circuitpython/shared-bindings/digitalio/DigitalInOut.c

379 lines
16 KiB
C

/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George
*
* 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 <stdint.h>
#include <string.h>
#include "shared/runtime/context_manager_helpers.h"
#include "py/nlr.h"
#include "py/objtype.h"
#include "py/objproperty.h"
#include "py/runtime.h"
#include "py/mphal.h"
#include "shared-bindings/microcontroller/Pin.h"
#include "shared-bindings/digitalio/DigitalInOut.h"
#include "shared-bindings/digitalio/Direction.h"
#include "shared-bindings/digitalio/DriveMode.h"
#include "shared-bindings/digitalio/Pull.h"
#include "shared-bindings/util.h"
#if CIRCUITPY_CYW43
#include "bindings/cyw43/__init__.h"
#endif
STATIC void check_result(digitalinout_result_t result) {
switch (result) {
case DIGITALINOUT_OK:
return;
case DIGITALINOUT_PIN_BUSY:
mp_raise_ValueError_varg(translate("%q in use"), MP_QSTR_Pin);
#if CIRCUITPY_DIGITALIO_HAVE_INPUT_ONLY
case DIGITALINOUT_INPUT_ONLY:
mp_raise_ValueError_varg(translate("Invalid %q"), MP_QSTR_direction);
#endif
#if CIRCUITPY_DIGITALIO_HAVE_INVALID_PULL
case DIGITALINOUT_INVALID_PULL:
mp_raise_ValueError_varg(translate("Invalid %q"), MP_QSTR_pull);
#endif
#if CIRCUITPY_DIGITALIO_HAVE_INVALID_DRIVE_MODE
case DIGITALINOUT_INVALID_DRIVE_MODE:
mp_raise_ValueError_varg(translate("Invalid %q"), MP_QSTR_drive_mode);
#endif
}
}
MP_WEAK const mcu_pin_obj_t *common_hal_digitalio_validate_pin(mp_obj_t obj) {
return validate_obj_is_free_pin(obj, MP_QSTR_pin);
}
//| class DigitalInOut:
//| """Digital input and output
//|
//| A DigitalInOut is used to digitally control I/O pins. For analog control of
//| a pin, see the :py:class:`analogio.AnalogIn` and
//| :py:class:`analogio.AnalogOut` classes."""
//|
//| def __init__(self, pin: microcontroller.Pin) -> None:
//| """Create a new DigitalInOut object associated with the pin. Defaults to input
//| with no pull. Use :py:meth:`switch_to_input` and
//| :py:meth:`switch_to_output` to change the direction.
//|
//| :param ~microcontroller.Pin pin: The pin to control"""
//| ...
STATIC mp_obj_t digitalio_digitalinout_make_new(const mp_obj_type_t *type,
size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 1, 1, false);
digitalio_digitalinout_obj_t *self = mp_obj_malloc(digitalio_digitalinout_obj_t, &digitalio_digitalinout_type);
const mcu_pin_obj_t *pin = common_hal_digitalio_validate_pin(args[0]);
common_hal_digitalio_digitalinout_construct(self, pin);
return MP_OBJ_FROM_PTR(self);
}
//| def deinit(self) -> None:
//| """Turn off the DigitalInOut and release the pin for other use."""
//| ...
STATIC mp_obj_t digitalio_digitalinout_obj_deinit(mp_obj_t self_in) {
digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
common_hal_digitalio_digitalinout_deinit(self);
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_1(digitalio_digitalinout_deinit_obj, digitalio_digitalinout_obj_deinit);
//| def __enter__(self) -> DigitalInOut:
//| """No-op used by Context Managers."""
//| ...
// Provided by context manager helper.
//| def __exit__(self) -> None:
//| """Automatically deinitializes the hardware when exiting a context. See
//| :ref:`lifetime-and-contextmanagers` for more info."""
//| ...
