text: // Copyright 2016-2018 Espressif Systems (Shanghai) PTE LTD
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  #include <esp_types.h>
  #include <stdlib.h>
  #include <ctype.h>
  #include "esp_log.h"
  #include "sys/lock.h"
  #include "soc/soc_pins.h"
  #include "freertos/FreeRTOS.h"
  #include "freertos/xtensa_api.h"
  #include "freertos/semphr.h"
  #include "freertos/timers.h"
  #include "esp_intr_alloc.h"
  #include "driver/rtc_io.h"
  #include "driver/touch_pad.h"
  #include "driver/rtc_cntl.h"
  #include "driver/gpio.h"
  #include "sdkconfig.h"
  
  #include "hal/touch_sensor_types.h"
  #include "hal/touch_sensor_hal.h"
  
  #ifndef NDEBUG
  // Enable built-in checks in queue.h in debug builds
  #define INVARIANTS
  #endif
  #include "sys/queue.h"
  
  #define TOUCH_PAD_FILTER_FACTOR_DEFAULT   (4)   // IIR filter coefficient.
  #define TOUCH_PAD_SHIFT_DEFAULT           (4)   // Increase computing accuracy.
  #define TOUCH_PAD_SHIFT_ROUND_DEFAULT     (8)   // ROUND = 2^(n-1); rounding off for fractional.
  #define TOUCH_PAD_MEASURE_WAIT_DEFAULT  (0xFF)  // The timer frequency is 8Mhz, the max value is 0xff
  
  static const char *TOUCH_TAG = "TOUCH_SENSOR";
  #define TOUCH_CHECK(a, str, ret_val) ({                                             \
      if (!(a)) {                                                                     \
          ESP_LOGE(TOUCH_TAG,"%s(%d): %s", __FUNCTION__, __LINE__, str);              \
          return (ret_val);                                                           \
      }                                                                               \
  })
  #define TOUCH_CHANNEL_CHECK(channel) do { \
          TOUCH_CHECK(channel < SOC_TOUCH_SENSOR_NUM && channel >= 0, "Touch channel error", ESP_ERR_INVALID_ARG); \
          TOUCH_CHECK(channel != SOC_TOUCH_DENOISE_CHANNEL, "TOUCH0 is internal denoise channel", ESP_ERR_INVALID_ARG); \
      } while (0);
  #define TOUCH_CH_MASK_CHECK(mask) TOUCH_CHECK((mask <= TOUCH_PAD_BIT_MASK_ALL), "touch channel bitmask error", ESP_ERR_INVALID_ARG)
  #define TOUCH_INTR_MASK_CHECK(mask) TOUCH_CHECK(mask & TOUCH_PAD_INTR_MASK_ALL, "intr mask error", ESP_ERR_INVALID_ARG)
  #define TOUCH_PARAM_CHECK_STR(s)           ""s" parameter error"
  
  extern portMUX_TYPE rtc_spinlock; //TODO: Will be placed in the appropriate position after the rtc module is finished.
  #define TOUCH_ENTER_CRITICAL_SAFE()  portENTER_CRITICAL_SAFE(&rtc_spinlock) // Can be called in isr and task.
  #define TOUCH_EXIT_CRITICAL_SAFE()  portEXIT_CRITICAL_SAFE(&rtc_spinlock)
  #define TOUCH_ENTER_CRITICAL()  portENTER_CRITICAL(&rtc_spinlock)
  #define TOUCH_EXIT_CRITICAL()  portEXIT_CRITICAL(&rtc_spinlock)
  
  static SemaphoreHandle_t rtc_touch_mux = NULL;
  
  /*---------------------------------------------------------------
                      Touch Pad
  ---------------------------------------------------------------*/
  
