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Add a gamepad module for handling buttons in the background. (micropython#295)
The `GamePad` singleton monitors buttons in the background to make sure a button press is never missed and debouncing happens consistently.
1 parent c478c10 commit f498167

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-2
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+422
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‎atmel-samd/Makefile

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@@ -289,6 +289,8 @@ SRC_SHARED_MODULE = \
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bitbangio/OneWire.c \
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bitbangio/SPI.c \
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busio/OneWire.c \
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gamepad/__init__.c \
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gamepad/GamePad.c \
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os/__init__.c \
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random/__init__.c \
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storage/__init__.c \

‎atmel-samd/mpconfigport.h

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@@ -152,6 +152,7 @@ extern const struct _mp_obj_module_t neopixel_write_module;
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extern const struct _mp_obj_module_t uheap_module;
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extern const struct _mp_obj_module_t ustack_module;
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extern const struct _mp_obj_module_t samd_module;
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extern const struct _mp_obj_module_t gamepad_module;
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extern const struct _mp_obj_module_t touchio_module;
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extern const struct _mp_obj_module_t usb_hid_module;
157158

@@ -171,10 +172,13 @@ extern const struct _mp_obj_module_t usb_hid_module;
171172
#define MICROPY_PY_ARRAY_SLICE_ASSIGN (1)
172173
#define MICROPY_PY_SYS_MAXSIZE (1)
173174
#define MICROPY_CPYTHON_COMPAT (1)
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// Scan gamepad every 32ms
176+
#define CIRCUITPY_GAMEPAD_TICKS 0x1f
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175178
#define EXTRA_BUILTIN_MODULES \
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{ MP_OBJ_NEW_QSTR(MP_QSTR_audioio), (mp_obj_t)&audioio_module }, \
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{ MP_OBJ_NEW_QSTR(MP_QSTR_audiobusio), (mp_obj_t)&audiobusio_module }, \
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{ MP_OBJ_NEW_QSTR(MP_QSTR_gamepad),(mp_obj_t)&gamepad_module }, \
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{ MP_OBJ_NEW_QSTR(MP_QSTR_nvm), (mp_obj_t)&cpy_nvm_module }, \
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{ MP_OBJ_NEW_QSTR(MP_QSTR_pulseio), (mp_obj_t)&pulseio_module }, \
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{ MP_OBJ_NEW_QSTR(MP_QSTR_bitbangio), (mp_obj_t)&bitbangio_module }

‎atmel-samd/tick.c

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@@ -1,4 +1,5 @@
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#include "autoreload.h"
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#include "shared-module/gamepad/__init__.h"
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#include "tick.h"
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@@ -17,6 +18,11 @@ static void ms_tick(struct tc_module *const module_inst) {
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#ifdef CIRCUITPY_AUTORELOAD_DELAY_MS
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autoreload_tick();
1920
#endif
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#ifdef CIRCUITPY_GAMEPAD_TICKS
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if (!(ticks_ms & CIRCUITPY_GAMEPAD_TICKS)) {
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gamepad_tick();
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}
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#endif
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}
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void tick_init() {

