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https://github.com/espressif/esp-idf.git
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295 lines
15 KiB
C
295 lines
15 KiB
C
/*
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* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include "esp_err.h"
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#include "driver/touch_sens_types.h"
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#include "driver/touch_version_types.h"
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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 Allocate a new touch sensor controller
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* @note The touch sensor driver will be in INIT state after this function is called successfully.
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*
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* @param[in] sens_cfg Touch sensor controller configurations
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* @param[out] ret_sens_handle The return handle of the touch controller instance
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* @return
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* - ESP_OK On success
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* - ESP_ERR_NO_MEM No memory for the touch sensor controller
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* - ESP_ERR_INVALID_ARG Invalid argument or NULL pointer
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* - ESP_ERR_INVALID_STATE The touch sensor controller is already allocated
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*/
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esp_err_t touch_sensor_new_controller(const touch_sensor_config_t *sens_cfg, touch_sensor_handle_t *ret_sens_handle);
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/**
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* @brief Delete the touch sensor controller
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* @note This function can be called when the touch sensor controller is NOT enabled (i.e. INIT state).
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*
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* @param[in] sens_handle Touch sensor controller handle
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* @return
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* - ESP_OK On success
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* - ESP_ERR_INVALID_ARG Invalid argument or NULL pointer
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* - ESP_ERR_INVALID_STATE Controller not disabled or still some touch channels not deleted
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*/
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esp_err_t touch_sensor_del_controller(touch_sensor_handle_t sens_handle);
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/**
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* @brief Allocate a new touch channel from the touch sensor controller
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* @note This function can be called when the touch sensor controller is NOT enabled (i.e. INIT state).
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*
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* @param[in] sens_handle Touch sensor controller handle
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* @param[in] chan_id Touch channel index
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* @param[in] chan_cfg Touch channel configurations
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* @param[out] ret_chan_handle The return handle of the touch channel instance
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* @return
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* - ESP_OK On success
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* - ESP_ERR_NO_MEM No memory for the touch sensor channel
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* - ESP_ERR_INVALID_ARG Invalid argument or NULL pointer
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* - ESP_ERR_INVALID_STATE The touch sensor controller has not disabled or this channel has been allocated
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*/
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esp_err_t touch_sensor_new_channel(touch_sensor_handle_t sens_handle, int chan_id,
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const touch_channel_config_t *chan_cfg,
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touch_channel_handle_t *ret_chan_handle);
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/**
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* @brief Delete the touch channel
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* @note This function can be called when the touch sensor controller is NOT enabled (i.e. INIT state).
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*
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* @param[in] chan_handle Touch channel handle
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* @return
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* - ESP_OK On success
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* - ESP_ERR_INVALID_ARG Invalid argument or NULL pointer
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* - ESP_ERR_INVALID_STATE The touch sensor controller has not disabled
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*/
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esp_err_t touch_sensor_del_channel(touch_channel_handle_t chan_handle);
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/**
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* @brief Re-configure the touch sensor controller
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* @note This function can be called when the touch sensor controller is NOT enabled (i.e. INIT state).
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* @note The re-configuration only applies to the touch controller,
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* so it requires the controller handle that allocated from ``touch_sensor_new_controller``,
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* meanwhile, it won't affect the touch channels, no matter the channels are allocated or not.
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*
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* @param[in] sens_handle Touch sensor controller handle
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* @param[in] sens_cfg Touch sensor controller configurations
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* @return
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* - ESP_OK On success
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* - ESP_ERR_INVALID_ARG Invalid argument or NULL pointer
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* - ESP_ERR_INVALID_STATE The touch sensor controller has not disabled
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*/
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esp_err_t touch_sensor_reconfig_controller(touch_sensor_handle_t sens_handle, const touch_sensor_config_t *sens_cfg);
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/**
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* @brief Re-configure the touch channel
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* @note This function can be called when the touch sensor controller is NOT enabled (i.e. INIT state).
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* @note The re-configuration only applies to a particular touch channel,
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* so it requires the channel handle that allocated from ``touch_sensor_new_channel``
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*
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* @param[in] chan_handle Touch channel handle
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* @param[in] chan_cfg Touch channel configurations
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* @return
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* - ESP_OK On success
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* - ESP_ERR_INVALID_ARG Invalid argument or NULL pointer
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* - ESP_ERR_INVALID_STATE The touch sensor controller has not disabled
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*/
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esp_err_t touch_sensor_reconfig_channel(touch_channel_handle_t chan_handle, const touch_channel_config_t *chan_cfg);
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/**
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* @brief Configure the touch sensor filter
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* @note This function is allowed to be called after the touch sensor is enabled
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*
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* @param[in] sens_handle Touch sensor controller handle
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* @param[in] filter_cfg Filter configurations, set NULL to disable the filter
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* @return
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* - ESP_OK: Configure the filter success
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* - ESP_ERR_INVALID_ARG: The sensor handle is NULL
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*/
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esp_err_t touch_sensor_config_filter(touch_sensor_handle_t sens_handle, const touch_sensor_filter_config_t *filter_cfg);
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/**
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* @brief Enable the touch sensor controller
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* @note This function can be called when the touch sensor controller is NOT enabled (i.e. INIT state).
