370 lines
16 KiB
C
370 lines
16 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) 2013, 2014 Damien P. George
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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 <stdint.h>
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#include <string.h>
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#include "lib/utils/context_manager_helpers.h"
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#include "py/nlr.h"
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#include "py/objtype.h"
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#include "py/objproperty.h"
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "shared-bindings/digitalio/DigitalInOut.h"
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#include "shared-bindings/digitalio/Direction.h"
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#include "shared-bindings/digitalio/DriveMode.h"
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#include "shared-bindings/digitalio/Pull.h"
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#include "shared-bindings/util.h"
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//| .. currentmodule:: digitalio
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//|
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//| :class:`DigitalInOut` -- digital input and output
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//| =========================================================
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//|
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//| A DigitalInOut is used to digitally control I/O pins. For analog control of
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//| a pin, see the :py:class:`~digitalio.AnalogIn` and
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//| :py:class:`~digitalio.AnalogOut` classes.
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//|
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//| .. class:: DigitalInOut(pin)
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//|
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//| Create a new DigitalInOut object associated with the pin. Defaults to input
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//| with no pull. Use :py:meth:`switch_to_input` and
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//| :py:meth:`switch_to_output` to change the direction.
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//|
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//| :param ~microcontroller.Pin pin: The pin to control
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//|
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STATIC mp_obj_t digitalio_digitalinout_make_new(const mp_obj_type_t *type,
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mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 1, 1, true);
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digitalio_digitalinout_obj_t *self = m_new_obj(digitalio_digitalinout_obj_t);
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self->base.type = &digitalio_digitalinout_type;
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assert_pin(args[0], false);
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mcu_pin_obj_t *pin = MP_OBJ_TO_PTR(args[0]);
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assert_pin_free(pin);
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common_hal_digitalio_digitalinout_construct(self, pin);
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return (mp_obj_t)self;
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}
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//| .. method:: deinit()
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//|
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//| Turn off the DigitalInOut and release the pin for other use.
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//|
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STATIC mp_obj_t digitalio_digitalinout_obj_deinit(mp_obj_t self_in) {
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digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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common_hal_digitalio_digitalinout_deinit(self);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(digitalio_digitalinout_deinit_obj, digitalio_digitalinout_obj_deinit);
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//| .. method:: __enter__()
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//|
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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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//| .. method:: __exit__()
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//|
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//| Automatically deinitializes the hardware 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 digitalio_digitalinout_obj___exit__(size_t n_args, const mp_obj_t *args) {
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(void)n_args;
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common_hal_digitalio_digitalinout_deinit(args[0]);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(digitalio_digitalinout_obj___exit___obj, 4, 4, digitalio_digitalinout_obj___exit__);
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//|
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//| .. method:: switch_to_output(value=False, drive_mode=digitalio.DriveMode.PUSH_PULL)
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//|
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//| Set the drive mode and value and then switch to writing out digital
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//| values.
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//|
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//| :param bool value: default value to set upon switching
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//| :param ~digitalio.DriveMode drive_mode: drive mode for the output
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//|
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STATIC mp_obj_t digitalio_digitalinout_switch_to_output(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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enum { ARG_value, ARG_drive_mode };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_value, MP_ARG_BOOL, {.u_bool = false} },
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{ MP_QSTR_drive_mode, MP_ARG_OBJ, {.u_rom_obj = &digitalio_drive_mode_push_pull_obj} },
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};
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digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
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raise_error_if_deinited(common_hal_digitalio_digitalinout_deinited(self));
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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enum digitalio_drive_mode_t drive_mode = DRIVE_MODE_PUSH_PULL;
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if (args[ARG_drive_mode].u_rom_obj == &digitalio_drive_mode_open_drain_obj) {
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drive_mode = DRIVE_MODE_OPEN_DRAIN;
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}
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// do the transfer
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common_hal_digitalio_digitalinout_switch_to_output(self, args[ARG_value].u_bool, drive_mode);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_KW(digitalio_digitalinout_switch_to_output_obj, 1, digitalio_digitalinout_switch_to_output);
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//| .. method:: switch_to_input(pull=None)
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//|
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//| Set the pull and then switch to read in digital values.
