chore: snapshot before shared RS485 bus integration

components/evse/evse_pilot.c

@@ -10,6 +10,7 @@
 
 #include "evse_pilot.h"
 #include "adc121s021_dma.h"
+#include "adc.h"
 #include "board_config.h"
 
 #define PILOT_PWM_TIMER       LEDC_TIMER_0
@@ -27,7 +28,8 @@
 // Percentagem para descartar extremos superior/inferior (ruído)
 #define PILOT_EXTREME_PERCENT 10 // 10% superior e inferior
 
-// ADC referência
+// Referência usada pelo ADC121S021 externo.
+// No ADC interno, o valor já é convertido para mV por adc_cali_raw_to_voltage().
 #define ADC121_VREF_MV 3300
 #define ADC121_MAX     4095
 
@@ -41,24 +43,100 @@ typedef enum {
 
 static pilot_mode_t s_mode = PILOT_MODE_DC_LOW;
 static uint32_t     last_pwm_duty = 0;
+static bool         s_internal_adc_configured = false;
 
 // ---------------------
 // Helpers internos
 // ---------------------
-static int adc_raw_to_mv(uint16_t raw)
+static int adc121_raw_to_mv(uint16_t raw)
 {
     return (int)((raw * ADC121_VREF_MV) / ADC121_MAX);
 }
 
-static int compare_uint16(const void *a, const void *b)
+static int compare_int(const void *a, const void *b)
 {
-    uint16_t va = *(const uint16_t *)a;
-    uint16_t vb = *(const uint16_t *)b;
+    int va = *(const int *)a;
+    int vb = *(const int *)b;
     if (va < vb) return -1;
     if (va > vb) return 1;
     return 0;
 }
 
+static bool pilot_adc_read_mv(int *mv)
+{
+    if (!mv)
+    {
+        return false;
+    }
+
+    if (board_config.pilot_adc_source == BOARD_CONFIG_PILOT_ADC_INTERNAL_ESP32)
+    {
+        if (!adc_handle || !adc_cali_handle)
+        {
+            ESP_LOGE(TAG, "ADC interno não inicializado/calibrado");
+            return false;
+        }
+
+        int raw = 0;
+        esp_err_t err;
+
+        adc_lock();
+        err = adc_oneshot_read(adc_handle, board_config.pilot_adc_channel, &raw);
+        if (err == ESP_OK)
+        {
+            err = adc_cali_raw_to_voltage(adc_cali_handle, raw, mv);
+        }
+        adc_unlock();
+
+        if (err != ESP_OK)
+        {
+            ESP_LOGE(TAG, "Erro ao ler/converter ADC interno do pilot: %s", esp_err_to_name(err));
+            return false;
+        }
+
+        return true;
+    }
+
+    uint16_t raw = 0;
+    if (!adc121s021_dma_get_sample(&raw))
+    {
+        return false;
+    }
+
+    *mv = adc121_raw_to_mv(raw);
+    return true;
+}
+
+static void pilot_adc_init(void)
+{
+    if (board_config.pilot_adc_source == BOARD_CONFIG_PILOT_ADC_INTERNAL_ESP32)
+    {
+        if (!adc_handle)
+        {
+            adc_init();
+        }
+
+        if (!s_internal_adc_configured)
+        {
+            adc_oneshot_chan_cfg_t config = {
+                .bitwidth = ADC_BITWIDTH_DEFAULT,
+                .atten = ADC_ATTEN_DB_12
+            };
+            ESP_ERROR_CHECK(adc_oneshot_config_channel(adc_handle,
+                                                       board_config.pilot_adc_channel,
+                                                       &config));
+            s_internal_adc_configured = true;
+        }
+
+        ESP_LOGI(TAG, "Pilot ADC: interno ESP32 ADC1_CH%d",
+                 (int)board_config.pilot_adc_channel);
+        return;
+    }
+
+    ESP_LOGI(TAG, "Pilot ADC: ADC121S021 externo via SPI");
+    adc121s021_dma_init();
+}
+
 // ---------------------
 // Inicialização PWM + ADC
 // ---------------------
@@ -91,8 +169,8 @@ void pilot_init(void)
     s_mode = PILOT_MODE_DC_LOW;
     last_pwm_duty = 0;
 
-    // Inicializa driver do ADC121S021
-    adc121s021_dma_init();
+    // Inicializa o backend de leitura do pilot configurado na board.
+    pilot_adc_init();
 }
 
 // ---------------------
@@ -165,17 +243,17 @@ void pilot_measure(pilot_voltage_t *up_voltage, bool *down_voltage_n12)
 {
     ESP_LOGD(TAG, "pilot_measure");
 
-    uint16_t samples[NUM_PILOT_SAMPLES];
+    int samples_mv[NUM_PILOT_SAMPLES];
     int collected = 0;
     int attempts  = 0;
 
     while (collected < NUM_PILOT_SAMPLES && attempts < MAX_SAMPLE_ATTEMPTS)
     {
-        uint16_t adc_sample;
+        int sample_mv = 0;
 
-        if (adc121s021_dma_get_sample(&adc_sample))
+        if (pilot_adc_read_mv(&sample_mv))
         {
-            samples[collected++] = adc_sample;
+            samples_mv[collected++] = sample_mv;
             esp_rom_delay_us(PILOT_SAMPLE_DELAY_US);
         }
         else
@@ -194,7 +272,7 @@ void pilot_measure(pilot_voltage_t *up_voltage, bool *down_voltage_n12)
     }
 
     // Ordena as amostras para eliminar extremos (ruído/espúrios)
-    qsort(samples, collected, sizeof(uint16_t), compare_uint16);
+    qsort(samples_mv, collected, sizeof(int), compare_int);
 
     int k = (collected * PILOT_EXTREME_PERCENT) / 100;
     if (k < 2) k = 2; // garante margem mínima
@@ -207,11 +285,8 @@ void pilot_measure(pilot_voltage_t *up_voltage, bool *down_voltage_n12)
     if (high_index >= collected) high_index = collected - 1;
     if (high_index <= low_index) high_index = low_index;
 
-    uint16_t low_raw  = samples[low_index];
-    uint16_t high_raw = samples[high_index];
-
-    int high_mv = adc_raw_to_mv(high_raw);
-    int low_mv  = adc_raw_to_mv(low_raw);
+    int low_mv  = samples_mv[low_index];
+    int high_mv = samples_mv[high_index];
 
     // Determina o nível positivo (+12, +9, +6, +3 ou <3 V)
     if (high_mv >= board_config.pilot_down_threshold_12)