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@ -28,15 +28,9 @@
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#include <string.h>
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#include <stdio.h>
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#include "py/nlr.h"
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#include "py/mperrno.h"
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#include "py/runtime.h"
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#include "py/binary.h"
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#include "py/mphal.h"
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#include "shared-bindings/touchio/TouchIn.h"
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#include "supervisor/shared/translate.h"
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#include "nrf.h"
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// This is a capacitive touch sensing routine using a single digital
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// pin. The pin should be connected to the sensing pad, and to ground
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@ -57,15 +51,14 @@ static uint16_t get_raw_reading(touchio_touchin_obj_t *self) {
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for (uint16_t i = 0; i < N_SAMPLES; i++) {
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// set pad to digital output high for 10us to charge it
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nrf_gpio_cfg_output(self->pin->number);
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nrf_gpio_pin_set(self->pin->number);
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common_hal_digitalio_digitalinout_switch_to_output(self->digitalinout, true, DRIVE_MODE_PUSH_PULL);
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mp_hal_delay_us(10);
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// set pad back to an input and take some samples
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nrf_gpio_cfg_input(self->pin->number, NRF_GPIO_PIN_NOPULL);
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common_hal_digitalio_digitalinout_switch_to_input(self->digitalinout, PULL_NONE);
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while(nrf_gpio_pin_read(self->pin->number)) {
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while(common_hal_digitalio_digitalinout_get_value(self->digitalinout)) {
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if (ticks >= TIMEOUT_TICKS) return TIMEOUT_TICKS;
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ticks++;
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}
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@ -73,16 +66,17 @@ static uint16_t get_raw_reading(touchio_touchin_obj_t *self) {
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return ticks;
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}
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void common_hal_touchio_touchin_construct(touchio_touchin_obj_t* self,
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const mcu_pin_obj_t *pin) {
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self->pin = pin;
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claim_pin(pin);
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void common_hal_touchio_touchin_construct(touchio_touchin_obj_t* self, const mcu_pin_obj_t *pin) {
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self->digitalinout = m_new_obj(digitalio_digitalinout_obj_t);
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self->digitalinout->base.type = &digitalio_digitalinout_type;
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common_hal_digitalio_digitalinout_construct(self->digitalinout, pin);
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self->threshold = get_raw_reading(self) * 1.05 + 100;
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}
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bool common_hal_touchio_touchin_deinited(touchio_touchin_obj_t* self) {
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return self->pin == NULL;
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return self->digitalinout == MP_OBJ_NULL;
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}
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void common_hal_touchio_touchin_deinit(touchio_touchin_obj_t* self) {
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@ -90,8 +84,8 @@ void common_hal_touchio_touchin_deinit(touchio_touchin_obj_t* self) {
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return;
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}
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reset_pin_number(self->pin->number);
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self->pin = NULL;
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common_hal_digitalio_digitalinout_deinit(self->digitalinout);
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self->digitalinout = MP_OBJ_NULL;
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}
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void touchin_reset() {
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Dan Halbert
4 years ago