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* And the touch sensor driver will be in ENABLED state after this function is called successfully.
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* @note Enable the touch sensor will power on the registered touch channels
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*
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* @param[in] sens_handle Touch sensor controller handle
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* @return
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* - ESP_OK On success
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* - ESP_ERR_INVALID_ARG Invalid argument or NULL pointer
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* - ESP_ERR_INVALID_STATE The touch sensor controller has already enabled
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*/
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esp_err_t touch_sensor_enable(touch_sensor_handle_t sens_handle);
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/**
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* @brief Disable the touch sensor controller
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* @note This function can only be called after the touch sensor controller is enabled (i.e. ENABLED state).
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* And the touch sensor driver will be in INIT state after this function is called successfully.
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* @note Disable the touch sensor will power off the registered touch channels
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*
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* @param[in] sens_handle Touch sensor controller handle
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* @return
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* - ESP_OK On success
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* - ESP_ERR_INVALID_ARG Invalid argument or NULL pointer
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* - ESP_ERR_INVALID_STATE The touch sensor controller has already disabled
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*/
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esp_err_t touch_sensor_disable(touch_sensor_handle_t sens_handle);
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/**
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* @brief Start the scanning of the registered touch channels continuously
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* @note This function can only be called after the touch sensor controller is enabled (i.e. ENABLED state).
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* And the touch sensor driver will be in SCANNING state after this function is called successfully.
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* And it can also be called in ISR/callback context.
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* @note The hardware FSM (Finite-State Machine) of touch sensor will be driven by
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* its hardware timer continuously and repeatedly.
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* i.e., the registered channels will be scanned one by one repeatedly.
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*
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* @param[in] sens_handle Touch sensor controller handle
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* @return
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* - ESP_OK On success
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* - ESP_ERR_INVALID_ARG Invalid argument or NULL pointer
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* - ESP_ERR_INVALID_STATE The touch sensor controller is not enabled or the continuous scanning has started
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*/
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esp_err_t touch_sensor_start_continuous_scanning(touch_sensor_handle_t sens_handle);
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/**
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* @brief Stop the continuous scanning of the registered touch channels immediately
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* @note This function can only be called after the continuous scanning started (i.e. SCANNING state).
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* And the touch sensor driver will be in ENABLED state after this function is called successfully.
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* And it can also be called in ISR/callback context.
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* @note Stop the hardware timer and reset the FSM (Finite-State Machine) of the touch sensor controller
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*
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* @param[in] sens_handle Touch sensor controller handle
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* @return
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* - ESP_OK On success
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* - ESP_ERR_INVALID_ARG Invalid argument or NULL pointer
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* - ESP_ERR_INVALID_STATE The continuous scanning has stopped
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*/
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esp_err_t touch_sensor_stop_continuous_scanning(touch_sensor_handle_t sens_handle);
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/**
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* @brief Trigger an oneshot scanning for all the registered channels
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* @note This function can only be called after the touch sensor controller is enabled (i.e. ENABLED state).
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* And the touch sensor driver will be in SCANNING state after this function is called successfully,
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* and then switch back to ENABLED state after the scanning is done or timeout.
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* @note The block time of this function depends on various factors,
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* In common practice, recommend to set the timeout to several seconds or wait forever,
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* because oneshot scanning can't last for so long.
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*
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* @param[in] sens_handle Touch sensor controller handle
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* @param[in] timeout_ms Set a positive value or zero means scan timeout in milliseconds
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* Set a negative value means wait forever until finished scanning
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* @return
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* - ESP_OK On success
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* - ESP_ERR_TIMEOUT Timeout to finish the oneshot scanning
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* - ESP_ERR_INVALID_ARG Invalid argument
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* - ESP_ERR_INVALID_STATE The touch sensor controller is not enabled or the continuous scanning has started
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*/
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esp_err_t touch_sensor_trigger_oneshot_scanning(touch_sensor_handle_t sens_handle, int timeout_ms);
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/**
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* @brief Register the touch sensor callbacks
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* @note This function can be called when the touch sensor controller is NOT enabled (i.e. INIT state).
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*
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* @param[in] sens_handle Touch sensor controller handle
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* @param[in] callbacks Callback functions
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* @param[in] user_ctx User context that will be passed to the callback functions
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* @return
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* - ESP_OK On success
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* - ESP_ERR_INVALID_ARG NULL pointer
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* - ESP_ERR_INVALID_STATE Touch sensor controller has not disabled
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*/
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esp_err_t touch_sensor_register_callbacks(touch_sensor_handle_t sens_handle, const touch_event_callbacks_t *callbacks, void *user_ctx);
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/**
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* @brief Confiture the touch sensor benchmark for all the registered channels
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* @note This function can be called no matter the touch sensor controller is enabled or not (i.e. ENABLED or SCANNING state).
