chaijie
a48b5246cc
ESP32 in revision0 and revision1 uses touchpad to provide current to oscillate xtal 32k. But revision2 and revision3 do not need to do that. Note: touchpad can not work and toupad/ULP wakeup sources are not available when toupad provides current to xtal 32k
509 lines
16 KiB
C
509 lines
16 KiB
C
// Copyright 2015-2019 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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//
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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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/*******************************************************************************
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* NOTICE
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* The ll is not public api, don't use in application code.
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* See readme.md in hal/include/hal/readme.md
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******************************************************************************/
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// The Lowlevel layer for Touch Sensor
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#pragma once
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#include <stdlib.h>
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#include <stdbool.h>
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#include "soc/touch_sensor_periph.h"
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#include "hal/touch_sensor_types.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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//Some register bits of touch sensor 8 and 9 are mismatched, we need to swap the bits.
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#define TOUCH_LL_BIT_SWAP(data, n, m) (((data >> n) & 0x1) == ((data >> m) & 0x1) ? (data) : ((data) ^ ((0x1 <<n) | (0x1 << m))))
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#define TOUCH_LL_BITS_SWAP(v) TOUCH_LL_BIT_SWAP(v, TOUCH_PAD_NUM8, TOUCH_PAD_NUM9)
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/**
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* Swap the number of touch8 and touch9.
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*
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* @touch_num Touch channel num.
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*/
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static inline touch_pad_t touch_ll_num_wrap(touch_pad_t touch_num)
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{
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if (touch_num == TOUCH_PAD_NUM8) {
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return TOUCH_PAD_NUM9;
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} else if (touch_num == TOUCH_PAD_NUM9) {
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return TOUCH_PAD_NUM8;
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}
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return touch_num;
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}
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/**
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* Set touch sensor measurement time.
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*
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* @param meas_time The duration of the touch sensor measurement.
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* t_meas = meas_time / (8MHz), the maximum measure time is 0xffff / 8M = 8.19 ms.
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*/
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static inline void touch_ll_set_meas_time(uint16_t meas_time)
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{
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//touch sensor measure time= meas_cycle / 8Mhz
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SENS.sar_touch_ctrl1.touch_meas_delay = meas_time;
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//the waiting cycles (in 8MHz) between TOUCH_START and TOUCH_XPD
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SENS.sar_touch_ctrl1.touch_xpd_wait = SOC_TOUCH_PAD_MEASURE_WAIT_MAX;
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}
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/**
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* Get touch sensor measurement time.
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*
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* @param meas_time Pointer to accept measurement cycle count.
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*/
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static inline void touch_ll_get_meas_time(uint16_t *meas_time)
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{
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*meas_time = SENS.sar_touch_ctrl1.touch_meas_delay;
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}
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/**
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* Set touch sensor sleep time (interval of measurement).
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*
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* @param sleep_time 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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*/
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static inline void touch_ll_set_sleep_time(uint16_t sleep_time)
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{
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//touch sensor sleep cycle Time = sleep_cycle / RTC_SLOW_CLK( can be 150k or 32k depending on the options)
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SENS.sar_touch_ctrl2.touch_sleep_cycles = sleep_time;
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}
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/**
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* Get touch sensor sleep time.
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*
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* @param sleep_time Pointer to accept sleep cycle count.
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*/
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static inline void touch_ll_get_sleep_time(uint16_t *sleep_time)
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{
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*sleep_time = SENS.sar_touch_ctrl1.touch_meas_delay;
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}
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/**
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* Set touch sensor high voltage threshold of chanrge.
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* The touch sensor measures the channel capacitance value by charging and discharging the channel.
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* So the high threshold should be less than the supply voltage.
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*
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* @param refh The high voltage threshold of chanrge.
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*/
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static inline void touch_ll_set_voltage_high(touch_high_volt_t refh)
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{
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RTCIO.touch_cfg.drefh = refh;
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}
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/**
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* Get touch sensor high voltage threshold of chanrge.
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* The touch sensor measures the channel capacitance value by charging and discharging the channel.
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* So the high threshold should be less than the supply voltage.
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*
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* @param refh The high voltage threshold of chanrge.
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*/
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static inline void touch_ll_get_voltage_high(touch_high_volt_t *refh)
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{
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*refh = (touch_high_volt_t)RTCIO.touch_cfg.drefh;
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}
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/**
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* Set touch sensor low voltage threshold of discharge.
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* The touch sensor measures the channel capacitance value by charging and discharging the channel.
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*
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* @param refl The low voltage threshold of discharge.
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*/
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static inline void touch_ll_set_voltage_low(touch_low_volt_t refl)
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{
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RTCIO.touch_cfg.drefl = refl;
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}
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/**
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* Get touch sensor low voltage threshold of discharge.