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//|
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//| :param Pull pull: pull configuration for the input
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//|
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//| Example usage::
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//|
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//| import digitalio
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//| import board
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//|
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//| switch = digitalio.DigitalInOut(board.SLIDE_SWITCH)
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//| switch.switch_to_input(pull=digitalio.Pull.UP)
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//| # Or, after switch_to_input
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//| switch.pull = digitalio.Pull.UP
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//| print(switch.value)
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//|
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STATIC mp_obj_t digitalio_digitalinout_switch_to_input(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
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enum { ARG_pull };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_pull, MP_ARG_OBJ, {.u_rom_obj = mp_const_none} },
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};
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digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
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raise_error_if_deinited(common_hal_digitalio_digitalinout_deinited(self));
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mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
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enum digitalio_pull_t pull = PULL_NONE;
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if (args[ARG_pull].u_rom_obj == &digitalio_pull_up_obj) {
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pull = PULL_UP;
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}else if (args[ARG_pull].u_rom_obj == &digitalio_pull_down_obj) {
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pull = PULL_DOWN;
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}
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// do the transfer
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common_hal_digitalio_digitalinout_switch_to_input(self, pull);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_KW(digitalio_digitalinout_switch_to_input_obj, 1, digitalio_digitalinout_switch_to_input);
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//| .. attribute:: direction
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//|
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//| The direction of the pin.
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//|
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//| Setting this will use the defaults from the corresponding
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//| :py:meth:`switch_to_input` or :py:meth:`switch_to_output` method. If
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//| you want to set pull, value or drive mode prior to switching, then use
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//| those methods instead.
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//|
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typedef struct {
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mp_obj_base_t base;
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} digitalio_digitalio_direction_obj_t;
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extern const digitalio_digitalio_direction_obj_t digitalio_digitalio_direction_in_obj;
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extern const digitalio_digitalio_direction_obj_t digitalio_digitalio_direction_out_obj;
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STATIC mp_obj_t digitalio_digitalinout_obj_get_direction(mp_obj_t self_in) {
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digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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raise_error_if_deinited(common_hal_digitalio_digitalinout_deinited(self));
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enum digitalio_direction_t direction = common_hal_digitalio_digitalinout_get_direction(self);
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if (direction == DIRECTION_INPUT) {
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return (mp_obj_t)&digitalio_direction_input_obj;
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}
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return (mp_obj_t)&digitalio_direction_output_obj;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(digitalio_digitalinout_get_direction_obj, digitalio_digitalinout_obj_get_direction);
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STATIC mp_obj_t digitalio_digitalinout_obj_set_direction(mp_obj_t self_in, mp_obj_t value) {
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digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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raise_error_if_deinited(common_hal_digitalio_digitalinout_deinited(self));
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if (value == &digitalio_direction_input_obj) {
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common_hal_digitalio_digitalinout_switch_to_input(self, PULL_NONE);
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} else if (value == &digitalio_direction_output_obj) {
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common_hal_digitalio_digitalinout_switch_to_output(self, false, DRIVE_MODE_PUSH_PULL);
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} else {
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mp_raise_ValueError("Invalid direction.");
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}
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_2(digitalio_digitalinout_set_direction_obj, digitalio_digitalinout_obj_set_direction);
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const mp_obj_property_t digitalio_digitalio_direction_obj = {
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.base.type = &mp_type_property,
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.proxy = {(mp_obj_t)&digitalio_digitalinout_get_direction_obj,
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(mp_obj_t)&digitalio_digitalinout_set_direction_obj,
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(mp_obj_t)&mp_const_none_obj},
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};
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//| .. attribute:: value
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//|
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//| The digital logic level of the pin.