  /** Workaround for scan done interrupt issue. */
  static void touch_pad_workaround_isr_internal(void *arg)
  {
      uint16_t ch_mask = 0;
      uint32_t intr_mask = touch_hal_read_intr_status_mask();
      uint32_t pad_num = touch_hal_get_current_meas_channel();
      /* Make sure that the scan done interrupt is generated after the last channel measurement is completed. */
      if (intr_mask & TOUCH_PAD_INTR_MASK_SCAN_DONE) {
          touch_hal_get_channel_mask(&ch_mask);
          for (int i = TOUCH_PAD_MAX - 1; i >= 0; i--) {
              if (BIT(i) & ch_mask) {
                  if (pad_num != i) {
                      touch_hal_intr_clear(TOUCH_PAD_INTR_MASK_SCAN_DONE);
                  }
                  break;
              }
          }
      }
  }
  
  esp_err_t touch_pad_isr_register(intr_handler_t fn, void *arg, touch_pad_intr_mask_t intr_mask)
  {
      static bool reg_flag = false;
      TOUCH_CHECK(fn != NULL, TOUCH_PARAM_CHECK_STR("intr_mask"), ESP_ERR_INVALID_ARG);
      TOUCH_INTR_MASK_CHECK(intr_mask);
  
      uint32_t en_msk = 0;
      if (intr_mask & TOUCH_PAD_INTR_MASK_DONE) {
          en_msk |= RTC_CNTL_TOUCH_DONE_INT_ST_M;
      }
      if (intr_mask & TOUCH_PAD_INTR_MASK_ACTIVE) {
          en_msk |= RTC_CNTL_TOUCH_ACTIVE_INT_ST_M;
      }
      if (intr_mask & TOUCH_PAD_INTR_MASK_INACTIVE) {
          en_msk |= RTC_CNTL_TOUCH_INACTIVE_INT_ST_M;
      }
      if (intr_mask & TOUCH_PAD_INTR_MASK_SCAN_DONE) {
          en_msk |= RTC_CNTL_TOUCH_SCAN_DONE_INT_ST_M;
      }
      if (intr_mask & TOUCH_PAD_INTR_MASK_TIMEOUT) {
          en_msk |= RTC_CNTL_TOUCH_TIMEOUT_INT_ST_M;
      }
      esp_err_t ret = rtc_isr_register(fn, arg, en_msk);
      /* Must ensure: After being registered, it is executed first. */
      if ( (ret == ESP_OK) && (reg_flag == false) && (intr_mask & (TOUCH_PAD_INTR_MASK_SCAN_DONE | TOUCH_PAD_INTR_MASK_TIMEOUT)) ) {
          rtc_isr_register(touch_pad_workaround_isr_internal, NULL, RTC_CNTL_TOUCH_SCAN_DONE_INT_ST_M | RTC_CNTL_TOUCH_TIMEOUT_INT_ST_M);
          reg_flag = true;
      }
  
      return ret;
  }
  
  esp_err_t touch_pad_set_meas_time(uint16_t sleep_cycle, uint16_t meas_times)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_set_meas_times(meas_times);
      touch_hal_set_sleep_time(sleep_cycle);
      TOUCH_EXIT_CRITICAL();
  
      return ESP_OK;
  }
  
  esp_err_t touch_pad_get_meas_time(uint16_t *sleep_cycle, uint16_t *meas_times)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_get_measure_times(meas_times);
      touch_hal_get_sleep_time(sleep_cycle);
      TOUCH_EXIT_CRITICAL();
  
      return ESP_OK;
  }
  
  esp_err_t touch_pad_set_idle_channel_connect(touch_pad_conn_type_t type)
  {
      TOUCH_CHECK(type < TOUCH_PAD_CONN_MAX, TOUCH_PARAM_CHECK_STR("type"), ESP_ERR_INVALID_ARG);
      TOUCH_ENTER_CRITICAL();
      touch_hal_set_idle_channel_connect(type);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_get_idle_channel_connect(touch_pad_conn_type_t *type)
  {
      touch_hal_get_idle_channel_connect(type);
      return ESP_OK;
  }
  
