mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
467 lines
17 KiB
C
467 lines
17 KiB
C
// Copyright 2019 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.
|
|
|
|
#pragma once
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* @brief Set touch sensor FSM start
|
|
* @note Start FSM after the touch sensor FSM mode is set.
|
|
* @note Call this function will reset beseline of all touch channels.
|
|
* @return
|
|
* - ESP_OK on success
|
|
*/
|
|
esp_err_t touch_pad_fsm_start(void);
|
|
|
|
/**
|
|
* @brief Stop touch sensor FSM.
|
|
* @return
|
|
* - ESP_OK on success
|
|
*/
|
|
esp_err_t touch_pad_fsm_stop(void);
|
|
|
|
/**
|
|
* @brief Trigger a touch sensor measurement, only support in SW mode of FSM
|
|
* @return
|
|
* - ESP_OK on success
|
|
*/
|
|
esp_err_t touch_pad_sw_start(void);
|
|
|
|
/**
|
|
* @brief Set touch sensor times of charge and discharge and sleep time.
|
|
* Excessive total time will slow down the touch response.
|
|
* Too small measurement time will not be sampled enough, resulting in inaccurate measurements.
|
|
*
|
|
* @note The greater the duty cycle of the measurement time, the more system power is consumed.
|
|
* @param sleep_cycle The touch sensor will sleep after each measurement.
|
|
* sleep_cycle decide the interval between each measurement.
|
|
* t_sleep = sleep_cycle / (RTC_SLOW_CLK frequency).
|
|
* The approximate frequency value of RTC_SLOW_CLK can be obtained using rtc_clk_slow_freq_get_hz function.
|
|
* @param meas_time The time of charge and discharge in each measure process of touch channels.
|
|
* The timer frequency is 8Mhz. Range: 0 ~ 0xffff.
|
|
* Recommended typical value: Modify this value to make the measurement time around 1ms.
|
|
* @return
|
|
* - ESP_OK on success
|
|
*/
|
|
esp_err_t touch_pad_set_meas_time(uint16_t sleep_cycle, uint16_t meas_time);
|
|
|
|
/**
|
|
* @brief Get touch sensor times of charge and discharge and sleep time
|
|
* @param sleep_cycle Pointer to accept sleep cycle number
|
|
* @param meas_time Pointer to accept measurement time count.
|
|
* @return
|
|
* - ESP_OK on success
|
|
*/
|
|
esp_err_t touch_pad_get_meas_time(uint16_t *sleep_cycle, uint16_t *meas_time);
|
|
|
|
/**
|
|
* @brief Set connection type of touch channel in idle status.
|
|
* When a channel is in measurement mode, other initialized channels are in idle mode.
|
|
* The touch channel is generally adjacent to the trace, so the connection state of the idle channel
|
|
* affects the stability and sensitivity of the test channel.
|
|
* The `CONN_HIGHZ`(high resistance) setting increases the sensitivity of touch channels.
|
|
* The `CONN_GND`(grounding) setting increases the stability of touch channels.
|
|
* @param type Select idle channel connect to high resistance state or ground.
|
|
* @return
|
|
* - ESP_OK on success
|
|
*/
|
|
esp_err_t touch_pad_set_inactive_connect(touch_pad_conn_type_t type);
|
|
|
|
/**
|
|
* @brief Set connection type of touch channel in idle status.
|
|
* When a channel is in measurement mode, other initialized channels are in idle mode.
|
|
* The touch channel is generally adjacent to the trace, so the connection state of the idle channel
|
|
* affects the stability and sensitivity of the test channel.
|
|
* The `CONN_HIGHZ`(high resistance) setting increases the sensitivity of touch channels.
|
|
* The `CONN_GND`(grounding) setting increases the stability of touch channels.
|
|
* @param type Pointer to connection type.
|
|
* @return
|
|
* - ESP_OK on success
|
|
*/
|
|
esp_err_t touch_pad_get_inactive_connect(touch_pad_conn_type_t *type);
|
|
|
|
/**
|
|
* @brief Set the trigger threshold of touch sensor.
|
|
* The threshold determines the sensitivity of the touch sensor.
|
|
* The threshold is the original value of the trigger state minus the baseline value.
|
|
* @note If set "TOUCH_PAD_THRESHOLD_MAX", the touch is never be trigered.
|
|
* @param touch_num touch pad index
|
|
* @param threshold threshold of touch sensor. Should be less than the max change value of touch.
