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PYFW-318: Integrate Touch Esp32 functionality exposed to micropy
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‎esp32/application.mk

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@@ -148,6 +148,7 @@ APP_MODS_SRC_C = $(addprefix mods/,\
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machwdt.c \
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machrmt.c \
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lwipsocket.c \
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machtouch.c \
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)
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APP_MODS_LORA_SRC_C = $(addprefix mods/,\

‎esp32/mods/machtouch.c

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/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2017 Nick Moore
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include "esp_log.h"
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#include "driver/gpio.h"
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#include "driver/touch_pad.h"
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "machtouch.h"
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#include "machpin.h"
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#include "freertos/FreeRTOS.h"
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#include "freertos/task.h"
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#define TOUCHPAD_FILTER_TOUCH_PERIOD_MS (10)
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typedef struct _mtp_obj_t {
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mp_obj_base_t base;
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gpio_num_t gpio_id;
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touch_pad_t touchpad_id;
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uint16_t init_value;
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} mtp_obj_t;
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STATIC mtp_obj_t touchpad_obj[] = {
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{{&machine_touchpad_type}, GPIO_NUM_4, TOUCH_PAD_NUM0},
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{{&machine_touchpad_type}, GPIO_NUM_0, TOUCH_PAD_NUM1},
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{{&machine_touchpad_type}, GPIO_NUM_2, TOUCH_PAD_NUM2},
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{{&machine_touchpad_type}, GPIO_NUM_15, TOUCH_PAD_NUM3},
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{{&machine_touchpad_type}, GPIO_NUM_13, TOUCH_PAD_NUM4},
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{{&machine_touchpad_type}, GPIO_NUM_12, TOUCH_PAD_NUM5},
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{{&machine_touchpad_type}, GPIO_NUM_14, TOUCH_PAD_NUM6},
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{{&machine_touchpad_type}, GPIO_NUM_27, TOUCH_PAD_NUM7},
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{{&machine_touchpad_type}, GPIO_NUM_33, TOUCH_PAD_NUM8},
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{{&machine_touchpad_type}, GPIO_NUM_32, TOUCH_PAD_NUM9},
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};
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STATIC mp_obj_t mtp_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw,
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const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 1, 1, true);
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pin_obj_t *pin = pin_find(args[0]);
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mtp_obj_t *self = NULL;
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for (int i = 0; i < MP_ARRAY_SIZE(touchpad_obj); i++) {
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if (pin->pin_number == touchpad_obj[i].gpio_id) { self = &touchpad_obj[i]; break; }
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}
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if (!self) mp_raise_ValueError("invalid pin for touchpad");
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static int initialized = 0;
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if (!initialized) {
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touch_pad_init();
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// If use interrupt trigger mode, should set touch sensor FSM mode at 'TOUCH_FSM_MODE_TIMER'.
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touch_pad_set_fsm_mode(TOUCH_FSM_MODE_TIMER);
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// Set reference voltage for charging/discharging
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// For most usage scenarios, we recommend using the following combination:
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// the high reference valtage will be 2.7V - 1V = 1.7V, The low reference voltage will be 0.5V.
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touch_pad_set_voltage(TOUCH_HVOLT_2V7, TOUCH_LVOLT_0V5, TOUCH_HVOLT_ATTEN_1V);
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// initialize and start a software filter to detect slight changes in capacitance
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touch_pad_filter_start(TOUCHPAD_FILTER_TOUCH_PERIOD_MS);
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touch_pad_intr_disable();
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touch_pad_clear_status();
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initialized = 1;
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}
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esp_err_t err = touch_pad_config(self->touchpad_id, 0);
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mp_hal_delay_ms(TOUCHPAD_FILTER_TOUCH_PERIOD_MS * 2);
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touch_pad_read_filtered(self->touchpad_id, &self->init_value);
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if (err == ESP_OK) return MP_OBJ_FROM_PTR(self);
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mp_raise_ValueError("Touch pad error");
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}
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STATIC mp_obj_t mtp_config(mp_obj_t self_in, mp_obj_t value_in) {
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mtp_obj_t *self = self_in;
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uint16_t value = mp_obj_get_int(value_in);
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esp_err_t err = touch_pad_config(self->touchpad_id, value);
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if (err == ESP_OK) return mp_const_none;
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mp_raise_ValueError("Touch pad error");
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}
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MP_DEFINE_CONST_FUN_OBJ_2(mtp_config_obj, mtp_config);
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STATIC mp_obj_t mtp_read(mp_obj_t self_in) {
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mtp_obj_t *self = self_in;
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uint16_t value;
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esp_err_t err = touch_pad_read_filtered(self->touchpad_id, &value);
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if (err == ESP_OK) return MP_OBJ_NEW_SMALL_INT(value);
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mp_raise_ValueError("Touch pad error");
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}
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MP_DEFINE_CONST_FUN_OBJ_1(mtp_read_obj, mtp_read);
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STATIC mp_obj_t mtp_init_value(uint n_args, const mp_obj_t *arg) {
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mtp_obj_t *self = arg[0];
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if (n_args > 1) {
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self->init_value = mp_obj_get_int(arg[1]);
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return mp_const_none;
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} else {
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return MP_OBJ_NEW_SMALL_INT(self->init_value);
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}
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mtp_init_value_obj, 1, 2, mtp_init_value);
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STATIC const mp_rom_map_elem_t mtp_locals_dict_table[] = {
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// instance methods
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{ MP_ROM_QSTR(MP_QSTR_config), MP_ROM_PTR(&mtp_config_obj) },
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{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mtp_read_obj) },
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{ MP_ROM_QSTR(MP_QSTR_init_value), MP_ROM_PTR(&mtp_init_value_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(mtp_locals_dict, mtp_locals_dict_table);
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const mp_obj_type_t machine_touchpad_type = {
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{ &mp_type_type },
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.name = MP_QSTR_TouchPad,
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.make_new = mtp_make_new,
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.locals_dict = (mp_obj_t)&mtp_locals_dict,
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};

‎esp32/mods/machtouch.h

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/*
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* Copyright (c) 2016, Pycom Limited.
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*
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* This software is licensed under the GNU GPL version 3 or any
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* later version, with permitted additional terms. For more information
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* see the Pycom Licence v1.0 document supplied with this file, or
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* available at https://www.pycom.io/opensource/licensing
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*/
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#ifndef MACHTOUCH_H_
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#define MACHTOUCH_H_
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extern const mp_obj_type_t machine_touchpad_type;
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#endif // MACHTOUCH_H_

‎esp32/mods/modmachine.c

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#include "machwdt.h"
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#include "machcan.h"
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#include "machrmt.h"
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#include "machtouch.h"
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#include "pycom_config.h"
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#if defined (GPY) || defined (FIPY)
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#include "lteppp.h"
@@ -417,6 +418,8 @@ STATIC const mp_rom_map_elem_t machine_module_globals_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_WDT), (mp_obj_t)&mach_wdt_type },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_CAN), (mp_obj_t)&mach_can_type },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_RMT), (mp_obj_t)&mach_rmt_type },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_Touch), (mp_obj_t)&machine_touchpad_type },
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// constants
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{ MP_OBJ_NEW_QSTR(MP_QSTR_PWRON_RESET), MP_OBJ_NEW_SMALL_INT(MPSLEEP_PWRON_RESET) },

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