465 lines
17 KiB
C
465 lines
17 KiB
C
// Copyright 2019 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* @brief Set touch sensor FSM start
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* @note Start FSM after the touch sensor FSM mode is set.
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* @note Call this function will reset beseline of all touch channels.
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* @return
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* - ESP_OK on success
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*/
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esp_err_t touch_pad_fsm_start(void);
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/**
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* @brief Stop touch sensor FSM.
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* @return
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* - ESP_OK on success
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*/
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esp_err_t touch_pad_fsm_stop(void);
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/**
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* @brief Trigger a touch sensor measurement, only support in SW mode of FSM
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* @return
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* - ESP_OK on success
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*/
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esp_err_t touch_pad_sw_start(void);
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/**
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* @brief Set touch sensor times of charge and discharge and sleep time.
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* Excessive total time will slow down the touch response.
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* Too small measurement time will not be sampled enough, resulting in inaccurate measurements.
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*
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* @note The greater the duty cycle of the measurement time, the more system power is consumed.
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* @param sleep_cycle The touch sensor will sleep after each measurement.
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* sleep_cycle decide the interval between each measurement.
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* t_sleep = sleep_cycle / (RTC_SLOW_CLK frequency).
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* The approximate frequency value of RTC_SLOW_CLK can be obtained using rtc_clk_slow_freq_get_hz function.
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* @param meas_timers The times of charge and discharge in each measure process of touch channels.
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* The timer frequency is 8Mhz. Range: 0 ~ 0xffff.
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* Recommended typical value: Modify this value to make the measurement time around 1ms.
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* @return
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* - ESP_OK on success
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*/
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esp_err_t touch_pad_set_meas_time(uint16_t sleep_cycle, uint16_t meas_times);
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/**
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* @brief Get touch sensor times of charge and discharge and sleep time
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* @param sleep_cycle Pointer to accept sleep cycle number
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* @param meas_times Pointer to accept measurement times count.
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* @return
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* - ESP_OK on success
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*/
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esp_err_t touch_pad_get_meas_time(uint16_t *sleep_cycle, uint16_t *meas_times);
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/**
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* @brief Set connection type of touch channel in idle status.
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* When a channel is in measurement mode, other initialized channels are in idle mode.
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* The touch channel is generally adjacent to the trace, so the connection state of the idle channel
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* affects the stability and sensitivity of the test channel.
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* The `CONN_HIGHZ`(high resistance) setting increases the sensitivity of touch channels.
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* The `CONN_GND`(grounding) setting increases the stability of touch channels.
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* @param type Select idle channel connect to high resistance state or ground.
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* @return
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* - ESP_OK on success
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*/
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esp_err_t touch_pad_set_inactive_connect(touch_pad_conn_type_t type);
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/**
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* @brief Set connection type of touch channel in idle status.
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* When a channel is in measurement mode, other initialized channels are in idle mode.
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* The touch channel is generally adjacent to the trace, so the connection state of the idle channel
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* affects the stability and sensitivity of the test channel.
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* The `CONN_HIGHZ`(high resistance) setting increases the sensitivity of touch channels.
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* The `CONN_GND`(grounding) setting increases the stability of touch channels.
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* @param type Pointer to connection type.
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* @return
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* - ESP_OK on success
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*/
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esp_err_t touch_pad_get_inactive_connect(touch_pad_conn_type_t *type);
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/**
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* @brief Set the trigger threshold of touch sensor.
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* The threshold determines the sensitivity of the touch sensor.
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* The threshold is the original value of the trigger state minus the baseline value.
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* @note If set "TOUCH_PAD_THRESHOLD_MAX", the touch is never be trigered.
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* @param touch_num touch pad index
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* @param threshold threshold of touch sensor. Should be less than the max change value of touch.