|
|
* @return
|
|
* - ESP_OK on success
|
|
*/
|
|
esp_err_t touch_pad_set_thresh(touch_pad_t touch_num, uint32_t threshold);
|
|
|
|
/**
|
|
* @brief Get touch sensor trigger threshold
|
|
* @param touch_num touch pad index
|
|
* @param threshold pointer to accept threshold
|
|
* @return
|
|
* - ESP_OK on success
|
|
* - ESP_ERR_INVALID_ARG if argument is wrong
|
|
*/
|
|
esp_err_t touch_pad_get_thresh(touch_pad_t touch_num, uint32_t *threshold);
|
|
|
|
/**
|
|
* @brief Register touch channel into touch sensor scan group.
|
|
* The working mode of the touch sensor is cyclically scanned.
|
|
* This function will set the scan bits according to the given bitmask.
|
|
* @note If set this mask, the FSM timer should be stop firsty.
|
|
* @note The touch sensor that in scan map, should be deinit GPIO function firstly by `touch_pad_io_init`.
|
|
* @param enable_mask bitmask of touch sensor scan group.
|
|
* e.g. TOUCH_PAD_NUM14 -> BIT(14)
|
|
* @return
|
|
* - ESP_OK on success
|
|
*/
|
|
esp_err_t touch_pad_set_channel_mask(uint16_t enable_mask);
|
|
|
|
/**
|
|
* @brief Get the touch sensor scan group bit mask.
|
|
* @param enable_mask Pointer to bitmask of touch sensor scan group.
|
|
* e.g. TOUCH_PAD_NUM14 -> BIT(14)
|
|
* @return
|
|
* - ESP_OK on success
|
|
*/
|
|
esp_err_t touch_pad_get_channel_mask(uint16_t *enable_mask);
|
|
|
|
/**
|
|
* @brief Clear touch channel from touch sensor scan group.
|
|
* The working mode of the touch sensor is cyclically scanned.
|
|
* This function will clear the scan bits according to the given bitmask.
|
|
* @note If clear all mask, the FSM timer should be stop firsty.
|
|
* @param enable_mask bitmask of touch sensor scan group.
|
|
* e.g. TOUCH_PAD_NUM14 -> BIT(14)
|
|
* @return
|
|
* - ESP_OK on success
|
|
*/
|
|
esp_err_t touch_pad_clear_channel_mask(uint16_t enable_mask);
|
|
|
|
/**
|
|
* @brief Configure parameter for each touch channel.
|
|
* @note Touch num 0 is denoise channel, please use `touch_pad_denoise_enable` to set denoise function
|
|
* @param touch_num touch pad index
|
|
* @return
|
|
* - ESP_OK Success
|
|
* - ESP_ERR_INVALID_ARG if argument wrong
|
|
* - ESP_FAIL if touch pad not initialized
|
|
*/
|
|
esp_err_t touch_pad_config(touch_pad_t touch_num);
|
|
|
|
/**
|
|
* @brief Reset the whole of touch module.
|
|
* @note Call this funtion after `touch_pad_fsm_stop`,
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_reset(void);
|
|
|
|
/**
|
|
* @brief Check touch sensor measurement status.
|
|
* If doing measurement, the flag will be clear.
|
|
* If finish measurement. the flag will be set.
|
|
* @return
|
|
* - TRUE finish measurement
|
|
* - FALSE doing measurement
|
|
*/
|
|
bool touch_pad_meas_is_done(void);
|
|
|
|
/**
|
|
* @brief Get the current measure channel.
|
|
* Touch sensor measurement is cyclic scan mode.
|
|
* @return
|
|
* - touch channel number
|
|
*/
|
|
touch_pad_t touch_pad_get_current_meas_channel(void);
|
|
|
|
/**
|
|
* @brief Get the touch sensor interrupt status mask.
|
|
* @return
|
|
* - touch intrrupt bit
|
|
*/
|
|
uint32_t touch_pad_read_intr_status_mask(void);
|
|
|
|
/**
|
|
* @brief Enable touch sensor interrupt by bitmask.
|
|
* @param int_mask Pad mask to enable interrupts
|
|
* @return
|
|
* - ESP_OK on success
|
|
*/
|
|
esp_err_t touch_pad_intr_enable(touch_pad_intr_mask_t int_mask);
|
|
|
|
/**
|
|
* @brief Disable touch sensor interrupt by bitmask.
|
|
* @param int_mask Pad mask to disable interrupts
|
|
* @return
|
|
* - ESP_OK on success
|
|
*/
|
|
esp_err_t touch_pad_intr_disable(touch_pad_intr_mask_t int_mask);
|
|
|
|
/**
|
|
* @brief Register touch-pad ISR.
|
|
* The handler will be attached to the same CPU core that this function is running on.
