181f7d1450
Each method asserts and deasserts signal respectively. They are equivalent to .value(1) and .value(0) but conceptually simpler (and may help to avoid confusion with inverted signals, where "asserted" state means logical 0 output).
129 lines
4.2 KiB
C
129 lines
4.2 KiB
C
/*
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* This file is part of the MicroPython 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) 2017 Paul Sokolovsky
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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 "py/mpconfig.h"
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#if MICROPY_PY_MACHINE
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "extmod/virtpin.h"
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#include "extmod/machine_signal.h"
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// Signal class
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typedef struct _machine_signal_t {
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mp_obj_base_t base;
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mp_obj_t pin;
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bool inverted;
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} machine_signal_t;
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STATIC mp_obj_t signal_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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enum { ARG_pin, ARG_inverted };
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static const mp_arg_t allowed_args[] = {
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{ MP_QSTR_, MP_ARG_OBJ | MP_ARG_REQUIRED },
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{ MP_QSTR_inverted, MP_ARG_BOOL, {.u_bool = false} },
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};
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mp_arg_val_t parsed_args[MP_ARRAY_SIZE(allowed_args)];
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mp_arg_parse_all_kw_array(n_args, n_kw, args, MP_ARRAY_SIZE(allowed_args), allowed_args, parsed_args);
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machine_signal_t *o = m_new_obj(machine_signal_t);
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o->base.type = type;
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o->pin = parsed_args[ARG_pin].u_obj;
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o->inverted = parsed_args[ARG_inverted].u_bool;
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return MP_OBJ_FROM_PTR(o);
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}
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STATIC mp_uint_t signal_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_t arg, int *errcode) {
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(void)errcode;
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machine_signal_t *self = MP_OBJ_TO_PTR(self_in);
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switch (request) {
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case MP_PIN_READ: {
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return mp_virtual_pin_read(self->pin) ^ self->inverted;
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}
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case MP_PIN_WRITE: {
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mp_virtual_pin_write(self->pin, arg ^ self->inverted);
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return 0;
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}
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}
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return -1;
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}
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// fast method for getting/setting signal value
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STATIC mp_obj_t signal_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 0, 1, false);
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if (n_args == 0) {
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// get pin
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return MP_OBJ_NEW_SMALL_INT(mp_virtual_pin_read(self_in));
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} else {
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// set pin
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mp_virtual_pin_write(self_in, mp_obj_is_true(args[0]));
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return mp_const_none;
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}
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}
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STATIC mp_obj_t signal_value(size_t n_args, const mp_obj_t *args) {
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return signal_call(args[0], n_args - 1, 0, args + 1);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(signal_value_obj, 1, 2, signal_value);
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STATIC mp_obj_t signal_on(mp_obj_t self_in) {
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mp_virtual_pin_write(self_in, 1);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(signal_on_obj, signal_on);
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STATIC mp_obj_t signal_off(mp_obj_t self_in) {
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mp_virtual_pin_write(self_in, 0);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(signal_off_obj, signal_off);
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STATIC const mp_rom_map_elem_t signal_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_value), MP_ROM_PTR(&signal_value_obj) },
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{ MP_ROM_QSTR(MP_QSTR_on), MP_ROM_PTR(&signal_on_obj) },
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{ MP_ROM_QSTR(MP_QSTR_off), MP_ROM_PTR(&signal_off_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(signal_locals_dict, signal_locals_dict_table);
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STATIC const mp_pin_p_t signal_pin_p = {
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.ioctl = signal_ioctl,
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};
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const mp_obj_type_t machine_signal_type = {
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{ &mp_type_type },
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.name = MP_QSTR_Signal,
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.make_new = signal_make_new,
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.call = signal_call,
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.protocol = &signal_pin_p,
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.locals_dict = (void*)&signal_locals_dict,
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};
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#endif // MICROPY_PY_MACHINE
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