187 lines
8.9 KiB
C
187 lines
8.9 KiB
C
/*
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* This file is part of the Micro Python 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) 2021 Dan Halbert for Adafruit Industries
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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 "shared/runtime/context_manager_helpers.h"
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#include "py/binary.h"
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#include "py/objproperty.h"
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#include "py/runtime.h"
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#include "shared-bindings/keypad/__init__.h"
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#include "shared-bindings/keypad/Event.h"
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#include "shared-bindings/keypad/ShiftRegisterKeys.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "shared-bindings/util.h"
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//| class ShiftRegisterKeys:
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//| """Manage a set of keys attached to an incoming shift register."""
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//|
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//| def __init__(
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//| self,
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//| *,
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//| clock: microcontroller.Pin,
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//| data: microcontroller.Pin,
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//| latch: microcontroller.Pin,
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//| value_to_latch: bool = True,
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//| key_count: int,
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//| value_when_pressed: bool,
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//| interval: float = 0.020,
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//| max_events: int = 64
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//| ) -> None:
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//| """
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//| Create a `Keys` object that will scan keys attached to a parallel-in serial-out shift register
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//| like the 74HC165 or CD4021.
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//| Note that you may chain shift registers to load in as many values as you need.
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//|
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//| Key number 0 is the first (or more properly, the zero-th) bit read. In the
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//| 74HC165, this bit is labeled ``Q7``. Key number 1 will be the value of ``Q6``, etc.
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//|
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//| An `EventQueue` is created when this object is created and is available in the `events` attribute.
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//|
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//| :param microcontroller.Pin clock: The shift register clock pin.
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//| The shift register should clock on a low-to-high transition.
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//| :param microcontroller.Pin data: the incoming shift register data pin
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//| :param microcontroller.Pin latch:
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//| Pin used to latch parallel data going into the shift register.
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//| :param bool value_to_latch: Pin state to latch data being read.
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//| ``True`` if the data is latched when ``latch`` goes high
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//| ``False`` if the data is latched when ``latch`` goes low.
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//| The default is ``True``, which is how the 74HC165 operates. The CD4021 latch is the opposite.
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//| Once the data is latched, it will be shifted out by toggling the clock pin.
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//| :param int key_count: number of data lines to clock in
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//| :param bool value_when_pressed: ``True`` if the pin reads high when the key is pressed.
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//| ``False`` if the pin reads low (is grounded) when the key is pressed.
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//| :param float interval: Scan keys no more often than ``interval`` to allow for debouncing.
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//| ``interval`` is in float seconds. The default is 0.020 (20 msecs).
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//| :param int max_events: maximum size of `events` `EventQueue`:
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//| maximum number of key transition events that are saved.
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//| Must be >= 1.
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//| If a new event arrives when the queue is full, the oldest event is discarded.
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//| """
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//| ...
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STATIC mp_obj_t keypad_shiftregisterkeys_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
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#if CIRCUITPY_KEYPAD_KEYMATRIX
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keypad_shiftregisterkeys_obj_t *self = m_new_obj(keypad_shiftregisterkeys_obj_t);
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self->base.type = &keypad_shiftregisterkeys_type;
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enum { ARG_clock, ARG_data, ARG_latch, ARG_value_to_latch, ARG_key_count, ARG_value_when_pressed, ARG_interval, ARG_max_events };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_clock, MP_ARG_KW_ONLY | MP_ARG_REQUIRED | MP_ARG_OBJ },
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{ MP_QSTR_data, MP_ARG_KW_ONLY | MP_ARG_REQUIRED | MP_ARG_OBJ },
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{ MP_QSTR_latch, MP_ARG_KW_ONLY | MP_ARG_REQUIRED | MP_ARG_OBJ },
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{ MP_QSTR_value_to_latch, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = true} },
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{ MP_QSTR_key_count, MP_ARG_KW_ONLY | MP_ARG_REQUIRED | MP_ARG_INT },
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{ MP_QSTR_value_when_pressed, MP_ARG_REQUIRED | MP_ARG_KW_ONLY | MP_ARG_BOOL },
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{ MP_QSTR_interval, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