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* The touch sensor measures the channel capacitance value by charging and discharging the channel.
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*
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* @param refl The low voltage threshold of discharge.
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*/
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static inline void touch_ll_get_voltage_low(touch_low_volt_t *refl)
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{
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*refl = (touch_low_volt_t)RTCIO.touch_cfg.drefl;
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}
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/**
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* Set touch sensor high voltage attenuation of chanrge. The actual charge threshold is high voltage threshold minus attenuation value.
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* The touch sensor measures the channel capacitance value by charging and discharging the channel.
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* So the high threshold should be less than the supply voltage.
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*
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* @param refh The high voltage threshold of chanrge.
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*/
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static inline void touch_ll_set_voltage_attenuation(touch_volt_atten_t atten)
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{
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RTCIO.touch_cfg.drange = atten;
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}
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/**
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* Get touch sensor high voltage attenuation of chanrge. The actual charge threshold is high voltage threshold minus attenuation value.
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* The touch sensor measures the channel capacitance value by charging and discharging the channel.
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* So the high threshold should be less than the supply voltage.
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*
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* @param refh The high voltage threshold of chanrge.
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*/
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static inline void touch_ll_get_voltage_attenuation(touch_volt_atten_t *atten)
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{
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*atten = (touch_volt_atten_t)RTCIO.touch_cfg.drange;
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}
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/**
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* Set touch sensor charge/discharge speed(currents) for each pad.
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* If the slope is 0, the counter would always be zero.
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* If the slope is 1, the charging and discharging would be slow. The measurement time becomes longer.
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* If the slope is set 7, which is the maximum value, the charging and discharging would be fast.
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* The measurement time becomes shorter.
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*
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* @note The higher the charge and discharge current, the greater the immunity of the touch channel,
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* but it will increase the system power consumption.
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* @param touch_num Touch pad index.
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* @param slope touch pad charge/discharge speed(currents).
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*/
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static inline void touch_ll_set_slope(touch_pad_t touch_num, touch_cnt_slope_t slope)
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{
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RTCIO.touch_pad[touch_num].dac = slope;
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}
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/**
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* Get touch sensor charge/discharge speed(currents) for each pad.
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* If the slope is 0, the counter would always be zero.
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* If the slope is 1, the charging and discharging would be slow. The measurement time becomes longer.
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* If the slope is set 7, which is the maximum value, the charging and discharging would be fast.
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* The measurement time becomes shorter.
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*
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* @param touch_num Touch pad index.
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* @param slope touch pad charge/discharge speed(currents).
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*/
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static inline void touch_ll_get_slope(touch_pad_t touch_num, touch_cnt_slope_t *slope)
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{
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*slope = (touch_cnt_slope_t)RTCIO.touch_pad[touch_num].dac;
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}
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/**
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* Set initial voltage state of touch channel for each measurement.
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*
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* @param touch_num Touch pad index.
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* @param opt Initial voltage state.
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*/
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static inline void touch_ll_set_tie_option(touch_pad_t touch_num, touch_tie_opt_t opt)
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{
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touch_pad_t touch_pad_wrap = touch_ll_num_wrap(touch_num);
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RTCIO.touch_pad[touch_pad_wrap].tie_opt = opt;
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}
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/**
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* Get initial voltage state of touch channel for each measurement.
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*
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* @param touch_num Touch pad index.
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* @param opt Initial voltage state.
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*/
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static inline void touch_ll_get_tie_option(touch_pad_t touch_num, touch_tie_opt_t *opt)
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{
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touch_pad_t touch_pad_wrap = touch_ll_num_wrap(touch_num);
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*opt = (touch_tie_opt_t)RTCIO.touch_pad[touch_pad_wrap].tie_opt;
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}
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/**
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* Set touch sensor FSM mode.
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* The measurement action can be triggered by the hardware timer, as well as by the software instruction.
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*
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* @param mode FSM mode.
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*/
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static inline void touch_ll_set_fsm_mode(touch_fsm_mode_t mode)
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{
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SENS.sar_touch_ctrl2.touch_start_fsm_en = 1;
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SENS.sar_touch_ctrl2.touch_start_en = 0;
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SENS.sar_touch_ctrl2.touch_start_force = mode;
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}
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/**
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* Get touch sensor FSM mode.
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* The measurement action can be triggered by the hardware timer, as well as by the software instruction.
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*
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* @param mode FSM mode.
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*/
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static inline void touch_ll_get_fsm_mode(touch_fsm_mode_t *mode)
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{
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*mode = (touch_fsm_mode_t)SENS.sar_touch_ctrl2.touch_start_force;
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}
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/**
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* Start touch sensor FSM timer.
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* The measurement action can be triggered by the hardware timer, as well as by the software instruction.
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*
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* @param mode FSM mode.