‎shared-bindings/gamepad/GamePad.c

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/*
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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) 2016 Radomir Dopieralski 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 "py/obj.h"
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "shared-module/gamepad/GamePad.h"
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#include "GamePad.h"
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gamepad_obj_t* gamepad_singleton = NULL;
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//| .. currentmodule:: gamepad
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//|
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//| :class:`GamePad` -- Scan buttons for presses
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//| ============================================
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//|
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//| Usage::
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//|
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//| import board
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//| import digitalio
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//| import gamepad
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//| import time
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//|
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//| B_UP = 1 << 0
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//| B_DOWN = 1 << 1
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//|
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//|
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//| pad = gamepad.GamePad(
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//| digitalio.DigitalInOut(board.D0),
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//| digitalio.DigitalInOut(board.D1),
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//| )
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//|
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//| y = 0
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//| while True:
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//| buttons = pad.get_pressed()
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//| if buttons & B_UP:
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//| y -= 1
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//| print(y)
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//| elif buttons & B_DOWN:
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//| y += 1
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//| print(y)
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//| time.sleep(0.1)
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//| while pad.get_pressed():
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//| # Wait for all buttons to be released.
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//| time.sleep(0.1)
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//|
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//| .. class:: GamePad([b1[, b2[, b3[, b4[, b5[, b6[, b7[, b8]]]]]]]])
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//|
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//| Initializes button scanning routines.
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//|
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//| The ``b1``-``b8`` parameters are ``DigitalInOut`` objects, which
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//| immediately get switched to input with a pull-up, and then scanned
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//| regularly for button presses. The order is the same as the order of
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//| bits returned by the ``get_pressed`` function. You can re-initialize
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//| it with different keys, then the new object will replace the previous
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//| one.
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//|
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//| The basic feature required here is the ability to poll the keys at
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//| regular intervals (so that de-bouncing is consistent) and fast enough
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//| (so that we don't miss short button presses) while at the same time
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//| letting the user code run normally, call blocking functions and wait
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//| on delays.
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//|
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//| They button presses are accumulated, until the ``get_pressed`` method
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//| is called, at which point the button state is cleared, and the new
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//| button presses start to be recorded.
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//|
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STATIC mp_obj_t gamepad_make_new(const mp_obj_type_t *type, size_t n_args,
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size_t n_kw, const mp_obj_t *args) {
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if (!gamepad_singleton) {
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gamepad_singleton = m_new_obj(gamepad_obj_t);
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gamepad_singleton->base.type = &gamepad_type;
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}
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gamepad_init(n_args, args);
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return MP_OBJ_FROM_PTR(gamepad_singleton);
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}
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//| .. method:: get_pressed()
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//|
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//| Get the status of buttons pressed since the last call and clear it.
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//|
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//| Returns an 8-bit number, with bits that correspond to buttons,
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//| which have been pressed (or held down) since the last call to this
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//| function set to 1, and the remaining bits set to 0. Then it clears
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//| the button state, so that new button presses (or buttons that are
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//| held down) can be recorded for the next call.
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//|
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STATIC mp_obj_t gamepad_get_pressed(mp_obj_t self_in) {
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gamepad_obj_t *self = MP_OBJ_TO_PTR(self_in);
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mp_obj_t gamepad = MP_OBJ_NEW_SMALL_INT(self->pressed);
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self->pressed = 0;
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return gamepad;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(gamepad_get_pressed_obj, gamepad_get_pressed);
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//| .. method:: deinit()
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//|
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//| Disable button scanning.
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//|
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STATIC mp_obj_t gamepad_deinit(mp_obj_t self_in) {
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gamepad_singleton = NULL;
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return mp_const_none;
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}
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MP_DEFINE_CONST_FUN_OBJ_1(gamepad_deinit_obj, gamepad_deinit);
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STATIC mp_obj_t gamepad_make_new(const mp_obj_type_t *type, size_t n_args,
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size_t n_kw, const mp_obj_t *args);
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STATIC const mp_rom_map_elem_t gamepad_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_get_pressed), MP_ROM_PTR(&gamepad_get_pressed_obj)},
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{ MP_OBJ_NEW_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&gamepad_deinit_obj)},
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};
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STATIC MP_DEFINE_CONST_DICT(gamepad_locals_dict, gamepad_locals_dict_table);
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const mp_obj_type_t gamepad_type = {
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{ &mp_type_type },
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.name = MP_QSTR_GamePad,
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.make_new = gamepad_make_new,
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.locals_dict = (mp_obj_dict_t*)&gamepad_locals_dict,
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};
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‎shared-bindings/gamepad/GamePad.h

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@@ -0,0 +1,33 @@
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/*
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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)
5+
*
6+
* Copyright (c) 2016 Radomir Dopieralski for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
9+
* of this software and associated documentation files (the "Software"), to deal
10+
* in the Software without restriction, including without limitation the rights
11+
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12+
* copies of the Software, and to permit persons to whom the Software is
13+
* furnished to do so, subject to the following conditions:
14+
*
15+
* The above copyright notice and this permission notice shall be included in
16+
* all copies or substantial portions of the Software.
17+
*
18+
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19+
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20+
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21+
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22+
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23+
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24+
* THE SOFTWARE.
25+
*/
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27+
28+
#ifndef MICROPY_INCLUDED_SHARED_BINDINGS_GAMEPAD_GAMEPAD_H
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#define MICROPY_INCLUDED_SHARED_BINDINGS_GAMEPAD_GAMEPAD_H
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extern const mp_obj_type_t gamepad_type;
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#endif // MICROPY_INCLUDED_SHARED_BINDINGS_GAMEPAD_GAMEPAD_H

‎shared-bindings/gamepad/__init__.c

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/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
4+
* The MIT License (MIT)
5+
*
6+
* Copyright (c) 2016 Radomir Dopieralski for Adafruit Industries
7+
*
8+
* Permission is hereby granted, free of charge, to any person obtaining a copy
9+
* of this software and associated documentation files (the "Software"), to deal
10+
* in the Software without restriction, including without limitation the rights
11+
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12+
* copies of the Software, and to permit persons to whom the Software is
13+
* furnished to do so, subject to the following conditions:
14+
*
15+
* The above copyright notice and this permission notice shall be included in
16+
* all copies or substantial portions of the Software.
17+
*
18+
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19+
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20+
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21+
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22+
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23+
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24+
* THE SOFTWARE.
25+
*/
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "py/mphal.h"
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#include "GamePad.h"
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//| :mod:`gamepad` --- Button handling
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//| ==================================
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//|
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//| .. module:: gamepad
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//| :synopsis: Button handling
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//| :platform: SAMD21
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//|
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//| .. toctree::
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//| :maxdepth: 3
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//|
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//| GamePad
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//|
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STATIC const mp_rom_map_elem_t gamepad_module_globals_table[] = {
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{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_gamepad) },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_GamePad), MP_ROM_PTR(&gamepad_type)},
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};
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STATIC MP_DEFINE_CONST_DICT(gamepad_module_globals,
49+
gamepad_module_globals_table);
50+
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const mp_obj_module_t gamepad_module = {
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.base = { &mp_type_module },
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.globals = (mp_obj_dict_t*)&gamepad_module_globals,
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};