  bool touch_pad_meas_is_done(void)
  {
      return touch_hal_meas_is_done();
  }
  
  esp_err_t touch_pad_set_channel_mask(uint16_t enable_mask)
  {
      TOUCH_CH_MASK_CHECK(enable_mask);
      TOUCH_ENTER_CRITICAL();
      touch_hal_set_channel_mask(enable_mask);
      TOUCH_EXIT_CRITICAL();
  
      return ESP_OK;
  }
  
  esp_err_t touch_pad_get_channel_mask(uint16_t *enable_mask)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_get_channel_mask(enable_mask);
      TOUCH_EXIT_CRITICAL();
  
      return ESP_OK;
  }
  
  esp_err_t touch_pad_clear_channel_mask(uint16_t enable_mask)
  {
      TOUCH_CH_MASK_CHECK(enable_mask);
      TOUCH_ENTER_CRITICAL();
      touch_hal_clear_channel_mask(enable_mask);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  touch_pad_t IRAM_ATTR touch_pad_get_current_meas_channel(void)
  {
      return (touch_pad_t)touch_hal_get_current_meas_channel();
  }
  
  esp_err_t touch_pad_intr_enable(touch_pad_intr_mask_t int_mask)
  {
      TOUCH_INTR_MASK_CHECK(int_mask);
      TOUCH_ENTER_CRITICAL();
      touch_hal_intr_enable(int_mask);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_intr_disable(touch_pad_intr_mask_t int_mask)
  {
      TOUCH_INTR_MASK_CHECK(int_mask);
      TOUCH_ENTER_CRITICAL();
      touch_hal_intr_disable(int_mask);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_intr_clear(touch_pad_intr_mask_t int_mask)
  {
      TOUCH_INTR_MASK_CHECK(int_mask);
      TOUCH_ENTER_CRITICAL();
      touch_hal_intr_clear(int_mask);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  uint32_t touch_pad_read_intr_status_mask(void)
  {
      return touch_hal_read_intr_status_mask();
  }
  
  esp_err_t touch_pad_timeout_set(bool enable, uint32_t threshold)
  {
      TOUCH_ENTER_CRITICAL();
      if (enable) {
          touch_hal_timeout_enable();
      } else {
          touch_hal_timeout_disable();
      }
      touch_hal_timeout_set_threshold(threshold);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_timeout_get_threshold(uint32_t *threshold)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_timeout_get_threshold(threshold);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_timeout_resume(void)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_timer_force_done();
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_config(touch_pad_t touch_num)
  {
      TOUCH_CHANNEL_CHECK(touch_num);
  
      touch_pad_io_init(touch_num);
      TOUCH_ENTER_CRITICAL();
      touch_hal_config(touch_num);
      touch_hal_set_channel_mask(BIT(touch_num));
      TOUCH_EXIT_CRITICAL();
  
      return ESP_OK;
  }
  
  esp_err_t touch_pad_init(void)
  {
      if (rtc_touch_mux == NULL) {
          rtc_touch_mux = xSemaphoreCreateMutex();
      }
      if (rtc_touch_mux == NULL) {
          return ESP_ERR_NO_MEM;
      }
      TOUCH_ENTER_CRITICAL();
      touch_hal_init();
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_deinit(void)
  {
      TOUCH_CHECK(rtc_touch_mux != NULL, "Touch pad not initialized", ESP_FAIL);
      xSemaphoreTake(rtc_touch_mux, portMAX_DELAY);
      TOUCH_ENTER_CRITICAL();
      touch_hal_deinit();
      TOUCH_EXIT_CRITICAL();
      xSemaphoreGive(rtc_touch_mux);
      vSemaphoreDelete(rtc_touch_mux);
      rtc_touch_mux = NULL;
      return ESP_OK;
  }
  
