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micropython/ports/esp32/machine_touchpad.c
Vincent1-python e6f1f78713 esp32: Add support for ESP32-P4. 
This commit adds support for ESP32-P4 SoCs.

Signed-off-by: Vincent1-python <pywei201209@163.com>
Signed-off-by: Angus Gratton <angus@redyak.com.au>
Signed-off-by: Damien George <damien@micropython.org>
2025-12-01 13:08:52 +11:00

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017 Nick Moore
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "py/runtime.h"
#include "py/mphal.h"
#include "modmachine.h"
#include "driver/gpio.h"
#if SOC_TOUCH_SENSOR_SUPPORTED
#if ESP_IDF_VERSION < ESP_IDF_VERSION_VAL(5, 3, 0)
#if SOC_TOUCH_VERSION_1
#define SOC_TOUCH_SENSOR_VERSION (1)
#elif SOC_TOUCH_VERSION_2
#define SOC_TOUCH_SENSOR_VERSION (2)
#endif
#endif
#if SOC_TOUCH_SENSOR_VERSION == 1 // ESP32 only
#include "driver/touch_pad.h"
#elif SOC_TOUCH_SENSOR_VERSION == 2 // most ESP32
#include "driver/touch_sensor.h"
#elif SOC_TOUCH_SENSOR_VERSION == 3 // At present, it can only be used on ESP32P4.
#include "driver/touch_sens.h"
#include "soc/touch_sensor_channel.h"
#else
#error "Unknown touch hardware version"
#endif
typedef struct _mtp_obj_t {
mp_obj_base_t base;
gpio_num_t gpio_id;
#if SOC_TOUCH_SENSOR_VERSION == 1 || SOC_TOUCH_SENSOR_VERSION == 2
touch_pad_t touchpad_id;
#elif SOC_TOUCH_SENSOR_VERSION == 3
int touchpad_id;
#endif
} mtp_obj_t;
#if SOC_TOUCH_SENSOR_VERSION == 3
static touch_sensor_handle_t touch_sens_handle;
static touch_channel_handle_t touch_chan_handle[15];
#endif
static const mtp_obj_t touchpad_obj[] = {
#if CONFIG_IDF_TARGET_ESP32
{{&machine_touchpad_type}, GPIO_NUM_4, TOUCH_PAD_NUM0},
{{&machine_touchpad_type}, GPIO_NUM_0, TOUCH_PAD_NUM1},
{{&machine_touchpad_type}, GPIO_NUM_2, TOUCH_PAD_NUM2},
{{&machine_touchpad_type}, GPIO_NUM_15, TOUCH_PAD_NUM3},
{{&machine_touchpad_type}, GPIO_NUM_13, TOUCH_PAD_NUM4},
{{&machine_touchpad_type}, GPIO_NUM_12, TOUCH_PAD_NUM5},
{{&machine_touchpad_type}, GPIO_NUM_14, TOUCH_PAD_NUM6},
{{&machine_touchpad_type}, GPIO_NUM_27, TOUCH_PAD_NUM7},
{{&machine_touchpad_type}, GPIO_NUM_33, TOUCH_PAD_NUM8},
{{&machine_touchpad_type}, GPIO_NUM_32, TOUCH_PAD_NUM9},
#elif CONFIG_IDF_TARGET_ESP32S2 || CONFIG_IDF_TARGET_ESP32S3
{{&machine_touchpad_type}, GPIO_NUM_1, TOUCH_PAD_NUM1},
{{&machine_touchpad_type}, GPIO_NUM_2, TOUCH_PAD_NUM2},
{{&machine_touchpad_type}, GPIO_NUM_3, TOUCH_PAD_NUM3},
{{&machine_touchpad_type}, GPIO_NUM_4, TOUCH_PAD_NUM4},
{{&machine_touchpad_type}, GPIO_NUM_5, TOUCH_PAD_NUM5},
{{&machine_touchpad_type}, GPIO_NUM_6, TOUCH_PAD_NUM6},
{{&machine_touchpad_type}, GPIO_NUM_7, TOUCH_PAD_NUM7},