STATIC mp_obj_t digitalio_digitalinout_obj___exit__(size_t n_args, const mp_obj_t *args) {
(void)n_args;
common_hal_digitalio_digitalinout_deinit(MP_OBJ_TO_PTR(args[0]));
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(digitalio_digitalinout_obj___exit___obj, 4, 4, digitalio_digitalinout_obj___exit__);
STATIC inline void check_for_deinit(digitalio_digitalinout_obj_t *self) {
if (common_hal_digitalio_digitalinout_deinited(self)) {
raise_deinited_error();
}
}
//| def switch_to_output(
//| self, value: bool = False, drive_mode: DriveMode = DriveMode.PUSH_PULL
//| ) -> None:
//| """Set the drive mode and value and then switch to writing out digital
//| values.
//|
//| :param bool value: default value to set upon switching
//| :param ~digitalio.DriveMode drive_mode: drive mode for the output
//| """
//| ...
STATIC mp_obj_t digitalio_digitalinout_switch_to_output(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_value, ARG_drive_mode };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_value, MP_ARG_BOOL, {.u_bool = false} },
{ MP_QSTR_drive_mode, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_PTR(&digitalio_drive_mode_push_pull_obj)} },
};
digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
check_for_deinit(self);
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
digitalio_drive_mode_t drive_mode = DRIVE_MODE_PUSH_PULL;
if (args[ARG_drive_mode].u_rom_obj == MP_ROM_PTR(&digitalio_drive_mode_open_drain_obj)) {
drive_mode = DRIVE_MODE_OPEN_DRAIN;
}
// do the transfer
check_result(common_hal_digitalio_digitalinout_switch_to_output(self, args[ARG_value].u_bool, drive_mode));
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(digitalio_digitalinout_switch_to_output_obj, 1, digitalio_digitalinout_switch_to_output);
//| def switch_to_input(self, pull: Optional[Pull] = None) -> None:
//| """Set the pull and then switch to read in digital values.
//|
//| :param Pull pull: pull configuration for the input
//|
//| Example usage::
//|
//| import digitalio
//| import board
//|
//| switch = digitalio.DigitalInOut(board.SLIDE_SWITCH)
//| switch.switch_to_input(pull=digitalio.Pull.UP)
//| # Or, after switch_to_input
//| switch.pull = digitalio.Pull.UP
//| print(switch.value)"""
//| ...
STATIC mp_obj_t digitalio_digitalinout_switch_to_input(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
enum { ARG_pull };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_pull, MP_ARG_OBJ, {.u_rom_obj = mp_const_none} },
};
digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]);
check_for_deinit(self);
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
check_result(common_hal_digitalio_digitalinout_switch_to_input(self, validate_pull(args[ARG_pull].u_rom_obj, MP_QSTR_pull)));
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_KW(digitalio_digitalinout_switch_to_input_obj, 1, digitalio_digitalinout_switch_to_input);
//| direction: Direction
//| """The direction of the pin.
//|
//| Setting this will use the defaults from the corresponding
//| :py:meth:`switch_to_input` or :py:meth:`switch_to_output` method. If
//| you want to set pull, value or drive mode prior to switching, then use
//| those methods instead."""
typedef struct {
mp_obj_base_t base;
} digitalio_digitalio_direction_obj_t;
extern const digitalio_digitalio_direction_obj_t digitalio_digitalio_direction_in_obj;
extern const digitalio_digitalio_direction_obj_t digitalio_digitalio_direction_out_obj;
STATIC mp_obj_t digitalio_digitalinout_obj_get_direction(mp_obj_t self_in) {
digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
digitalio_direction_t direction = common_hal_digitalio_digitalinout_get_direction(self);
if (direction == DIRECTION_INPUT) {
return (mp_obj_t)&digitalio_direction_input_obj;
}
return (mp_obj_t)&digitalio_direction_output_obj;
}
MP_DEFINE_CONST_FUN_OBJ_1(digitalio_digitalinout_get_direction_obj, digitalio_digitalinout_obj_get_direction);
STATIC mp_obj_t digitalio_digitalinout_obj_set_direction(mp_obj_t self_in, mp_obj_t value) {
digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
if (value == MP_ROM_PTR(&digitalio_direction_input_obj)) {
check_result(common_hal_digitalio_digitalinout_switch_to_input(self, PULL_NONE));
} else if (value == MP_ROM_PTR(&digitalio_direction_output_obj)) {
check_result(common_hal_digitalio_digitalinout_switch_to_output(self, false, DRIVE_MODE_PUSH_PULL));
} else {
mp_arg_error_invalid(MP_QSTR_direction);
}
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_2(digitalio_digitalinout_set_direction_obj, digitalio_digitalinout_obj_set_direction);
MP_PROPERTY_GETSET(digitalio_digitalio_direction_obj,
(mp_obj_t)&digitalio_digitalinout_get_direction_obj,
(mp_obj_t)&digitalio_digitalinout_set_direction_obj);
//| value: bool
//| """The digital logic level of the pin."""
