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Diffstat (limited to 'circuitpython/shared-module/keypad/Keys.c')
-rw-r--r-- | circuitpython/shared-module/keypad/Keys.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/circuitpython/shared-module/keypad/Keys.c b/circuitpython/shared-module/keypad/Keys.c new file mode 100644 index 0000000..d74a3ab --- /dev/null +++ b/circuitpython/shared-module/keypad/Keys.c @@ -0,0 +1,111 @@ +/* + * This file is part of the Micro Python project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2021 Dan Halbert for Adafruit Industries + * + * 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 <string.h> + +#include "py/gc.h" +#include "py/runtime.h" +#include "shared-bindings/digitalio/DigitalInOut.h" +#include "shared-bindings/keypad/EventQueue.h" +#include "shared-bindings/keypad/Keys.h" +#include "shared-bindings/keypad/__init__.h" +#include "shared-bindings/supervisor/__init__.h" +#include "supervisor/port.h" +#include "supervisor/shared/tick.h" + +static void keypad_keys_scan_now(void *self_in, mp_obj_t timestamp); +static size_t keys_get_key_count(void *self_in); + +static keypad_scanner_funcs_t keys_funcs = { + .scan_now = keypad_keys_scan_now, + .get_key_count = keys_get_key_count, +}; + +void common_hal_keypad_keys_construct(keypad_keys_obj_t *self, mp_uint_t num_pins, const mcu_pin_obj_t *pins[], bool value_when_pressed, bool pull, mp_float_t interval, size_t max_events) { + mp_obj_t dios[num_pins]; + + for (size_t i = 0; i < num_pins; i++) { + digitalio_digitalinout_obj_t *dio = m_new_obj(digitalio_digitalinout_obj_t); + dio->base.type = &digitalio_digitalinout_type; + common_hal_digitalio_digitalinout_construct(dio, pins[i]); + if (pull) { + common_hal_digitalio_digitalinout_set_pull(dio, value_when_pressed ? PULL_DOWN : PULL_UP); + } + dios[i] = dio; + } + + self->digitalinouts = mp_obj_new_tuple(num_pins, dios); + self->currently_pressed = (bool *)gc_alloc(sizeof(bool) * num_pins, false, false); + self->previously_pressed = (bool *)gc_alloc(sizeof(bool) * num_pins, false, false); + self->value_when_pressed = value_when_pressed; + self->funcs = &keys_funcs; + + keypad_construct_common((keypad_scanner_obj_t *)self, interval, max_events); + +} + +void common_hal_keypad_keys_deinit(keypad_keys_obj_t *self) { + if (common_hal_keypad_deinited(self)) { + return; + } + + // Remove self from the list of active keypad scanners first. + keypad_deregister_scanner((keypad_scanner_obj_t *)self); + + for (size_t key = 0; key < keys_get_key_count(self); key++) { + common_hal_digitalio_digitalinout_deinit(self->digitalinouts->items[key]); + } + self->digitalinouts = MP_ROM_NONE; + + common_hal_keypad_deinit_core(self); +} + +size_t keys_get_key_count(void *self_in) { + keypad_keys_obj_t *self = self_in; + return self->digitalinouts->len; +} + +static void keypad_keys_scan_now(void *self_in, mp_obj_t timestamp) { + keypad_keys_obj_t *self = self_in; + size_t key_count = keys_get_key_count(self); + + for (mp_uint_t key_number = 0; key_number < key_count; key_number++) { + // Remember the previous up/down state. + const bool previous = self->currently_pressed[key_number]; + self->previously_pressed[key_number] = previous; + + // Get the current state. + const bool current = + common_hal_digitalio_digitalinout_get_value(self->digitalinouts->items[key_number]) == + self->value_when_pressed; + self->currently_pressed[key_number] = current; + + // Record any transitions. + if (previous != current) { + keypad_eventqueue_record(self->events, key_number, current, timestamp); + } + } +} |