{{&machine_touchpad_type}, GPIO_NUM_8, TOUCH_PAD_NUM8},
{{&machine_touchpad_type}, GPIO_NUM_9, TOUCH_PAD_NUM9},
{{&machine_touchpad_type}, GPIO_NUM_10, TOUCH_PAD_NUM10},
{{&machine_touchpad_type}, GPIO_NUM_11, TOUCH_PAD_NUM11},
{{&machine_touchpad_type}, GPIO_NUM_12, TOUCH_PAD_NUM12},
{{&machine_touchpad_type}, GPIO_NUM_13, TOUCH_PAD_NUM13},
{{&machine_touchpad_type}, GPIO_NUM_14, TOUCH_PAD_NUM14},
#elif CONFIG_IDF_TARGET_ESP32P4
{{&machine_touchpad_type}, GPIO_NUM_2, TOUCH_PAD_GPIO2_CHANNEL},
{{&machine_touchpad_type}, GPIO_NUM_3, TOUCH_PAD_GPIO3_CHANNEL},
{{&machine_touchpad_type}, GPIO_NUM_4, TOUCH_PAD_GPIO4_CHANNEL},
{{&machine_touchpad_type}, GPIO_NUM_5, TOUCH_PAD_GPIO5_CHANNEL},
{{&machine_touchpad_type}, GPIO_NUM_6, TOUCH_PAD_GPIO6_CHANNEL},
{{&machine_touchpad_type}, GPIO_NUM_7, TOUCH_PAD_GPIO7_CHANNEL},
{{&machine_touchpad_type}, GPIO_NUM_8, TOUCH_PAD_GPIO8_CHANNEL},
{{&machine_touchpad_type}, GPIO_NUM_9, TOUCH_PAD_GPIO9_CHANNEL},
{{&machine_touchpad_type}, GPIO_NUM_10, TOUCH_PAD_GPIO10_CHANNEL},
{{&machine_touchpad_type}, GPIO_NUM_11, TOUCH_PAD_GPIO11_CHANNEL},
{{&machine_touchpad_type}, GPIO_NUM_12, TOUCH_PAD_GPIO12_CHANNEL},
{{&machine_touchpad_type}, GPIO_NUM_13, TOUCH_PAD_GPIO13_CHANNEL},
{{&machine_touchpad_type}, GPIO_NUM_14, TOUCH_PAD_GPIO14_CHANNEL},
{{&machine_touchpad_type}, GPIO_NUM_15, TOUCH_PAD_GPIO15_CHANNEL},
#else
#error "Please add GPIO mapping for this SoC"
#endif
};
static mp_obj_t mtp_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw,
const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 1, 1, true);
gpio_num_t pin_id = machine_pin_get_id(args[0]);
const mtp_obj_t *self = NULL;
for (int i = 0; i < MP_ARRAY_SIZE(touchpad_obj); i++) {
if (pin_id == touchpad_obj[i].gpio_id) {
self = &touchpad_obj[i];
break;
}
}
if (!self) {
mp_raise_ValueError(MP_ERROR_TEXT("invalid pin for touchpad"));
}
static int initialized = 0;
if (!initialized) {
#if SOC_TOUCH_SENSOR_VERSION == 1 || SOC_TOUCH_SENSOR_VERSION == 2
touch_pad_init();
touch_pad_set_fsm_mode(TOUCH_FSM_MODE_TIMER);
#elif SOC_TOUCH_SENSOR_VERSION == 3
touch_sensor_sample_config_t sample_cfg[1] = {
TOUCH_SENSOR_V3_DEFAULT_SAMPLE_CONFIG(1, 1, 1),
};
touch_sensor_config_t sens_cfg = TOUCH_SENSOR_DEFAULT_BASIC_CONFIG(1, sample_cfg);
check_esp_err(touch_sensor_new_controller(&sens_cfg, &touch_sens_handle));
touch_sensor_filter_config_t filter_cfg = TOUCH_SENSOR_DEFAULT_FILTER_CONFIG();
check_esp_err(touch_sensor_config_filter(touch_sens_handle, &filter_cfg));
#endif
initialized = 1;
}
#if SOC_TOUCH_SENSOR_VERSION == 3
else {
// Stop the touch controller so a new channel can be added.