STATIC mp_obj_t digitalio_digitalinout_obj_get_value(mp_obj_t self_in) {
digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
bool value = common_hal_digitalio_digitalinout_get_value(self);
return mp_obj_new_bool(value);
}
MP_DEFINE_CONST_FUN_OBJ_1(digitalio_digitalinout_get_value_obj, digitalio_digitalinout_obj_get_value);
STATIC mp_obj_t digitalio_digitalinout_obj_set_value(mp_obj_t self_in, mp_obj_t value) {
digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
if (common_hal_digitalio_digitalinout_get_direction(self) == DIRECTION_INPUT) {
mp_raise_AttributeError(translate("Cannot set value when direction is input."));
return mp_const_none;
}
common_hal_digitalio_digitalinout_set_value(self, mp_obj_is_true(value));
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_2(digitalio_digitalinout_set_value_obj, digitalio_digitalinout_obj_set_value);
MP_PROPERTY_GETSET(digitalio_digitalinout_value_obj,
(mp_obj_t)&digitalio_digitalinout_get_value_obj,
(mp_obj_t)&digitalio_digitalinout_set_value_obj);
//| drive_mode: DriveMode
//| """The pin drive mode. One of:
//|
//| - `digitalio.DriveMode.PUSH_PULL`
//| - `digitalio.DriveMode.OPEN_DRAIN`"""
STATIC mp_obj_t digitalio_digitalinout_obj_get_drive_mode(mp_obj_t self_in) {
digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
if (common_hal_digitalio_digitalinout_get_direction(self) == DIRECTION_INPUT) {
mp_raise_AttributeError(translate("Drive mode not used when direction is input."));
return mp_const_none;
}
digitalio_drive_mode_t drive_mode = common_hal_digitalio_digitalinout_get_drive_mode(self);
if (drive_mode == DRIVE_MODE_PUSH_PULL) {
return (mp_obj_t)&digitalio_drive_mode_push_pull_obj;
}
return (mp_obj_t)&digitalio_drive_mode_open_drain_obj;
}
MP_DEFINE_CONST_FUN_OBJ_1(digitalio_digitalinout_get_drive_mode_obj, digitalio_digitalinout_obj_get_drive_mode);
STATIC mp_obj_t digitalio_digitalinout_obj_set_drive_mode(mp_obj_t self_in, mp_obj_t drive_mode) {
digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
if (common_hal_digitalio_digitalinout_get_direction(self) == DIRECTION_INPUT) {
mp_raise_AttributeError(translate("Drive mode not used when direction is input."));
return mp_const_none;
}
digitalio_drive_mode_t c_drive_mode = DRIVE_MODE_PUSH_PULL;
if (drive_mode == MP_ROM_PTR(&digitalio_drive_mode_open_drain_obj)) {
c_drive_mode = DRIVE_MODE_OPEN_DRAIN;
}
check_result(common_hal_digitalio_digitalinout_set_drive_mode(self, c_drive_mode));
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_2(digitalio_digitalinout_set_drive_mode_obj, digitalio_digitalinout_obj_set_drive_mode);
MP_PROPERTY_GETSET(digitalio_digitalio_drive_mode_obj,
(mp_obj_t)&digitalio_digitalinout_get_drive_mode_obj,
(mp_obj_t)&digitalio_digitalinout_set_drive_mode_obj);
//| pull: Optional[Pull]
//| """The pin pull direction. One of:
//|
//| - `digitalio.Pull.UP`
//| - `digitalio.Pull.DOWN`
//| - `None`
//|
//| :raises AttributeError: if `direction` is :py:data:`~digitalio.Direction.OUTPUT`."""