|
|
* @param fn Pointer to ISR handler
|
|
* @param arg Parameter for ISR
|
|
* @param int_mask Initial pad mask to enable interrupt for
|
|
* @return
|
|
* - ESP_OK Success ;
|
|
* - ESP_ERR_INVALID_ARG GPIO error
|
|
* - ESP_ERR_NO_MEM No memory
|
|
*/
|
|
esp_err_t touch_pad_isr_register(intr_handler_t fn, void* arg, touch_pad_intr_mask_t int_mask);
|
|
|
|
/**
|
|
* @brief get raw data of touch sensor.
|
|
* @note After the initialization is complete, the "raw_data" is max value. You need to wait for a measurement
|
|
* cycle before you can read the correct touch value.
|
|
* @param touch_num touch pad index
|
|
* @param raw_data pointer to accept touch sensor value
|
|
* @return
|
|
* - ESP_OK Success
|
|
* - ESP_FAIL Touch channel 0 havent this parameter.
|
|
*/
|
|
|
|
esp_err_t touch_pad_read_raw_data(touch_pad_t touch_num, uint32_t *raw_data);
|
|
|
|
/**
|
|
* @brief get baseline of touch sensor.
|
|
* @note After initialization, the baseline value is the maximum during the first measurement period.
|
|
* @param touch_num touch pad index
|
|
* @param basedata pointer to accept touch sensor baseline value
|
|
* @return
|
|
* - ESP_OK Success
|
|
* - ESP_ERR_INVALID_ARG Touch channel 0 havent this parameter.
|
|
*/
|
|
esp_err_t touch_pad_filter_read_baseline(touch_pad_t touch_num, uint32_t *basedata);
|
|
|
|
/**
|
|
* @brief Force reset baseline to raw data of touch sensor.
|
|
* @param touch_num touch pad index
|
|
* - TOUCH_PAD_MAX Reset basaline of all channels
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_filter_reset_baseline(touch_pad_t touch_num);
|
|
|
|
/**
|
|
* @brief set parameter of touch sensor filter and detection algorithm.
|
|
* For more details on the detection algorithm, please refer to the application documentation.
|
|
* @param filter_info select filter type and threshold of detection algorithm
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_filter_set_config(touch_filter_config_t *filter_info);
|
|
|
|
/**
|
|
* @brief get parameter of touch sensor filter and detection algorithm.
|
|
* For more details on the detection algorithm, please refer to the application documentation.
|
|
* @param filter_info select filter type and threshold of detection algorithm
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_filter_get_config(touch_filter_config_t *filter_info);
|
|
|
|
/**
|
|
* @brief enable touch sensor filter for detection algorithm.
|
|
* For more details on the detection algorithm, please refer to the application documentation.
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_filter_enable(void);
|
|
|
|
/**
|
|
* @brief diaable touch sensor filter for detection algorithm.
|
|
* For more details on the detection algorithm, please refer to the application documentation.
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_filter_disable(void);
|
|
|
|
/**
|
|
* @brief set parameter of denoise pad (TOUCH_PAD_NUM0).
|
|
* T0 is an internal channel that does not have a corresponding external GPIO.
|
|
* T0 will work simultaneously with the measured channel Tn. Finally, the actual
|
|
* measured value of Tn is the value after subtracting lower bits of T0.
|
|
* This denoise function filters out interference introduced on all channels,
|
|
* such as noise introduced by the power supply and external EMI.
|
|
* @param denoise parameter of denoise
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_denoise_set_config(touch_pad_denoise_t *denoise);
|
|
|
|
/**
|
|
* @brief get parameter of denoise pad (TOUCH_PAD_NUM0).
|
|
* @param denoise Pointer to parameter of denoise
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_denoise_get_config(touch_pad_denoise_t *denoise);
|
|
|
|
/**
|
|
* @brief enable denoise function.
|
|
* T0 is an internal channel that does not have a corresponding external GPIO.
|
|
* T0 will work simultaneously with the measured channel Tn. Finally, the actual
|
|
* measured value of Tn is the value after subtracting lower bits of T0.
|
|
* This denoise function filters out interference introduced on all channels,
|
|
* such as noise introduced by the power supply and external EMI.
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_denoise_enable(void);
|
|
|
|
/**
|
|
* @brief disable denoise function.