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* And it can also be called in ISR/callback context.
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*
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* @param[in] chan_handle Touch channel handle
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* @param[in] benchmark_cfg The benchmark configurations
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* @return
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* - ESP_OK On success
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* - ESP_ERR_INVALID_ARG NULL pointer
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*/
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esp_err_t touch_channel_config_benchmark(touch_channel_handle_t chan_handle, const touch_chan_benchmark_config_t *benchmark_cfg);
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/**
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* @brief Read the touch channel data according to the types
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* @note This function can be called no matter the touch sensor controller is enabled or not (i.e. ENABLED or SCANNING state).
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* And it can also be called in ISR/callback context.
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* @note Specially, `TOUCH_CHAN_DATA_TYPE_PROXIMITY` data type will be read from the cached data in the driver,
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* because the proximity data need to be accumulated in several scan times that specified by `touch_proximity_config_t::scan_times`.
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* For other data types, the data are read from the hardware registers directly (not cached in the driver).
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* The channel data in the register will be updated once the measurement of this channels is done,
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* And keep locked until the next measurement is done.
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*
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* @param[in] chan_handle Touch channel handle
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* @param[in] type Specify the data type to read
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* @param[out] data The data array pointer. If the target supports multiple sample configurations (SOC_TOUCH_SAMPLE_CFG_NUM), the array length should be equal to
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* the frequency hopping number that specified in `touch_sensor_config_t::sample_cfg_num`, otherwise the array length should be 1.
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* @return
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* - ESP_OK On success
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* - ESP_ERR_INVALID_ARG Invalid argument or NULL pointer
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*/
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esp_err_t touch_channel_read_data(touch_channel_handle_t chan_handle, touch_chan_data_type_t type, uint32_t *data);
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#if SOC_TOUCH_SUPPORT_WATERPROOF
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/**
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* @brief Configure the touch sensor water proof channels
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* @note Once waterproof is enabled, the other touch channels won't be updated unless the shield channels is activated.
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*
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* @param[in] sens_handle Touch sensor controller handle
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* @param[in] wp_cfg Water proof channel configurations, set NULL to disable the water proof function
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* @return
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* - ESP_OK: Configure the water proof success
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* - ESP_ERR_INVALID_ARG: The sensor handle is NULL
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* - ESP_ERR_INVALID_STATE: The touch sensor is enabled
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*/
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esp_err_t touch_sensor_config_waterproof(touch_sensor_handle_t sens_handle, const touch_waterproof_config_t *wp_cfg);
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#endif
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#if SOC_TOUCH_SUPPORT_PROX_SENSING
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/**
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* @brief Configure the touch sensor proximity sensing channels
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*
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* @param[in] sens_handle Touch sensor controller handle
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* @param[in] prox_cfg Proximity channels configurations, set NULL to disable the proximity sensing
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* @return
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* - ESP_OK: Configure the proximity channel success
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* - ESP_ERR_INVALID_ARG: The sensor handle is NULL
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* - ESP_ERR_INVALID_STATE: The touch sensor is enabled
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*/
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esp_err_t touch_sensor_config_proximity_sensing(touch_sensor_handle_t sens_handle, const touch_proximity_config_t *prox_cfg);
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#endif
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#if SOC_TOUCH_SUPPORT_SLEEP_WAKEUP
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/**
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* @brief Configure the touch sensor to wake-up the chip from sleep
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* @note Call this function to enable/disable the touch sensor wake-up the chip from deep/light sleep
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* To only enable the touch sensor wake-up the chip from light sleep, set the `touch_sleep_config_t::deep_slp_chan` to NULL.
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* During the light sleep, all enabled touch channels will keep working, and any one of them can wake-up the chip from light sleep.
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* To enable the touch sensor wake-up the chip from both light and deep sleep, set the `touch_sleep_config_t::deep_slp_chan` to an enabled channel.
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* During the deep sleep, only this specified channels can work and wake-up the chip from the deep sleep,
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* and other enabled channels can only wake-up the chip from light sleep.
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*
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* @param[in] sens_handle Touch sensor controller handle
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* @param[in] sleep_cfg Sleep wake-up configurations, set NULL to disable the touch sensor wake-up the chip from sleep
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* @return
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* - ESP_OK: Configure the sleep channel success
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* - ESP_ERR_INVALID_ARG: The sensor handle is NULL
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* - ESP_ERR_INVALID_STATE: The touch sensor is enabled
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*/
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esp_err_t touch_sensor_config_sleep_wakeup(touch_sensor_handle_t sens_handle, const touch_sleep_config_t *sleep_cfg);
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#endif
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#ifdef __cplusplus
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}
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#endif
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