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*/
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static inline void touch_ll_start_fsm(void)
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{
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RTCCNTL.state0.touch_slp_timer_en = 1;
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}
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/**
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* Stop touch sensor FSM timer.
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* The measurement action can be triggered by the hardware timer, as well as by the software instruction.
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*
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* @param mode FSM mode.
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*/
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static inline void touch_ll_stop_fsm(void)
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{
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RTCCNTL.state0.touch_slp_timer_en = 0;
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}
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/**
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* Trigger a touch sensor measurement, only support in SW mode of FSM.
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*/
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static inline void touch_ll_start_sw_meas(void)
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{
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SENS.sar_touch_ctrl2.touch_start_en = 0;
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SENS.sar_touch_ctrl2.touch_start_en = 1;
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}
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/**
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* Set touch sensor interrupt threshold.
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*
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* @note Refer to `touch_pad_set_trigger_mode` to see how to set trigger mode.
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* @param touch_num touch pad index.
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* @param threshold threshold of touchpad count.
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*/
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static inline void touch_ll_set_threshold(touch_pad_t touch_num, uint16_t threshold)
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{
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touch_pad_t tp_wrap = touch_ll_num_wrap(touch_num);
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if (tp_wrap & 0x1) {
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SENS.touch_thresh[tp_wrap / 2].l_thresh = threshold;
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} else {
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SENS.touch_thresh[tp_wrap / 2].h_thresh = threshold;
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}
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}
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/**
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* Get touch sensor interrupt threshold.
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*
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* @param touch_num touch pad index.
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* @param threshold pointer to accept threshold.
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*/
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static inline void touch_ll_get_threshold(touch_pad_t touch_num, uint16_t *threshold)
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{
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touch_pad_t tp_wrap = touch_ll_num_wrap(touch_num);
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if (threshold) {
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*threshold = (tp_wrap & 0x1 ) ?
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SENS.touch_thresh[tp_wrap / 2].l_thresh :
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SENS.touch_thresh[tp_wrap / 2].h_thresh;
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}
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}
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/**
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* Set touch sensor interrupt trigger mode.
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* Interrupt can be triggered either when touch value is less than
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* threshold or when touch value is more than threshold.
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*
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* @param mode Touch sensor interrupt trigger mode.
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*/
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static inline void touch_ll_set_trigger_mode(touch_trigger_mode_t mode)
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{
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SENS.sar_touch_ctrl1.touch_out_sel = mode;
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}
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/**
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* Get touch sensor interrupt trigger mode.
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* Interrupt can be triggered either when touch value is less than
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* threshold or when touch value is more than threshold.
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*
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* @param mode Touch sensor interrupt trigger mode.
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*/
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static inline void touch_ll_get_trigger_mode(touch_trigger_mode_t *mode)
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{
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*mode = (touch_trigger_mode_t)SENS.sar_touch_ctrl1.touch_out_sel;
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}
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/**
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* Set touch sensor interrupt trigger source. There are two sets of touch signals.
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* Set1 and set2 can be mapped to several touch signals. Either set will be triggered
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* if at least one of its touch signal is 'touched'. The interrupt can be configured to be generated
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* if set1 is triggered, or only if both sets are triggered.
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*
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* @param src Touch sensor interrupt trigger source.
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*/
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static inline void touch_ll_set_trigger_source(touch_trigger_src_t src)
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{
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SENS.sar_touch_ctrl1.touch_out_1en = src;
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}
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/**
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* Get touch sensor interrupt trigger source.
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*
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* @param src Pointer to accept touch sensor interrupt trigger source.
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*/
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static inline void touch_ll_get_trigger_source(touch_trigger_src_t *src)
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{
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*src = (touch_trigger_src_t)SENS.sar_touch_ctrl1.touch_out_1en;
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}
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/**
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* Enable touch sensor channel. Register touch channel into touch sensor measurement group.
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* The working mode of the touch sensor is simultaneous measurement.
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* This function will set the measure bits according to the given bitmask.
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*
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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.
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* @param enable_mask bitmask of touch sensor scan group.
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* e.g. TOUCH_PAD_NUM1 -> BIT(1)
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* @return
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* - ESP_OK on success
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*/
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static inline void touch_ll_set_channel_mask(uint16_t enable_mask)
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{
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SENS.sar_touch_enable.touch_pad_worken |= TOUCH_LL_BITS_SWAP(enable_mask);
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}
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/**
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* Get touch sensor channel mask.
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*
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* @param enable_mask bitmask of touch sensor scan group.
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* e.g. TOUCH_PAD_NUM1 -> BIT(1)
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*/
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static inline void touch_ll_get_channel_mask(uint16_t *enable_mask)
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{
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*enable_mask = TOUCH_LL_BITS_SWAP(SENS.sar_touch_enable.touch_pad_worken);
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}
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/**
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* Disable touch sensor channel by bitmask.
