circuitpython/shared-module/gamepad/GamePad.c
Radomir Dopieralski 240678e714 Avoid uninitialized gamepad on exception
Raise exceptions before the gamepad_singleton is created.
Also, use mp_raise for creating the exceptions.
2018-05-23 21:39:06 +02:00

59 lines
2.3 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Radomir Dopieralski for Adafruit Industries
*
* 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 <stdbool.h>
#include "__init__.h"
#include "GamePad.h"
#include "shared-bindings/digitalio/Pull.h"
#include "shared-bindings/digitalio/DigitalInOut.h"
#include "shared-bindings/util.h"
void gamepad_init(size_t n_pins, const mp_obj_t* pins) {
for (size_t i = 0; i < 8; ++i) {
gamepad_singleton->pins[i] = NULL;
}
gamepad_singleton->pulls = 0;
for (size_t i = 0; i < n_pins; ++i) {
digitalio_digitalinout_obj_t *pin = MP_OBJ_TO_PTR(pins[i]);
digitalio_direction_t direction = common_hal_digitalio_digitalinout_get_direction(pin);
if (direction != DIRECTION_INPUT) {
common_hal_digitalio_digitalinout_switch_to_input(pin, PULL_UP);
}
digitalio_pull_t pull = common_hal_digitalio_digitalinout_get_pull(pin);
if (pull == PULL_NONE) {
common_hal_digitalio_digitalinout_set_pull(pin, PULL_UP);
}
if (pull != PULL_DOWN) {
gamepad_singleton->pulls |= 1 << i;
}
gamepad_singleton->pins[i] = pin;
}
gamepad_singleton->last = 0;
}