add ADC function

esp32_s3_lcd_ev_board/include/bsp/esp32_s3_lcd_ev_board.h

@@ -493,6 +493,34 @@ __attribute__((deprecated("use espressif/button API instead")));
  */
 esp_err_t bsp_iot_button_create(button_handle_t btn_array[], int *btn_cnt, int btn_array_size);
 
+/**************************************************************************************************
+ *
+ * ADC interface
+ *
+ * After initialization of ADC, use `adc_handle` when using ADC driver.
+ *
+ **************************************************************************************************/
+#define BSP_ADC_UNIT     ADC_UNIT_1
+
+/**
+ * @brief Initialize ADC
+ *
+ * The ADC can be initialized inside BSP, when needed.
+ *
+ * @param[out] adc_handle Returned ADC handle
+ */
+esp_err_t bsp_adc_initialize(void);
+
+
+/**
+ * @brief Get ADC handle
+ *
+ * @note This function is available only in IDF5 and higher
+ *
+ * @return ADC handle
+ */
+adc_oneshot_unit_handle_t bsp_adc_get_handle(void);
+
 #ifdef __cplusplus
 }
 #endif

esp32_s3_lcd_ev_board/src/esp32_s3_lcd_ev_board.c

@@ -383,3 +383,29 @@ esp_err_t bsp_iot_button_create(button_handle_t btn_array[], int *btn_cnt, int b
     }
     return ret;
 }
+
+/**************************************************************************************************
+ *
+ * ADC Funciton
+ *
+ **************************************************************************************************/
+esp_err_t bsp_adc_initialize(void)
+{
+    /* ADC was initialized before */
+    if (bsp_adc_handle != NULL) {
+        return ESP_OK;
+    }
+
+    /* Initialize ADC */
+    const adc_oneshot_unit_init_cfg_t init_config1 = {
+        .unit_id = BSP_ADC_UNIT,
+    };
+    BSP_ERROR_CHECK_RETURN_ERR(adc_oneshot_new_unit(&init_config1, &bsp_adc_handle));
+
+    return ESP_OK;
+}
+
+adc_oneshot_unit_handle_t bsp_adc_get_handle(void)
+{
+    return bsp_adc_handle;
+}