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{ MP_QSTR_max_events, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 64} },
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};
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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const mcu_pin_obj_t *clock = validate_obj_is_free_pin(args[ARG_clock].u_obj, MP_QSTR_clock);
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const mcu_pin_obj_t *data = validate_obj_is_free_pin(args[ARG_data].u_obj, MP_QSTR_data);
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const mcu_pin_obj_t *latch = validate_obj_is_free_pin(args[ARG_latch].u_obj, MP_QSTR_latch);
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const bool value_to_latch = args[ARG_value_to_latch].u_bool;
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const size_t key_count = (size_t)mp_arg_validate_int_min(args[ARG_key_count].u_int, 1, MP_QSTR_key_count);
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const bool value_when_pressed = args[ARG_value_when_pressed].u_bool;
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const mp_float_t interval =
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mp_arg_validate_obj_float_non_negative(args[ARG_interval].u_obj, 0.020f, MP_QSTR_interval);
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const size_t max_events = (size_t)mp_arg_validate_int_min(args[ARG_max_events].u_int, 1, MP_QSTR_max_events);
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common_hal_keypad_shiftregisterkeys_construct(
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self, clock, data, latch, value_to_latch, key_count, value_when_pressed, interval, max_events);
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return MP_OBJ_FROM_PTR(self);
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#else
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mp_raise_NotImplementedError_varg(translate("%q"), MP_QSTR_ShiftRegisterKeys);
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#endif
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}
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#if CIRCUITPY_KEYPAD_KEYMATRIX
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//| def deinit(self) -> None:
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//| """Stop scanning and release the pins."""
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//| ...
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STATIC mp_obj_t keypad_shiftregisterkeys_deinit(mp_obj_t self_in) {
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keypad_shiftregisterkeys_obj_t *self = MP_OBJ_TO_PTR(self_in);
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common_hal_keypad_shiftregisterkeys_deinit(self);
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return MP_ROM_NONE;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(keypad_shiftregisterkeys_deinit_obj, keypad_shiftregisterkeys_deinit);
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//| def __enter__(self) -> Keys:
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//| """No-op used by Context Managers."""
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//| ...
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// Provided by context manager helper.
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//| def __exit__(self) -> None:
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//| """Automatically deinitializes when exiting a context. See
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//| :ref:`lifetime-and-contextmanagers` for more info."""
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//| ...
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STATIC mp_obj_t keypad_shiftregisterkeys___exit__(size_t n_args, const mp_obj_t *args) {
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(void)n_args;
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common_hal_keypad_shiftregisterkeys_deinit(args[0]);
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return MP_ROM_NONE;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(keypad_shiftregisterkeys___exit___obj, 4, 4, keypad_shiftregisterkeys___exit__);
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//| def reset(self) -> None:
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//| """Reset the internal state of the scanner to assume that all keys are now released.
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//| Any key that is already pressed at the time of this call will therefore immediately cause
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//| a new key-pressed event to occur.
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//| """
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//| ...
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//| key_count: int
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//| """The number of keys that are being scanned. (read-only)
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//| """
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//| events: EventQueue
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//| """The `EventQueue` associated with this `Keys` object. (read-only)
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//| """
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//|
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STATIC const mp_rom_map_elem_t keypad_shiftregisterkeys_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&keypad_shiftregisterkeys_deinit_obj) },
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{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
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{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&keypad_shiftregisterkeys___exit___obj) },
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{ MP_ROM_QSTR(MP_QSTR_events), MP_ROM_PTR(&keypad_generic_events_obj) },
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{ MP_ROM_QSTR(MP_QSTR_key_count), MP_ROM_PTR(&keypad_generic_key_count_obj) },
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{ MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&keypad_generic_reset_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(keypad_shiftregisterkeys_locals_dict, keypad_shiftregisterkeys_locals_dict_table);
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#endif
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const mp_obj_type_t keypad_shiftregisterkeys_type = {
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{ &mp_type_type },
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.name = MP_QSTR_ShiftRegisterKeys,
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.make_new = keypad_shiftregisterkeys_make_new,
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#if CIRCUITPY_KEYPAD_KEYMATRIX
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.locals_dict = (mp_obj_t)&keypad_shiftregisterkeys_locals_dict,
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#endif
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};
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