, &t) == ESP_OK)
+        adc_lock();
+        esp_err_t err = ntc_dev_get_temperature(ntc, &t);
+        adc_unlock();
+
+        if (err == ESP_OK)
         {
             portENTER_CRITICAL(&temp_mux);
             temp = t;
@@ -59,7 +63,9 @@ void ntc_sensor_init(void)
 
     // Leitura inicial para log
     float t0 = 0.0f;
+    adc_lock();
     esp_err_t err = ntc_dev_get_temperature(ntc, &t0);
+    adc_unlock();
     if (err == ESP_OK)
     {
         portENTER_CRITICAL(&temp_mux);

components/peripherals/src/proximity.c

@@ -19,9 +19,22 @@ void proximity_init(void)
 
 uint8_t proximity_get_max_current(void)
 {
-    int voltage;
-    adc_oneshot_read(adc_handle, board_config.proximity_adc_channel, &voltage);
-    adc_cali_raw_to_voltage(adc_cali_handle, voltage, &voltage);
+    int raw = 0;
+    int voltage = 0;
+
+    adc_lock();
+    esp_err_t err = adc_oneshot_read(adc_handle, board_config.proximity_adc_channel, &raw);
+    if (err == ESP_OK)
+    {
+        err = adc_cali_raw_to_voltage(adc_cali_handle, raw, &voltage);
+    }
+    adc_unlock();
+
+    if (err != ESP_OK)
+    {
+        ESP_LOGW(TAG, "Erro ao ler/converter ADC proximity: %s", esp_err_to_name(err));
+        return 32;
+    }
 
     ESP_LOGI(TAG, "Measured: %dmV", voltage);