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*
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* @param enable_mask bitmask of touch sensor scan group.
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* e.g. TOUCH_PAD_NUM1 -> BIT(1)
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*/
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static inline void touch_ll_clear_channel_mask(uint16_t disable_mask)
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{
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SENS.sar_touch_enable.touch_pad_worken &= TOUCH_LL_BITS_SWAP(~disable_mask);
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}
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/**
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* Set touch sensor group mask.
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* Touch pad module has two sets of signals, 'Touched' signal is triggered only if
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* at least one of touch pad in this group is "touched".
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* This function will set the register bits according to the given bitmask.
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*
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* @param set1_mask bitmask of touch sensor signal group1, it's a 10-bit value
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* @param set2_mask bitmask of touch sensor signal group2, it's a 10-bit value
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*/
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static inline void touch_ll_set_group_mask(uint16_t group1_mask, uint16_t group2_mask)
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{
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SENS.sar_touch_enable.touch_pad_outen1 |= TOUCH_LL_BITS_SWAP(group1_mask);
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SENS.sar_touch_enable.touch_pad_outen2 |= TOUCH_LL_BITS_SWAP(group2_mask);
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}
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/**
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* Get touch sensor group mask.
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*
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* @param set1_mask pointer to accept bitmask of touch sensor signal group1, it's a 10-bit value
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* @param set2_mask pointer to accept bitmask of touch sensor signal group2, it's a 10-bit value
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*/
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static inline void touch_ll_get_group_mask(uint16_t *group1_mask, uint16_t *group2_mask)
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{
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*group1_mask = TOUCH_LL_BITS_SWAP(SENS.sar_touch_enable.touch_pad_outen1);
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*group2_mask = TOUCH_LL_BITS_SWAP(SENS.sar_touch_enable.touch_pad_outen2);
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}
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/**
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* Clear touch sensor group mask.
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*
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* @param set1_mask pointer to accept bitmask of touch sensor signal group1, it's a 10-bit value
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* @param set2_mask pointer to accept bitmask of touch sensor signal group2, it's a 10-bit value
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*/
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static inline void touch_ll_clear_group_mask(uint16_t group1_mask, uint16_t group2_mask)
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{
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SENS.sar_touch_enable.touch_pad_outen1 &= TOUCH_LL_BITS_SWAP(~group1_mask);
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SENS.sar_touch_enable.touch_pad_outen2 &= TOUCH_LL_BITS_SWAP(~group2_mask);
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}
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/**
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* Get the touch sensor status, usually used in ISR to decide which pads are 'touched'.
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*
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* @param status_mask The touch sensor status. e.g. Touch1 trigger status is `status_mask & (BIT1)`.
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*/
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static inline void touch_ll_read_trigger_status_mask(uint32_t *status_mask)
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{
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*status_mask = TOUCH_LL_BITS_SWAP(SENS.sar_touch_ctrl2.touch_meas_en);
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}
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/**
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* Clear all touch sensor status.
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*/
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static inline void touch_ll_clear_trigger_status_mask(void)
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{
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SENS.sar_touch_ctrl2.touch_meas_en_clr = 1;
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}
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/**
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* To enable touch pad interrupt.
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*/
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static inline void touch_ll_intr_enable(void)
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{
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RTCCNTL.int_ena.rtc_touch = 1;
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}
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/**
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* To disable touch pad interrupt.
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*/
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static inline void touch_ll_intr_disable(void)
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{
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RTCCNTL.int_ena.rtc_touch = 0;
|
|
}
|
|
|
|
/**
|
|
* To clear touch pad interrupt.
|
|
*/
|
|
static inline void touch_ll_intr_clear(void)
|
|
{
|
|
RTCCNTL.int_clr.rtc_touch = 1;
|
|
}
|
|
|
|
/**
|
|
* Get touch sensor raw data (touch sensor counter value) from register. No block.
|
|
*
|
|
* @param touch_num touch pad index.
|
|
* @return touch_value pointer to accept touch sensor value.
|
|
*/
|
|
static inline uint32_t touch_ll_read_raw_data(touch_pad_t touch_num)
|
|
{
|
|
touch_pad_t tp_wrap = touch_ll_num_wrap(touch_num);
|
|
return ((tp_wrap & 0x1) ? SENS.touch_meas[tp_wrap / 2].l_val : SENS.touch_meas[tp_wrap / 2].h_val);
|
|
}
|
|
|
|
/**
|
|
* Get touch sensor measure status. No block.
|
|
*
|
|
* @return
|
|
* - If touch sensors measure done.
|
|
*/
|
|
static inline bool touch_ll_meas_is_done(void)
|
|
{
|
|
return (bool)SENS.sar_touch_ctrl2.touch_meas_done;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|