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Instead of being an explicit field, it's now a slot like all the other methods. This is a marginal code size improvement because most types have a make_new (100/138 on PYBV11), however it improves consistency in how types are declared, removing the special case for make_new. Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
150 lines
5.3 KiB
C
150 lines
5.3 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) 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 <stdio.h>
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "extint.h"
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#include "pin.h"
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#include "usrsw.h"
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#if MICROPY_HW_HAS_SWITCH
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/// \moduleref pyb
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/// \class Switch - switch object
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///
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/// A Switch object is used to control a push-button switch.
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///
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/// Usage:
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///
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/// sw = pyb.Switch() # create a switch object
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/// sw() # get state (True if pressed, False otherwise)
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/// sw.callback(f) # register a callback to be called when the
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/// # switch is pressed down
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/// sw.callback(None) # remove the callback
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///
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/// Example:
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///
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/// pyb.Switch().callback(lambda: pyb.LED(1).toggle())
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// this function inits the switch GPIO so that it can be used
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void switch_init0(void) {
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mp_hal_pin_config(MICROPY_HW_USRSW_PIN, MP_HAL_PIN_MODE_INPUT, MICROPY_HW_USRSW_PULL, 0);
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}
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int switch_get(void) {
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int val = ((MICROPY_HW_USRSW_PIN->gpio->IDR & MICROPY_HW_USRSW_PIN->pin_mask) != 0);
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return val == MICROPY_HW_USRSW_PRESSED;
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}
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/******************************************************************************/
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// MicroPython bindings
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typedef struct _pyb_switch_obj_t {
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mp_obj_base_t base;
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} pyb_switch_obj_t;
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STATIC const pyb_switch_obj_t pyb_switch_obj = {{&pyb_switch_type}};
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void pyb_switch_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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mp_print_str(print, "Switch()");
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}
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/// \classmethod \constructor()
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/// Create and return a switch object.
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STATIC mp_obj_t pyb_switch_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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// check arguments
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mp_arg_check_num(n_args, n_kw, 0, 0, false);
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// No need to clear the callback member: if it's already been set and registered
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// with extint then we don't want to reset that behaviour. If it hasn't been set,
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// then no extint will be called until it is set via the callback method.
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// return static switch object
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return MP_OBJ_FROM_PTR(&pyb_switch_obj);
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}
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/// \method \call()
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/// Return the switch state: `True` if pressed down, `False` otherwise.
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mp_obj_t pyb_switch_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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// get switch state
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mp_arg_check_num(n_args, n_kw, 0, 0, false);
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return switch_get() ? mp_const_true : mp_const_false;
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}
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mp_obj_t pyb_switch_value(mp_obj_t self_in) {
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(void)self_in;
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return mp_obj_new_bool(switch_get());
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_switch_value_obj, pyb_switch_value);
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STATIC mp_obj_t switch_callback(mp_obj_t line) {
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if (MP_STATE_PORT(pyb_switch_callback) != mp_const_none) {
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mp_call_function_0(MP_STATE_PORT(pyb_switch_callback));
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}
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(switch_callback_obj, switch_callback);
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/// \method callback(fun)
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/// Register the given function to be called when the switch is pressed down.
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/// If `fun` is `None`, then it disables the callback.
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mp_obj_t pyb_switch_callback(mp_obj_t self_in, mp_obj_t callback) {
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MP_STATE_PORT(pyb_switch_callback) = callback;
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// Init the EXTI each time this function is called, since the EXTI
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// may have been disabled by an exception in the interrupt, or the
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// user disabling the line explicitly.
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extint_register(MP_OBJ_FROM_PTR(MICROPY_HW_USRSW_PIN),
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MICROPY_HW_USRSW_EXTI_MODE,
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MICROPY_HW_USRSW_PULL,
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callback == mp_const_none ? mp_const_none : MP_OBJ_FROM_PTR(&switch_callback_obj),
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true);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(pyb_switch_callback_obj, pyb_switch_callback);
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STATIC const mp_rom_map_elem_t pyb_switch_locals_dict_table[] = {
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{ MP_ROM_QSTR(MP_QSTR_value), MP_ROM_PTR(&pyb_switch_value_obj) },
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{ MP_ROM_QSTR(MP_QSTR_callback), MP_ROM_PTR(&pyb_switch_callback_obj) },
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};
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STATIC MP_DEFINE_CONST_DICT(pyb_switch_locals_dict, pyb_switch_locals_dict_table);
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MP_DEFINE_CONST_OBJ_TYPE(
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pyb_switch_type,
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MP_QSTR_Switch,
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MP_TYPE_FLAG_NONE,
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make_new, pyb_switch_make_new,
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print, pyb_switch_print,
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call, pyb_switch_call,
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locals_dict, &pyb_switch_locals_dict
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);
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MP_REGISTER_ROOT_POINTER(mp_obj_t pyb_switch_callback);
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#endif // MICROPY_HW_HAS_SWITCH
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