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//|
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STATIC mp_obj_t digitalio_digitalinout_obj_get_value(mp_obj_t self_in) {
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digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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raise_error_if_deinited(common_hal_digitalio_digitalinout_deinited(self));
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bool value = common_hal_digitalio_digitalinout_get_value(self);
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return mp_obj_new_bool(value);
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}
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MP_DEFINE_CONST_FUN_OBJ_1(digitalio_digitalinout_get_value_obj, digitalio_digitalinout_obj_get_value);
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STATIC mp_obj_t digitalio_digitalinout_obj_set_value(mp_obj_t self_in, mp_obj_t value) {
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digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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raise_error_if_deinited(common_hal_digitalio_digitalinout_deinited(self));
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if (common_hal_digitalio_digitalinout_get_direction(self) == DIRECTION_INPUT) {
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mp_raise_AttributeError("Cannot set value when direction is input.");
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return mp_const_none;
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}
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common_hal_digitalio_digitalinout_set_value(self, mp_obj_is_true(value));
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_2(digitalio_digitalinout_set_value_obj, digitalio_digitalinout_obj_set_value);
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const mp_obj_property_t digitalio_digitalinout_value_obj = {
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.base.type = &mp_type_property,
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.proxy = {(mp_obj_t)&digitalio_digitalinout_get_value_obj,
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(mp_obj_t)&digitalio_digitalinout_set_value_obj,
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(mp_obj_t)&mp_const_none_obj},
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};
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//| .. attribute:: drive_mode
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//|
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//| Get or set the pin drive mode.
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//|
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STATIC mp_obj_t digitalio_digitalinout_obj_get_drive_mode(mp_obj_t self_in) {
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digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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raise_error_if_deinited(common_hal_digitalio_digitalinout_deinited(self));
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if (common_hal_digitalio_digitalinout_get_direction(self) == DIRECTION_INPUT) {
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mp_raise_AttributeError("Drive mode not used when direction is input.");
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return mp_const_none;
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}
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enum digitalio_drive_mode_t drive_mode = common_hal_digitalio_digitalinout_get_drive_mode(self);
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if (drive_mode == DRIVE_MODE_PUSH_PULL) {
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return (mp_obj_t)&digitalio_drive_mode_push_pull_obj;
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}
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return (mp_obj_t)&digitalio_drive_mode_open_drain_obj;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(digitalio_digitalinout_get_drive_mode_obj, digitalio_digitalinout_obj_get_drive_mode);
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STATIC mp_obj_t digitalio_digitalinout_obj_set_drive_mode(mp_obj_t self_in, mp_obj_t drive_mode) {
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digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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raise_error_if_deinited(common_hal_digitalio_digitalinout_deinited(self));
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if (common_hal_digitalio_digitalinout_get_direction(self) == DIRECTION_INPUT) {
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mp_raise_AttributeError("Drive mode not used when direction is input.");
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return mp_const_none;
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}
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enum digitalio_drive_mode_t c_drive_mode = DRIVE_MODE_PUSH_PULL;
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if (drive_mode == &digitalio_drive_mode_open_drain_obj) {
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c_drive_mode = DRIVE_MODE_OPEN_DRAIN;
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}
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common_hal_digitalio_digitalinout_set_drive_mode(self, c_drive_mode);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_2(digitalio_digitalinout_set_drive_mode_obj, digitalio_digitalinout_obj_set_drive_mode);
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const mp_obj_property_t digitalio_digitalio_drive_mode_obj = {
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.base.type = &mp_type_property,
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.proxy = {(mp_obj_t)&digitalio_digitalinout_get_drive_mode_obj,
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(mp_obj_t)&digitalio_digitalinout_set_drive_mode_obj,
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(mp_obj_t)&mp_const_none_obj},
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};
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//| .. attribute:: pull
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//|
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//| Get or set the pin pull. Values may be `digitalio.Pull.UP`,
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//| `digitalio.Pull.DOWN` or ``None``.