‎shared-bindings/index.rst

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@@ -21,9 +21,10 @@ Module / Port SAMD21 SAMD21 Express ESP8266
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`board` **Yes** **Yes** **Yes**
2222
`busio` **Yes** **Yes** **Yes**
2323
`digitalio` **Yes** **Yes** **Yes**
24-
`microcontroller` **Yes** **Yes** **Yes**
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`gamepad` No **Yes** No
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`microcontroller` **Yes** **Yes** **Yes**
2526
`multiterminal` No No **Yes**
26-
`neopixel_write` **Yes** **Yes** **Yes**
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`neopixel_write` **Yes** **Yes** **Yes**
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`nvm` No **Yes** No
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`os` **Yes** **Yes** **Yes**
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`pulseio` No **Yes** No

‎shared-module/gamepad/GamePad.c

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/*
2+
* This file is part of the MicroPython project, http://micropython.org/
3+
*
4+
* The MIT License (MIT)
5+
*
6+
* Copyright (c) 2016 Radomir Dopieralski for Adafruit Industries
7+
*
8+
* Permission is hereby granted, free of charge, to any person obtaining a copy
9+
* of this software and associated documentation files (the "Software"), to deal
10+
* in the Software without restriction, including without limitation the rights
11+
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12+
* copies of the Software, and to permit persons to whom the Software is
13+
* furnished to do so, subject to the following conditions:
14+
*
15+
* The above copyright notice and this permission notice shall be included in
16+
* all copies or substantial portions of the Software.
17+
*
18+
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19+
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20+
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21+
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22+
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23+
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24+
* THE SOFTWARE.
25+
*/
26+
27+
#include <stdbool.h>
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29+
#include "__init__.h"
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#include "GamePad.h"
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#include "shared-bindings/digitalio/Pull.h"
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#include "shared-bindings/digitalio/DigitalInOut.h"
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void gamepad_init(size_t n_pins, const mp_obj_t* pins) {
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for (size_t i=0; i<8; ++i) {
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gamepad_singleton->pins[i] = NULL;
39+
}
40+
for (size_t i=0; i<n_pins; ++i) {
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digitalio_digitalinout_obj_t *pin = MP_OBJ_TO_PTR(pins[i]);
42+
gamepad_singleton->pins[i] = pin;
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common_hal_digitalio_digitalinout_switch_to_input(pin, PULL_UP);
44+
}
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gamepad_singleton->last = 0;
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}

‎shared-module/gamepad/GamePad.h

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/*
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* This file is part of the MicroPython project, http://micropython.org/
3+
*
4+
* The MIT License (MIT)
5+
*
6+
* Copyright (c) 2016 Radomir Dopieralski for Adafruit Industries
7+
*
8+
* Permission is hereby granted, free of charge, to any person obtaining a copy
9+
* of this software and associated documentation files (the "Software"), to deal
10+
* in the Software without restriction, including without limitation the rights
11+
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12+
* copies of the Software, and to permit persons to whom the Software is
13+
* furnished to do so, subject to the following conditions:
14+
*
15+
* The above copyright notice and this permission notice shall be included in
16+
* all copies or substantial portions of the Software.
17+
*
18+
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19+
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20+
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21+
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22+
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23+
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24+
* THE SOFTWARE.
25+
*/
26+
27+
#ifndef MICROPY_INCLUDED_GAMEPAD_GAMEPAD_H
28+
#define MICROPY_INCLUDED_GAMEPAD_GAMEPAD_H
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#include <stdint.h>
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32+
#include "shared-bindings/digitalio/DigitalInOut.h"
33+
34+
typedef struct {
35+
mp_obj_base_t base;
36+
digitalio_digitalinout_obj_t* pins[8];
37+
volatile uint8_t last;
38+
volatile uint8_t pressed;
39+
} gamepad_obj_t;
40+
41+
extern gamepad_obj_t* gamepad_singleton;
42+
43+
void gamepad_init(size_t n_pins, const mp_obj_t* pins);
44+
45+
#endif // MICROPY_INCLUDED_GAMEPAD_GAMEPAD_H

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