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* @return
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* - ESP_OK on success
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*/
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esp_err_t touch_pad_set_thresh(touch_pad_t touch_num, uint32_t threshold);
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/**
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* @brief Get touch sensor trigger threshold
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* @param touch_num touch pad index
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* @param threshold pointer to accept threshold
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* @return
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* - ESP_OK on success
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* - ESP_ERR_INVALID_ARG if argument is wrong
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*/
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esp_err_t touch_pad_get_thresh(touch_pad_t touch_num, uint32_t *threshold);
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/**
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* @brief Register touch channel into touch sensor scan group.
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* The working mode of the touch sensor is cyclically scanned.
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* This function will set the scan bits according to the given bitmask.
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* @note If set this mask, the FSM timer should be stop firsty.
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* @note The touch sensor that in scan map, should be deinit GPIO function firstly by `touch_pad_io_init`.
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* @param enable_mask bitmask of touch sensor scan group.
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* e.g. TOUCH_PAD_NUM14 -> BIT(14)
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* @return
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* - ESP_OK on success
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*/
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esp_err_t touch_pad_set_channel_mask(uint16_t enable_mask);
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/**
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* @brief Get the touch sensor scan group bit mask.
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* @param enable_mask Pointer to bitmask of touch sensor scan group.
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* e.g. TOUCH_PAD_NUM14 -> BIT(14)
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* @return
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* - ESP_OK on success
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*/
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esp_err_t touch_pad_get_channel_mask(uint16_t *enable_mask);
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/**
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* @brief Clear touch channel from touch sensor scan group.
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* The working mode of the touch sensor is cyclically scanned.
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* This function will clear the scan bits according to the given bitmask.
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* @note If clear all mask, the FSM timer should be stop firsty.
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* @param enable_mask bitmask of touch sensor scan group.
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* e.g. TOUCH_PAD_NUM14 -> BIT(14)
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* @return
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* - ESP_OK on success
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*/
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esp_err_t touch_pad_clear_channel_mask(uint16_t enable_mask);
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/**
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* @brief Configure parameter for each touch channel.
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* @note Touch num 0 is denoise channel, please use `touch_pad_denoise_enable` to set denoise function
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* @param touch_num touch pad index
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG if argument wrong
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* - ESP_FAIL if touch pad not initialized
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*/
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esp_err_t touch_pad_config(touch_pad_t touch_num);
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/**
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* @brief Reset the whole of touch module.
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* @note Call this funtion after `touch_pad_fsm_stop`,
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_reset(void);
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/**
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* @brief Check touch sensor measurement status.
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* If doing measurement, the flag will be clear.
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* If finish measurement. the flag will be set.
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* @return
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* - TRUE finish measurement
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* - FALSE doing measurement
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*/
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bool touch_pad_meas_is_done(void);
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/**
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* @brief Get the current measure channel.
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* Touch sensor measurement is cyclic scan mode.
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* @return
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* - touch channel number
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*/
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touch_pad_t touch_pad_get_current_meas_channel(void);
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/**
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* @brief Get the touch sensor interrupt status mask.
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* @return
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* - touch intrrupt bit
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*/
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uint32_t touch_pad_read_intr_status_mask(void);
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/**
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* @brief Enable touch sensor interrupt by bitmask.
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* @param type interrupt type
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* @return
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* - ESP_OK on success
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*/
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esp_err_t touch_pad_intr_enable(touch_pad_intr_mask_t int_mask);
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/**
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* @brief Disable touch sensor interrupt by bitmask.
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* @param type interrupt type
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* @return
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* - ESP_OK on success
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*/
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esp_err_t touch_pad_intr_disable(touch_pad_intr_mask_t int_mask);
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/**
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* @brief Register touch-pad ISR.
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* The handler will be attached to the same CPU core that this function is running on.
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* @param fn Pointer to ISR handler
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* @param arg Parameter for ISR
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* @return
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* - ESP_OK Success ;
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* - ESP_ERR_INVALID_ARG GPIO error
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* - ESP_ERR_NO_MEM No memory
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*/
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esp_err_t touch_pad_isr_register(intr_handler_t fn, void* arg, touch_pad_intr_mask_t intr_mask);
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/**
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* @brief get raw data of touch sensor.