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//|
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//| :raises AttributeError: if the direction is ~`digitalio.Direction.OUTPUT`.
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//|
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STATIC mp_obj_t digitalio_digitalinout_obj_get_pull(mp_obj_t self_in) {
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digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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raise_error_if_deinited(common_hal_digitalio_digitalinout_deinited(self));
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if (common_hal_digitalio_digitalinout_get_direction(self) == DIRECTION_OUTPUT) {
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mp_raise_AttributeError("Pull not used when direction is output.");
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return mp_const_none;
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}
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enum digitalio_pull_t pull = common_hal_digitalio_digitalinout_get_pull(self);
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if (pull == PULL_UP) {
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return (mp_obj_t)&digitalio_pull_up_obj;
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} else if (pull == PULL_DOWN) {
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return (mp_obj_t)&digitalio_pull_down_obj;
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}
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return (mp_obj_t)&mp_const_none_obj;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(digitalio_digitalinout_get_pull_obj, digitalio_digitalinout_obj_get_pull);
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STATIC mp_obj_t digitalio_digitalinout_obj_set_pull(mp_obj_t self_in, mp_obj_t pull_obj) {
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digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
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raise_error_if_deinited(common_hal_digitalio_digitalinout_deinited(self));
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if (common_hal_digitalio_digitalinout_get_direction(self) == DIRECTION_OUTPUT) {
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mp_raise_AttributeError("Pull not used when direction is output.");
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return mp_const_none;
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}
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enum digitalio_pull_t pull = PULL_NONE;
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if (pull_obj == &digitalio_pull_up_obj) {
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pull = PULL_UP;
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} else if (pull_obj == &digitalio_pull_down_obj) {
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pull = PULL_DOWN;
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} else if (pull_obj != mp_const_none) {
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mp_raise_ValueError("Unsupported pull value.");
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}
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common_hal_digitalio_digitalinout_set_pull(self, pull);
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_2(digitalio_digitalinout_set_pull_obj, digitalio_digitalinout_obj_set_pull);
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const mp_obj_property_t digitalio_digitalio_pull_obj = {
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.base.type = &mp_type_property,
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.proxy = {(mp_obj_t)&digitalio_digitalinout_get_pull_obj,
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(mp_obj_t)&digitalio_digitalinout_set_pull_obj,
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(mp_obj_t)&mp_const_none_obj},
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};
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STATIC const mp_rom_map_elem_t digitalio_digitalinout_locals_dict_table[] = {
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// instance methods
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{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&digitalio_digitalinout_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(&digitalio_digitalinout_obj___exit___obj) },
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{ MP_ROM_QSTR(MP_QSTR_switch_to_output), MP_ROM_PTR(&digitalio_digitalinout_switch_to_output_obj) },
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{ MP_ROM_QSTR(MP_QSTR_switch_to_input), MP_ROM_PTR(&digitalio_digitalinout_switch_to_input_obj) },
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// Properties
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{ MP_ROM_QSTR(MP_QSTR_direction), MP_ROM_PTR(&digitalio_digitalio_direction_obj) },
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{ MP_ROM_QSTR(MP_QSTR_value), MP_ROM_PTR(&digitalio_digitalinout_value_obj) },
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{ MP_ROM_QSTR(MP_QSTR_drive_mode), MP_ROM_PTR(&digitalio_digitalio_drive_mode_obj) },
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{ MP_ROM_QSTR(MP_QSTR_pull), MP_ROM_PTR(&digitalio_digitalio_pull_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(digitalio_digitalinout_locals_dict, digitalio_digitalinout_locals_dict_table);
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const mp_obj_type_t digitalio_digitalinout_type = {
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{ &mp_type_type },
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.name = MP_QSTR_DigitalInOut,
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.make_new = digitalio_digitalinout_make_new,
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.locals_dict = (mp_obj_t)&digitalio_digitalinout_locals_dict,
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};
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