  esp_err_t touch_pad_reset(void)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_reset();
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t IRAM_ATTR touch_pad_read_raw_data(touch_pad_t touch_num, uint32_t *raw_data)
  {
      TOUCH_CHECK(touch_num < TOUCH_PAD_MAX && touch_num >= 0, "Touch channel error", ESP_ERR_INVALID_ARG);
      TOUCH_ENTER_CRITICAL_SAFE();
      *raw_data = touch_hal_read_raw_data(touch_num);
      TOUCH_EXIT_CRITICAL_SAFE();
      return ESP_OK;
  }
  
  esp_err_t IRAM_ATTR touch_pad_filter_read_smooth(touch_pad_t touch_num, uint32_t *smooth_data)
  {
      TOUCH_CHANNEL_CHECK(touch_num);
      TOUCH_ENTER_CRITICAL_SAFE();
      touch_hal_filter_read_smooth(touch_num, smooth_data);
      TOUCH_EXIT_CRITICAL_SAFE();
      return ESP_OK;
  }
  
  esp_err_t IRAM_ATTR touch_pad_read_benchmark(touch_pad_t touch_num, uint32_t *benchmark)
  {
      TOUCH_CHANNEL_CHECK(touch_num);
      TOUCH_ENTER_CRITICAL_SAFE();
      touch_hal_read_benchmark(touch_num, benchmark);
      TOUCH_EXIT_CRITICAL_SAFE();
      return ESP_OK;
  }
  
  /* Should be call after clk enable and filter enable. */
  esp_err_t touch_pad_reset_benchmark(touch_pad_t touch_num)
  {
      TOUCH_CHECK(touch_num <= TOUCH_PAD_MAX && touch_num >= 0, "Touch channel error", ESP_ERR_INVALID_ARG);
      TOUCH_ENTER_CRITICAL();
      touch_hal_reset_benchmark(touch_num);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_filter_set_config(touch_filter_config_t *filter_info)
  {
      TOUCH_CHECK(filter_info->mode < TOUCH_PAD_FILTER_MAX, TOUCH_PARAM_CHECK_STR("mode"), ESP_ERR_INVALID_ARG);
      TOUCH_CHECK(filter_info->debounce_cnt <= TOUCH_DEBOUNCE_CNT_MAX, TOUCH_PARAM_CHECK_STR("debounce"), ESP_ERR_INVALID_ARG);
      TOUCH_CHECK(filter_info->noise_thr <= TOUCH_NOISE_THR_MAX, TOUCH_PARAM_CHECK_STR("noise"), ESP_ERR_INVALID_ARG);
      TOUCH_CHECK(filter_info->jitter_step <= TOUCH_JITTER_STEP_MAX, TOUCH_PARAM_CHECK_STR("jitter_step"), ESP_ERR_INVALID_ARG);
      TOUCH_CHECK(filter_info->smh_lvl < TOUCH_PAD_SMOOTH_MAX, TOUCH_PARAM_CHECK_STR("smooth level"), ESP_ERR_INVALID_ARG);
  
      TOUCH_ENTER_CRITICAL();
      touch_hal_filter_set_config(filter_info);
      TOUCH_EXIT_CRITICAL();
  
      return ESP_OK;
  }
  
  esp_err_t touch_pad_filter_get_config(touch_filter_config_t *filter_info)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_filter_get_config(filter_info);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_filter_enable(void)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_filter_enable();
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_filter_disable(void)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_filter_disable();
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_denoise_enable(void)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_clear_channel_mask(BIT(SOC_TOUCH_DENOISE_CHANNEL));
      touch_hal_denoise_enable();
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_denoise_disable(void)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_denoise_disable();
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_denoise_set_config(touch_pad_denoise_t *denoise)
  {
      TOUCH_CHECK(denoise->grade < TOUCH_PAD_DENOISE_MAX, TOUCH_PARAM_CHECK_STR("grade"), ESP_ERR_INVALID_ARG);
      TOUCH_CHECK(denoise->cap_level < TOUCH_PAD_DENOISE_CAP_MAX, TOUCH_PARAM_CHECK_STR("cap_level"), ESP_ERR_INVALID_ARG);
  