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_denoise_disable(void);
|
|
|
|
/**
|
|
* @brief Get denoise measure value (TOUCH_PAD_NUM0).
|
|
* @param data Pointer to receive denoise value
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_denoise_read_data(uint32_t *data);
|
|
|
|
/**
|
|
* @brief set parameter of waterproof function.
|
|
* The waterproof function includes a shielded channel (TOUCH_PAD_NUM14) and a guard channel.
|
|
* The shielded channel outputs the same signal as the channel being measured.
|
|
* It is generally designed as a grid and is placed around the touch buttons.
|
|
* The shielded channel does not follow the measurement signal of the protection channel.
|
|
* So that the guard channel can detect a large area of water.
|
|
* @param waterproof parameter of waterproof
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_waterproof_set_config(touch_pad_waterproof_t *waterproof);
|
|
|
|
/**
|
|
* @brief get parameter of waterproof function.
|
|
* @param waterproof parameter of waterproof
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_waterproof_get_config(touch_pad_waterproof_t *waterproof);
|
|
|
|
/**
|
|
* @brief Enable parameter of waterproof function.
|
|
* The waterproof function includes a shielded channel (TOUCH_PAD_NUM14) and a guard channel.
|
|
* The shielded channel outputs the same signal as the channel being measured.
|
|
* It is generally designed as a grid and is placed around the touch buttons.
|
|
* The shielded channel does not follow the measurement signal of the protection channel.
|
|
* So that the guard channel can detect a large area of water.
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_waterproof_enable(void);
|
|
|
|
/**
|
|
* @brief Enable parameter of waterproof function.
|
|
* The waterproof function includes a shielded channel (TOUCH_PAD_NUM14) and a guard channel.
|
|
* The shielded channel outputs the same signal as the channel being measured.
|
|
* It is generally designed as a grid and is placed around the touch buttons.
|
|
* The shielded channel does not follow the measurement signal of the protection channel.
|
|
* So that the guard channel can detect a large area of water.
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_waterproof_disable(void);
|
|
|
|
/**
|
|
* @brief Set parameter of proximity channel. Three proximity sensing channels can be set.
|
|
* The proximity sensor measurement is the accumulation of touch channel measurements.
|
|
* @note If stop the proximity function for the channel, point this proximity channel to `TOUCH_PAD_NUM0`.
|
|
* @param proximity parameter of proximity
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_proximity_set_config(touch_pad_proximity_t *proximity);
|
|
|
|
/**
|
|
* @brief Get parameter of proximity channel. Three proximity sensing channels can be set.
|
|
* The proximity sensor measurement is the accumulation of touch channel measurements.
|
|
* @param proximity parameter of proximity
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_proximity_get_config(touch_pad_proximity_t *proximity);
|
|
|
|
/**
|
|
* @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);
|
|
|
|
/**
|
|
* @brief Get the accumulated measurement of the proximity sensor.
|
|
* The proximity sensor measurement is the accumulation of touch channel measurements.
|
|
* @param touch_num touch pad index
|
|
* @param measure_out If the accumulation process does not end, the `measure_out` is the process value.
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_proximity_data_get(touch_pad_t touch_num, uint32_t *measure_out);
|
|
|
|
/**
|
|
* @brief Set parameter of touch sensor in sleep mode.
|
|
* 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.
|
|
* Only one touch channel is supported in the sleep state, which can be used as a wake-up function.
|
|
* If in non-sleep mode, the sleep parameters do not work.
|
|
* @param slp_config touch pad config
|
|
* @return
|
|
* - ESP_OK Success
|
|
*/
|
|
esp_err_t touch_pad_sleep_channel_config(touch_pad_sleep_channel_t *slp_config);
|
|
|
|
/**
|
|
* @brief Read baseline of touch sensor in sleep mode.
|
|
* @param baseline pointer to accept touch sensor baseline value
|
|
* @return
|
|
* - ESP_OK Success
|
|
* - ESP_ERR_INVALID_ARG parameter is NULL
|
|
*/
|
|
esp_err_t touch_pad_sleep_channel_read_baseline(uint32_t *baseline);
|
|
|
|
/**
|
|
* @brief Read debounce of touch sensor in sleep mode.
|
|
* @param debounce pointer to accept touch sensor debounce value
|
|
* @return
|
|
* - ESP_OK Success
|
|
* - ESP_ERR_INVALID_ARG parameter is NULL
|
|
*/
|
|
esp_err_t touch_pad_sleep_channel_read_debounce(uint32_t *debounce);
|
|
|
|
/**
|
|
* @brief Read proximity count of touch sensor in sleep mode.
|
|
* @param proximity_cnt pointer to accept touch sensor proximity count value
|
|
* @return
|
|
* - ESP_OK Success
|
|
* - ESP_ERR_INVALID_ARG parameter is NULL
|
|
*/
|
|
esp_err_t touch_pad_sleep_channel_read_proximity_cnt(uint32_t *proximity_cnt);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|