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* @note After the initialization is complete, the "raw_data" is max value. You need to wait for a measurement
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* cycle before you can read the correct touch value.
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* @param touch_num touch pad index
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* @param raw_data pointer to accept touch sensor value
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* @return
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* - ESP_OK Success
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* - ESP_FAIL Touch channel 0 havent this parameter.
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*/
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esp_err_t touch_pad_read_raw_data(touch_pad_t touch_num, uint32_t *raw_data);
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/**
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* @brief get baseline of touch sensor.
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* @note After initialization, the baseline value is the maximum during the first measurement period.
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* @param touch_num touch pad index
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* @param touch_value pointer to accept touch sensor value
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG Touch channel 0 havent this parameter.
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*/
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esp_err_t touch_pad_filter_read_baseline(touch_pad_t touch_num, uint32_t *basedata);
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/**
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* @brief Force reset baseline to raw data of touch sensor.
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* @param touch_num touch pad index
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* - TOUCH_PAD_MAX Reset basaline of all channels
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_filter_reset_baseline(touch_pad_t touch_num);
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/**
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* @brief set parameter of touch sensor filter and detection algorithm.
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* For more details on the detection algorithm, please refer to the application documentation.
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* @param filter_info select filter type and threshold of detection algorithm
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_filter_set_config(touch_filter_config_t *filter_info);
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/**
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* @brief get parameter of touch sensor filter and detection algorithm.
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* For more details on the detection algorithm, please refer to the application documentation.
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* @param filter_info select filter type and threshold of detection algorithm
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_filter_get_config(touch_filter_config_t *filter_info);
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/**
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* @brief enable touch sensor filter for detection algorithm.
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* For more details on the detection algorithm, please refer to the application documentation.
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_filter_enable(void);
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/**
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* @brief diaable touch sensor filter for detection algorithm.
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* For more details on the detection algorithm, please refer to the application documentation.
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_filter_disable(void);
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/**
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* @brief set parameter of denoise pad (TOUCH_PAD_NUM0).
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* T0 is an internal channel that does not have a corresponding external GPIO.
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* T0 will work simultaneously with the measured channel Tn. Finally, the actual
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* measured value of Tn is the value after subtracting lower bits of T0.
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* This denoise function filters out interference introduced on all channels,
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* such as noise introduced by the power supply and external EMI.
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* @param denoise parameter of denoise
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_denoise_set_config(touch_pad_denoise_t *denoise);
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/**
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* @brief get parameter of denoise pad (TOUCH_PAD_NUM0).
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* @param denoise Pointer to parameter of denoise
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_denoise_get_config(touch_pad_denoise_t *denoise);
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/**
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* @brief enable denoise function.
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* T0 is an internal channel that does not have a corresponding external GPIO.
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* T0 will work simultaneously with the measured channel Tn. Finally, the actual
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* measured value of Tn is the value after subtracting lower bits of T0.
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* This denoise function filters out interference introduced on all channels,
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* such as noise introduced by the power supply and external EMI.
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_denoise_enable(void);
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/**
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* @brief disable denoise function.
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_denoise_disable(void);
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/**
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* @brief Get denoise measure value (TOUCH_PAD_NUM0).
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* @param denoise value of denoise
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_denoise_read_data(uint32_t *data);
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/**
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* @brief set parameter of waterproof function.
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* The waterproof function includes a shielded channel (TOUCH_PAD_NUM14) and a guard channel.
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* The shielded channel outputs the same signal as the channel being measured.
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* It is generally designed as a grid and is placed around the touch buttons.
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* The shielded channel does not follow the measurement signal of the protection channel.
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* So that the guard channel can detect a large area of water.
