94 lines
3.1 KiB
C
94 lines
3.1 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2020 microDev
|
|
*
|
|
* 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 "shared-bindings/touchio/TouchIn.h"
|
|
|
|
#include "py/runtime.h"
|
|
#include "peripherals/touch.h"
|
|
#include "shared-bindings/microcontroller/Pin.h"
|
|
|
|
static uint16_t get_raw_reading(touchio_touchin_obj_t *self) {
|
|
#if defined(CONFIG_IDF_TARGET_ESP32)
|
|
uint16_t touch_value;
|
|
#else
|
|
uint32_t touch_value;
|
|
#endif;
|
|
touch_pad_read_raw_data(self->pin->touch_channel, &touch_value);
|
|
if (touch_value > UINT16_MAX) {
|
|
return UINT16_MAX;
|
|
}
|
|
return (uint16_t)touch_value;
|
|
}
|
|
|
|
void common_hal_touchio_touchin_construct(touchio_touchin_obj_t *self,
|
|
const mcu_pin_obj_t *pin) {
|
|
if (pin->touch_channel == TOUCH_PAD_MAX) {
|
|
raise_ValueError_invalid_pin();
|
|
}
|
|
claim_pin(pin);
|
|
|
|
// initialize touchpad
|
|
peripherals_touch_init(pin->touch_channel);
|
|
|
|
// wait for touch data to reset
|
|
mp_hal_delay_ms(10);
|
|
|
|
// Set a "touched" threshold not too far above the initial value.
|
|
// For simple finger touch, the values may vary as much as a factor of two,
|
|
// but for touches using fruit or other objects, the difference is much less.
|
|
|
|
self->pin = pin;
|
|
self->threshold = get_raw_reading(self) + 100;
|
|
}
|
|
|
|
bool common_hal_touchio_touchin_deinited(touchio_touchin_obj_t *self) {
|
|
return self->pin == NULL;
|
|
}
|
|
|
|
void common_hal_touchio_touchin_deinit(touchio_touchin_obj_t *self) {
|
|
if (common_hal_touchio_touchin_deinited(self)) {
|
|
return;
|
|
}
|
|
reset_pin_number(self->pin->touch_channel);
|
|
self->pin = NULL;
|
|
}
|
|
|
|
bool common_hal_touchio_touchin_get_value(touchio_touchin_obj_t *self) {
|
|
return get_raw_reading(self) > self->threshold;
|
|
}
|
|
|
|
uint16_t common_hal_touchio_touchin_get_raw_value(touchio_touchin_obj_t *self) {
|
|
return get_raw_reading(self);
|
|
}
|
|
|
|
uint16_t common_hal_touchio_touchin_get_threshold(touchio_touchin_obj_t *self) {
|
|
return self->threshold;
|
|
}
|
|
|
|
void common_hal_touchio_touchin_set_threshold(touchio_touchin_obj_t *self, uint16_t new_threshold) {
|
|
self->threshold = new_threshold;
|
|
}
|