circuitpython/shared-bindings/keypad/KeyMatrix.c

237 lines
11 KiB
C

/*
* 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 "shared/runtime/context_manager_helpers.h"
#include "py/binary.h"
#include "py/objproperty.h"
#include "py/runtime.h"
#include "shared-bindings/keypad/__init__.h"
#include "shared-bindings/keypad/Event.h"
#include "shared-bindings/keypad/KeyMatrix.h"
#include "shared-bindings/microcontroller/Pin.h"
#include "shared-bindings/util.h"
//| class KeyMatrix:
//| """Manage a 2D matrix of keys with row and column pins."""
//|
//| def __init__(
//| self,
//| row_pins: Sequence[microcontroller.Pin],
//| column_pins: Sequence[microcontroller.Pin],
//| columns_to_anodes: bool = True,
//| interval: float = 0.020,
//| max_events: int = 64,
//| ) -> None:
//| """
//| Create a `Keys` object that will scan the key matrix attached to the given row and column pins.
//| There should not be any external pull-ups or pull-downs on the matrix:
//| ``KeyMatrix`` enables internal pull-ups or pull-downs on the pins as necessary.
//|
//| The keys are numbered sequentially from zero. A key number can be computed
//| by ``row * len(column_pins) + column``.
//|
//| An `EventQueue` is created when this object is created and is available in the `events` attribute.
//|
//| :param Sequence[microcontroller.Pin] row_pins: The pins attached to the rows.
//| :param Sequence[microcontroller.Pin] column_pins: The pins attached to the colums.
//| :param bool columns_to_anodes: Default ``True``.
//| If the matrix uses diodes, the diode anodes are typically connected to the column pins,
//| and the cathodes should be connected to the row pins. If your diodes are reversed,
//| set ``columns_to_anodes`` to ``False``.
//| :param float interval: Scan keys no more often than ``interval`` to allow for debouncing.
//| ``interval`` is in float seconds. The default is 0.020 (20 msecs).
//| :param int max_events: maximum size of `events` `EventQueue`:
//| maximum number of key transition events that are saved.
//| Must be >= 1.
//| If a new event arrives when the queue is full, the oldest event is discarded.
//| """
//| ...
STATIC mp_obj_t keypad_keymatrix_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
keypad_keymatrix_obj_t *self = m_new_obj(keypad_keymatrix_obj_t);
self->base.type = &keypad_keymatrix_type;
enum { ARG_row_pins, ARG_column_pins, ARG_columns_to_anodes, ARG_interval, ARG_max_events };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_row_pins, MP_ARG_REQUIRED | MP_ARG_OBJ },
{ MP_QSTR_column_pins, MP_ARG_REQUIRED | MP_ARG_OBJ },
{ MP_QSTR_columns_to_anodes, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = true} },
{ MP_QSTR_interval, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
{ MP_QSTR_max_events, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 64} },
};
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
mp_obj_t row_pins = args[ARG_row_pins].u_obj;
// mp_obj_len() will be >= 0.
const size_t num_row_pins = (size_t)MP_OBJ_SMALL_INT_VALUE(mp_obj_len(row_pins));
mp_obj_t column_pins = args[ARG_column_pins].u_obj;
const size_t num_column_pins = (size_t)MP_OBJ_SMALL_INT_VALUE(mp_obj_len(column_pins));
const mp_float_t interval =
mp_arg_validate_obj_float_non_negative(args[ARG_interval].u_obj, 0.020f, MP_QSTR_interval);
const size_t max_events = (size_t)mp_arg_validate_int_min(args[ARG_max_events].u_int, 1, MP_QSTR_max_events);
const mcu_pin_obj_t *row_pins_array[num_row_pins];
const mcu_pin_obj_t *column_pins_array[num_column_pins];
validate_no_duplicate_pins_2(row_pins, column_pins, MP_QSTR_row_pins, MP_QSTR_column_pins);
for (size_t row = 0; row < num_row_pins; row++) {
const mcu_pin_obj_t *pin =
validate_obj_is_free_pin(mp_obj_subscr(row_pins, MP_OBJ_NEW_SMALL_INT(row), MP_OBJ_SENTINEL), MP_QSTR_pin);
row_pins_array[row] = pin;
}
for (size_t column = 0; column < num_column_pins; column++) {
const mcu_pin_obj_t *pin =
validate_obj_is_free_pin(mp_obj_subscr(column_pins, MP_OBJ_NEW_SMALL_INT(column), MP_OBJ_SENTINEL), MP_QSTR_pin);
column_pins_array[column] = pin;
}
common_hal_keypad_keymatrix_construct(self, num_row_pins, row_pins_array, num_column_pins, column_pins_array, args[ARG_columns_to_anodes].u_bool, interval, max_events);
return MP_OBJ_FROM_PTR(self);
}
//| def deinit(self) -> None:
//| """Stop scanning and release the pins."""
//| ...