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* @param waterproof parameter of waterproof
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_waterproof_set_config(touch_pad_waterproof_t *waterproof);
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/**
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* @brief get parameter of waterproof function.
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* @param waterproof parameter of waterproof
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_waterproof_get_config(touch_pad_waterproof_t *waterproof);
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/**
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* @brief Enable parameter of waterproof function.
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* The waterproof function includes a shielded channel (TOUCH_PAD_NUM14) and a guard channel.
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* The shielded channel outputs the same signal as the channel being measured.
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* It is generally designed as a grid and is placed around the touch buttons.
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* The shielded channel does not follow the measurement signal of the protection channel.
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* So that the guard channel can detect a large area of water.
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_waterproof_enable(void);
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/**
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* @brief Enable parameter of waterproof function.
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* The waterproof function includes a shielded channel (TOUCH_PAD_NUM14) and a guard channel.
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* The shielded channel outputs the same signal as the channel being measured.
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* It is generally designed as a grid and is placed around the touch buttons.
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* The shielded channel does not follow the measurement signal of the protection channel.
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* So that the guard channel can detect a large area of water.
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_waterproof_disable(void);
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/**
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* @brief Set parameter of proximity channel. Three proximity sensing channels can be set.
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* The proximity sensor measurement is the accumulation of touch channel measurements.
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* @note If stop the proximity function for the channel, point this proximity channel to `TOUCH_PAD_NUM0`.
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* @param proximity parameter of proximity
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_proximity_set_config(touch_pad_proximity_t *proximity);
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/**
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* @brief Get parameter of proximity channel. Three proximity sensing channels can be set.
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* The proximity sensor measurement is the accumulation of touch channel measurements.
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* @param proximity parameter of proximity
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_proximity_get_config(touch_pad_proximity_t *proximity);
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/**
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* @brief Get measure count of proximity channel.
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* The proximity sensor measurement is the accumulation of touch channel measurements.
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* @param touch_num touch pad index
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* @param proximity parameter of proximity
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG parameter is NULL
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*/
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esp_err_t touch_pad_proximity_read_meas_cnt(touch_pad_t touch_num, uint32_t *cnt);
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/**
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* @brief Get the accumulated measurement of the proximity sensor.
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* The proximity sensor measurement is the accumulation of touch channel measurements.
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* @param touch_num touch pad index
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* @param measure_out If the accumulation process does not end, the `measure_out` is the process value.
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_proximity_data_get(touch_pad_t touch_num, uint32_t *measure_out);
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/**
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* @brief Set parameter of touch sensor in sleep mode.
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* In order to achieve low power consumption in sleep mode, other circuits except the RTC part of the register are in a power-off state.
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* Only one touch channel is supported in the sleep state, which can be used as a wake-up function.
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* If in non-sleep mode, the sleep parameters do not work.
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* @param slp_config touch pad config
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* @return
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* - ESP_OK Success
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*/
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esp_err_t touch_pad_sleep_channel_config(touch_pad_sleep_channel_t *slp_config);
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/**
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* @brief Read baseline of touch sensor in sleep mode.
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* @param baseline pointer to accept touch sensor baseline value
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG parameter is NULL
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*/
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esp_err_t touch_pad_sleep_channel_read_baseline(uint32_t *baseline);
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/**
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* @brief Read debounce of touch sensor in sleep mode.
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* @param debounce pointer to accept touch sensor debounce value
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG parameter is NULL
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*/
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esp_err_t touch_pad_sleep_channel_read_debounce(uint32_t *debounce);
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/**
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* @brief Read proximity count of touch sensor in sleep mode.
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* @param proximity_cnt pointer to accept touch sensor proximity count value
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* @return
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* - ESP_OK Success
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* - ESP_ERR_INVALID_ARG parameter is NULL
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*/
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esp_err_t touch_pad_sleep_channel_read_proximity_cnt(uint32_t *proximity_cnt);
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#ifdef __cplusplus
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}
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#endif |