check_esp_err(touch_sensor_stop_continuous_scanning(touch_sens_handle));
check_esp_err(touch_sensor_disable(touch_sens_handle));
}
#endif
#if SOC_TOUCH_SENSOR_VERSION == 1
esp_err_t err = touch_pad_config(self->touchpad_id, 0);
#elif SOC_TOUCH_SENSOR_VERSION == 2
esp_err_t err = touch_pad_config(self->touchpad_id);
#elif SOC_TOUCH_SENSOR_VERSION == 3
touch_channel_config_t chan_cfg = {
.active_thresh = {1000},
};
esp_err_t err = ESP_OK;
if (touch_chan_handle[self->touchpad_id] != NULL) {
err = touch_sensor_del_channel(touch_chan_handle[self->touchpad_id]);
touch_chan_handle[self->touchpad_id] = NULL;
}
if (err == ESP_OK) {
err = touch_sensor_new_channel(touch_sens_handle, self->touchpad_id, &chan_cfg, &touch_chan_handle[self->touchpad_id]);
}
check_esp_err(touch_sensor_enable(touch_sens_handle));
check_esp_err(touch_sensor_start_continuous_scanning(touch_sens_handle));
#endif
if (err == ESP_OK) {
#if SOC_TOUCH_SENSOR_VERSION == 2
touch_pad_fsm_start();
#endif
return MP_OBJ_FROM_PTR(self);
}
mp_raise_ValueError(MP_ERROR_TEXT("Touch pad error"));
}
#if SOC_TOUCH_SENSOR_VERSION == 1 || SOC_TOUCH_SENSOR_VERSION == 2
static mp_obj_t mtp_config(mp_obj_t self_in, mp_obj_t value_in) {
mtp_obj_t *self = self_in;
#if SOC_TOUCH_SENSOR_VERSION == 1
uint16_t value = mp_obj_get_int(value_in);
esp_err_t err = touch_pad_config(self->touchpad_id, value);
#elif SOC_TOUCH_SENSOR_VERSION == 2
esp_err_t err = touch_pad_config(self->touchpad_id);
#endif
if (err == ESP_OK) {
return mp_const_none;
}
mp_raise_ValueError(MP_ERROR_TEXT("Touch pad error"));
}
MP_DEFINE_CONST_FUN_OBJ_2(mtp_config_obj, mtp_config);
#endif
static mp_obj_t mtp_read(mp_obj_t self_in) {
mtp_obj_t *self = self_in;
#if SOC_TOUCH_SENSOR_VERSION == 1
uint16_t value;
esp_err_t err = touch_pad_read(self->touchpad_id, &value);
#elif SOC_TOUCH_SENSOR_VERSION == 2
uint32_t value;
esp_err_t err = touch_pad_read_raw_data(self->touchpad_id, &value);
#elif SOC_TOUCH_SENSOR_VERSION == 3
uint32_t value;
esp_err_t err = touch_channel_read_data(touch_chan_handle[self->touchpad_id], TOUCH_CHAN_DATA_TYPE_SMOOTH, &value);
#endif
if (err == ESP_OK) {
return MP_OBJ_NEW_SMALL_INT(value);
}
mp_raise_ValueError(MP_ERROR_TEXT("Touch pad error"));
}
MP_DEFINE_CONST_FUN_OBJ_1(mtp_read_obj, mtp_read);
static const mp_rom_map_elem_t mtp_locals_dict_table[] = {
// instance methods
#if SOC_TOUCH_SENSOR_VERSION == 1 || SOC_TOUCH_SENSOR_VERSION == 2
{ MP_ROM_QSTR(MP_QSTR_config), MP_ROM_PTR(&mtp_config_obj) },
#endif
{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mtp_read_obj) },
};
static MP_DEFINE_CONST_DICT(mtp_locals_dict, mtp_locals_dict_table);
MP_DEFINE_CONST_OBJ_TYPE(
machine_touchpad_type,
MP_QSTR_TouchPad,
MP_TYPE_FLAG_NONE,
make_new, mtp_make_new,
locals_dict, &mtp_locals_dict
);
#endif // SOC_TOUCH_SENSOR_SUPPORTED
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