STATIC mp_obj_t keypad_keymatrix_deinit(mp_obj_t self_in) {
keypad_keymatrix_obj_t *self = MP_OBJ_TO_PTR(self_in);
common_hal_keypad_keymatrix_deinit(self);
return MP_ROM_NONE;
}
MP_DEFINE_CONST_FUN_OBJ_1(keypad_keymatrix_deinit_obj, keypad_keymatrix_deinit);
//| def __enter__(self) -> KeyMatrix:
//| """No-op used by Context Managers."""
//| ...
// Provided by context manager helper.
//| def __exit__(self) -> None:
//| """Automatically deinitializes when exiting a context. See
//| :ref:`lifetime-and-contextmanagers` for more info."""
//| ...
STATIC mp_obj_t keypad_keymatrix___exit__(size_t n_args, const mp_obj_t *args) {
(void)n_args;
common_hal_keypad_keymatrix_deinit(args[0]);
return MP_ROM_NONE;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(keypad_keymatrix___exit___obj, 4, 4, keypad_keymatrix___exit__);
STATIC void check_for_deinit(keypad_keymatrix_obj_t *self) {
if (common_hal_keypad_deinited(self)) {
raise_deinited_error();
}
}
//| def reset(self) -> None:
//| """Reset the internal state of the scanner to assume that all keys are now released.
//| Any key that is already pressed at the time of this call will therefore immediately cause
//| a new key-pressed event to occur.
//| """
//| ...
//| key_count: int
//| """The number of keys that are being scanned. (read-only)
//| """
//| def key_number_to_row_column(self, key_number: int) -> Tuple[int]:
//| """Return the row and column for the given key number.
//| The row is ``key_number // len(column_pins)``.
//| The column is ``key_number % len(column_pins)``.
//|
//| :return: ``(row, column)``
//| :rtype: Tuple[int]
//| """
//| ...
STATIC mp_obj_t keypad_keymatrix_key_number_to_row_column(mp_obj_t self_in, mp_obj_t key_number_in) {
keypad_keymatrix_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
const mp_uint_t key_number = (mp_uint_t)mp_arg_validate_int_range(
mp_obj_get_int(key_number_in),
0, (mp_int_t)common_hal_keypad_generic_get_key_count(self),
MP_QSTR_key_number);
mp_uint_t row;
mp_uint_t column;
common_hal_keypad_keymatrix_key_number_to_row_column(self, key_number, &row, &column);
mp_obj_t row_column[2];
row_column[0] = MP_OBJ_NEW_SMALL_INT(row);
row_column[1] = MP_OBJ_NEW_SMALL_INT(column);
return mp_obj_new_tuple(2, row_column);
}
MP_DEFINE_CONST_FUN_OBJ_2(keypad_keymatrix_key_number_to_row_column_obj, keypad_keymatrix_key_number_to_row_column);
//| def row_column_to_key_number(self, row: int, column: int) -> int:
//| """Return the key number for a given row and column.
//| The key number is ``row * len(column_pins) + column``.
//| """
//| ...
STATIC mp_obj_t keypad_keymatrix_row_column_to_key_number(mp_obj_t self_in, mp_obj_t row_in, mp_obj_t column_in) {
keypad_keymatrix_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
const mp_uint_t row = (mp_uint_t)mp_arg_validate_int_range(
mp_obj_get_int(row_in), 0, (mp_int_t)common_hal_keypad_keymatrix_get_row_count(self), MP_QSTR_row);
const mp_int_t column = (mp_uint_t)mp_arg_validate_int_range(
mp_obj_get_int(column_in), 0, (mp_int_t)common_hal_keypad_keymatrix_get_column_count(self), MP_QSTR_column);
return MP_OBJ_NEW_SMALL_INT(
(mp_int_t)common_hal_keypad_keymatrix_row_column_to_key_number(self, row, column));
}
MP_DEFINE_CONST_FUN_OBJ_3(keypad_keymatrix_row_column_to_key_number_obj, keypad_keymatrix_row_column_to_key_number);
//| events: EventQueue
//| """The `EventQueue` associated with this `Keys` object. (read-only)
//| """
//|
STATIC const mp_rom_map_elem_t keypad_keymatrix_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&keypad_keymatrix_deinit_obj) },
{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&keypad_keymatrix___exit___obj) },
{ MP_ROM_QSTR(MP_QSTR_events), MP_ROM_PTR(&keypad_generic_events_obj) },
{ MP_ROM_QSTR(MP_QSTR_key_count), MP_ROM_PTR(&keypad_generic_key_count_obj) },
{ MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&keypad_generic_reset_obj) },
{ MP_ROM_QSTR(MP_QSTR_key_number_to_row_column), MP_ROM_PTR(&keypad_keymatrix_key_number_to_row_column_obj) },
{ MP_ROM_QSTR(MP_QSTR_row_column_to_key_number), MP_ROM_PTR(&keypad_keymatrix_row_column_to_key_number_obj) },
};
STATIC MP_DEFINE_CONST_DICT(keypad_keymatrix_locals_dict, keypad_keymatrix_locals_dict_table);
const mp_obj_type_t keypad_keymatrix_type = {
{ &mp_type_type },
.name = MP_QSTR_KeyMatrix,
.make_new = keypad_keymatrix_make_new,
.locals_dict = (mp_obj_t)&keypad_keymatrix_locals_dict,
};