//|
STATIC mp_obj_t digitalio_digitalinout_obj_get_pull(mp_obj_t self_in) {
digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
if (common_hal_digitalio_digitalinout_get_direction(self) == DIRECTION_OUTPUT) {
mp_raise_AttributeError(translate("Pull not used when direction is output."));
return mp_const_none;
}
digitalio_pull_t pull = common_hal_digitalio_digitalinout_get_pull(self);
if (pull == PULL_UP) {
return MP_OBJ_FROM_PTR(&digitalio_pull_up_obj);
} else if (pull == PULL_DOWN) {
return MP_OBJ_FROM_PTR(&digitalio_pull_down_obj);
}
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_1(digitalio_digitalinout_get_pull_obj, digitalio_digitalinout_obj_get_pull);
STATIC mp_obj_t digitalio_digitalinout_obj_set_pull(mp_obj_t self_in, mp_obj_t pull_obj) {
digitalio_digitalinout_obj_t *self = MP_OBJ_TO_PTR(self_in);
check_for_deinit(self);
if (common_hal_digitalio_digitalinout_get_direction(self) == DIRECTION_OUTPUT) {
mp_raise_AttributeError(translate("Pull not used when direction is output."));
return mp_const_none;
}
check_result(common_hal_digitalio_digitalinout_set_pull(self, validate_pull(pull_obj, MP_QSTR_pull)));
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_2(digitalio_digitalinout_set_pull_obj, digitalio_digitalinout_obj_set_pull);
MP_PROPERTY_GETSET(digitalio_digitalio_pull_obj,
(mp_obj_t)&digitalio_digitalinout_get_pull_obj,
(mp_obj_t)&digitalio_digitalinout_set_pull_obj);
STATIC const mp_rom_map_elem_t digitalio_digitalinout_locals_dict_table[] = {
// instance methods
{ MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&digitalio_digitalinout_deinit_obj) },
{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&digitalio_digitalinout_obj___exit___obj) },
{ MP_ROM_QSTR(MP_QSTR_switch_to_output), MP_ROM_PTR(&digitalio_digitalinout_switch_to_output_obj) },
{ MP_ROM_QSTR(MP_QSTR_switch_to_input), MP_ROM_PTR(&digitalio_digitalinout_switch_to_input_obj) },
// Properties
{ MP_ROM_QSTR(MP_QSTR_direction), MP_ROM_PTR(&digitalio_digitalio_direction_obj) },
{ MP_ROM_QSTR(MP_QSTR_value), MP_ROM_PTR(&digitalio_digitalinout_value_obj) },
{ MP_ROM_QSTR(MP_QSTR_drive_mode), MP_ROM_PTR(&digitalio_digitalio_drive_mode_obj) },
{ MP_ROM_QSTR(MP_QSTR_pull), MP_ROM_PTR(&digitalio_digitalio_pull_obj) },
};
STATIC MP_DEFINE_CONST_DICT(digitalio_digitalinout_locals_dict, digitalio_digitalinout_locals_dict_table);
MP_DEFINE_CONST_OBJ_TYPE(
digitalio_digitalinout_type,
MP_QSTR_DigitalInOut,
MP_TYPE_FLAG_HAS_SPECIAL_ACCESSORS,
make_new, digitalio_digitalinout_make_new,
locals_dict, &digitalio_digitalinout_locals_dict
);
// Helper for validating digitalio.DigitalInOut arguments
digitalio_digitalinout_obj_t *assert_digitalinout(mp_obj_t obj) {
if (!mp_obj_is_type(obj, &digitalio_digitalinout_type)) {
mp_raise_TypeError(translate("argument num/types mismatch"));
}
digitalio_digitalinout_obj_t *pin = MP_OBJ_TO_PTR(obj);
check_for_deinit(pin);
return pin;
}