      const touch_hal_meas_mode_t meas = {
          .slope = TOUCH_PAD_SLOPE_DEFAULT,
          .tie_opt = TOUCH_PAD_TIE_OPT_DEFAULT,
      };
      TOUCH_ENTER_CRITICAL();
      touch_hal_set_meas_mode(SOC_TOUCH_DENOISE_CHANNEL, &meas);
      touch_hal_denoise_set_config(denoise);
      TOUCH_EXIT_CRITICAL();
  
      return ESP_OK;
  }
  
  esp_err_t touch_pad_denoise_get_config(touch_pad_denoise_t *denoise)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_denoise_get_config(denoise);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_denoise_read_data(uint32_t *data)
  {
      touch_hal_denoise_read_data(data);
      return ESP_OK;
  }
  
  esp_err_t touch_pad_waterproof_set_config(touch_pad_waterproof_t *waterproof)
  {
      TOUCH_CHECK(waterproof->guard_ring_pad < SOC_TOUCH_SENSOR_NUM, TOUCH_PARAM_CHECK_STR("pad"), ESP_ERR_INVALID_ARG);
      TOUCH_CHECK(waterproof->shield_driver < TOUCH_PAD_SHIELD_DRV_MAX, TOUCH_PARAM_CHECK_STR("shield_driver"), ESP_ERR_INVALID_ARG);
  
      TOUCH_ENTER_CRITICAL();
      touch_hal_waterproof_set_config(waterproof);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_waterproof_get_config(touch_pad_waterproof_t *waterproof)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_waterproof_get_config(waterproof);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_waterproof_enable(void)
  {
      touch_pad_io_init(SOC_TOUCH_SHIELD_CHANNEL);
      TOUCH_ENTER_CRITICAL();
      touch_hal_waterproof_enable();
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_waterproof_disable(void)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_waterproof_disable();
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_proximity_enable(touch_pad_t touch_num, bool enabled)
  {
      esp_err_t ret = ESP_OK;
      TOUCH_CHECK(touch_num < TOUCH_PAD_MAX, "Touch channel error", ESP_ERR_INVALID_ARG);
  
      TOUCH_ENTER_CRITICAL();
      if (!touch_hal_enable_proximity(touch_num, enabled)) {
          ret = ESP_ERR_NOT_SUPPORTED;
      }
      TOUCH_EXIT_CRITICAL();
      return ret;
  }
  
  esp_err_t touch_pad_proximity_set_count(touch_pad_t touch_num, uint32_t count)
  {
      TOUCH_CHECK(count <= TOUCH_PROXIMITY_MEAS_NUM_MAX, TOUCH_PARAM_CHECK_STR("measure count"), ESP_ERR_INVALID_ARG);
  
      TOUCH_ENTER_CRITICAL();
      touch_hal_proximity_set_meas_times(count);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_proximity_get_count(touch_pad_t touch_num, uint32_t *count)
  {
      TOUCH_CHECK(count != NULL, TOUCH_PARAM_CHECK_STR("measure count"), ESP_ERR_INVALID_ARG);
  
      TOUCH_ENTER_CRITICAL_SAFE();
      touch_hal_proximity_get_meas_times(count);
      TOUCH_EXIT_CRITICAL_SAFE();
      return ESP_OK;
  }
  
