mirror of
https://github.com/libretro/RetroArch.git
synced 2024-11-24 16:39:43 +00:00
148 lines
3.7 KiB
C
148 lines
3.7 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2013-2014 - Jason Fetters
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* Copyright (C) 2011-2017 - Daniel De Matteis
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdint.h>
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#include <string.h>
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#include <stdlib.h>
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#include <boolean.h>
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#include "joypad_connection.h"
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#include "../input_defines.h"
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struct hidpad_nesusb_data
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{
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struct pad_connection* connection;
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uint8_t data[64];
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uint32_t slot;
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uint64_t buttons;
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};
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static void* hidpad_nesusb_init(void *data, uint32_t slot, send_control_t ptr)
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{
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struct pad_connection* connection = (struct pad_connection*)data;
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struct hidpad_nesusb_data* device = (struct hidpad_nesusb_data*)
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calloc(1, sizeof(struct hidpad_nesusb_data));
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if (!device)
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return NULL;
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if (!connection)
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{
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free(device);
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return NULL;
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}
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device->connection = connection;
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device->slot = slot;
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return device;
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}
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static void hidpad_nesusb_deinit(void *data)
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{
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struct hidpad_nesusb_data *device = (struct hidpad_nesusb_data*)data;
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if (device)
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free(device);
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}
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static uint64_t hidpad_nesusb_get_buttons(void *data)
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{
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struct hidpad_nesusb_data *device = (struct hidpad_nesusb_data*)data;
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if (!device)
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return 0;
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return device->buttons;
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}
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static int16_t hidpad_nesusb_get_axis(void *data, unsigned axis)
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{
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int val;
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struct hidpad_nesusb_data *device = (struct hidpad_nesusb_data*)data;
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if (!device || axis >= 2)
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return 0;
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val = device->data[4 + axis];
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val = (val << 8) - 0x8000;
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return (abs(val) > 0x1000) ? val : 0;
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}
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static void hidpad_nesusb_packet_handler(void *data, uint8_t *packet, uint16_t size)
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{
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uint32_t i, pressed_keys;
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static const uint32_t button_mapping[17] =
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{
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NO_BTN,
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NO_BTN,
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NO_BTN,
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NO_BTN,
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RETRO_DEVICE_ID_JOYPAD_SELECT,
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RETRO_DEVICE_ID_JOYPAD_START,
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NO_BTN,
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NO_BTN,
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NO_BTN,
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NO_BTN,
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NO_BTN,
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NO_BTN,
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RETRO_DEVICE_ID_JOYPAD_B,
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RETRO_DEVICE_ID_JOYPAD_A,
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NO_BTN,
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NO_BTN,
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16, /* HOME BUTTON when pressing SELECT+START */
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};
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struct hidpad_nesusb_data *device = (struct hidpad_nesusb_data*)data;
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if (!device)
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return;
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memcpy(device->data, packet, size);
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device->buttons = 0;
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pressed_keys = device->data[7] | (device->data[6] << 8) |
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(((device->data[7] & 0x30) == 0x30) ? (1 << 16) : 0); /* SELECT+START=HOME */
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for (i = 0; i < 17; i ++)
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if (button_mapping[i] != NO_BTN)
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device->buttons |= (pressed_keys & (1 << i)) ? (UINT64_C(1) << button_mapping[i]) : 0;
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}
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static void hidpad_nesusb_set_rumble(void *data,
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enum retro_rumble_effect effect, uint16_t strength)
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{
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(void)data;
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(void)effect;
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(void)strength;
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}
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const char * hidpad_nesusb_get_name(void *data)
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{
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(void)data;
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/* For now we return a single static name */
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return "Generic NES USB Controller";
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}
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pad_connection_interface_t pad_connection_nesusb = {
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hidpad_nesusb_init,
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hidpad_nesusb_deinit,
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hidpad_nesusb_packet_handler,
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hidpad_nesusb_set_rumble,
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hidpad_nesusb_get_buttons,
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hidpad_nesusb_get_axis,
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hidpad_nesusb_get_name,
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};
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