ulp-fsm: Update ulp-fsm ADC example with S3 support

Closes https://github.com/espressif/esp-idf/issues/7963

components/ulp/ulp_common/ulp_adc.c

@@ -0,0 +1,59 @@
+/*
+ * SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "sdkconfig.h"
+#include "ulp_adc.h"
+#include "esp_err.h"
+#include "esp_check.h"
+#include "esp_log.h"
+#include "esp_adc/adc_oneshot.h"
+#include "hal/adc_hal_common.h"
+#include "esp_private/esp_sleep_internal.h"
+#include "esp_private/adc_share_hw_ctrl.h"
+
+static const char *TAG = "ulp_adc";
+
+esp_err_t ulp_adc_init(const ulp_adc_cfg_t *cfg)
+{
+    esp_err_t ret = ESP_OK;
+
+    ESP_GOTO_ON_FALSE(cfg, ESP_ERR_INVALID_ARG, err, TAG, "cfg == NULL");
+    ESP_GOTO_ON_FALSE(cfg->adc_n == ADC_UNIT_1, ESP_ERR_INVALID_ARG, err, TAG, "Only ADC_UNIT_1 is supported for now");
+
+    //-------------ADC1 Init---------------//
+    adc_oneshot_unit_handle_t adc1_handle;
+
+    adc_oneshot_unit_init_cfg_t init_config1 = {
+        .unit_id = cfg->adc_n,
+        .ulp_mode = cfg->ulp_mode,
+    };
+
+    if (init_config1.ulp_mode == ADC_ULP_MODE_DISABLE) {
+        /* Default to RISCV for backward compatibility */
+        ESP_LOGI(TAG, "No ulp mode specified in cfg struct, default to riscv");
+        init_config1.ulp_mode = ADC_ULP_MODE_RISCV;
+    }
+
+
+    ESP_ERROR_CHECK(adc_oneshot_new_unit(&init_config1, &adc1_handle));
+
+    //-------------ADC1 Config---------------//
+    adc_oneshot_chan_cfg_t config = {
+        .bitwidth = cfg->width,
+        .atten = cfg->atten,
+    };
+    ESP_ERROR_CHECK(adc_oneshot_config_channel(adc1_handle, cfg->channel, &config));
+
+    //Calibrate the ADC
+#if SOC_ADC_CALIBRATION_V1_SUPPORTED
+    adc_set_hw_calibration_code(cfg->adc_n, cfg->atten);
+#endif
+
+    esp_sleep_enable_adc_tsens_monitor(true);
+
+err:
+    return ret;
+}