  /**
   * @brief Get measure count of proximity channel.
   *        The proximity sensor measurement is the accumulation of touch channel measurements.
   * @param touch_num touch pad index
   * @param cnt Pointer to receive proximity channel measurement count
   * @return
   *     - ESP_OK Success
   *     - ESP_ERR_INVALID_ARG parameter is NULL
   */
  esp_err_t touch_pad_proximity_read_meas_cnt(touch_pad_t touch_num, uint32_t *cnt)
  {
      TOUCH_CHECK(touch_hal_proximity_pad_check(touch_num), "touch num is not proximity", ESP_ERR_INVALID_ARG);
      TOUCH_ENTER_CRITICAL_SAFE();
      touch_hal_proximity_read_meas_cnt(touch_num, cnt);
      TOUCH_EXIT_CRITICAL_SAFE();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_proximity_get_data(touch_pad_t touch_num, uint32_t *measure_out)
  {
      TOUCH_CHECK(touch_hal_proximity_pad_check(touch_num), "touch num is not proximity", ESP_ERR_INVALID_ARG);
      TOUCH_ENTER_CRITICAL_SAFE();
      touch_hal_read_benchmark(touch_num, measure_out);
      TOUCH_EXIT_CRITICAL_SAFE();
      return ESP_OK;
  }
  
  /************** sleep pad setting ***********************/
  
  esp_err_t touch_pad_sleep_channel_get_info(touch_pad_sleep_channel_t *slp_config)
  {
      TOUCH_ENTER_CRITICAL_SAFE();
      touch_hal_sleep_channel_get_config(slp_config);
      TOUCH_EXIT_CRITICAL_SAFE();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_sleep_channel_enable(touch_pad_t pad_num, bool enable)
  {
      TOUCH_CHANNEL_CHECK(pad_num);
  
      TOUCH_ENTER_CRITICAL();
      touch_hal_sleep_channel_enable(pad_num, enable);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_sleep_channel_enable_proximity(touch_pad_t pad_num, bool enable)
  {
      TOUCH_CHANNEL_CHECK(pad_num);
  
      TOUCH_ENTER_CRITICAL();
      if (enable) {
          touch_hal_sleep_enable_approach();
      } else {
          touch_hal_sleep_disable_approach();
      }
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_sleep_get_channel_num(touch_pad_t *pad_num)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_sleep_get_channel_num(pad_num);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_sleep_set_threshold(touch_pad_t pad_num, uint32_t touch_thres)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_sleep_set_threshold(touch_thres);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_sleep_get_threshold(touch_pad_t pad_num, uint32_t *touch_thres)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_sleep_get_threshold(touch_thres);
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_sleep_channel_read_benchmark(touch_pad_t pad_num, uint32_t *benchmark)
  {
      TOUCH_ENTER_CRITICAL_SAFE();
      touch_hal_sleep_read_benchmark(benchmark);
      TOUCH_EXIT_CRITICAL_SAFE();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_sleep_channel_read_smooth(touch_pad_t pad_num, uint32_t *smooth_data)
  {
      TOUCH_ENTER_CRITICAL_SAFE();
      touch_hal_sleep_read_smooth(smooth_data);
      TOUCH_EXIT_CRITICAL_SAFE();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_sleep_channel_read_data(touch_pad_t pad_num, uint32_t *raw_data)
  {
      TOUCH_ENTER_CRITICAL_SAFE();
      touch_hal_sleep_read_data(raw_data);
      TOUCH_EXIT_CRITICAL_SAFE();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_sleep_channel_reset_benchmark(void)
  {
      TOUCH_ENTER_CRITICAL();
      touch_hal_sleep_reset_benchmark();
      TOUCH_EXIT_CRITICAL();
      return ESP_OK;
  }
  
  esp_err_t touch_pad_sleep_channel_read_debounce(touch_pad_t pad_num, uint32_t *debounce)
  {
      touch_hal_sleep_read_debounce(debounce);
      return ESP_OK;
  }
  
  esp_err_t touch_pad_sleep_channel_read_proximity_cnt(touch_pad_t pad_num, uint32_t *approach_cnt)
  {
      touch_hal_sleep_read_proximity_cnt(approach_cnt);
      return ESP_OK;
  }
  