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RetroArch/input/wiimote.c

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/*
* This file is part of iMAME4all.
*
* Copyright (C) 2010 David Valdeita (Seleuco)
*
* based on:
*
* wiiuse
*
* Written By:
* Michael Laforest < para >
* Email: < thepara (--AT--) g m a i l [--DOT--] com >
*
* Copyright 2006-2007
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* In addition, as a special exception, Seleuco
* gives permission to link the code of this program with
* the MAME library (or with modified versions of MAME that use the
* same license as MAME), and distribute linked combinations including
* the two. You must obey the GNU General Public License in all
* respects for all of the code used other than MAME. If you modify
* this file, you may extend this exception to your version of the
* file, but you are not obligated to do so. If you do not wish to
* do so, delete this exception statement from your version.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <unistd.h>
#include "../boolean.h"
#include "wiimote.h"
int wiimote_send(struct wiimote_t* wm, byte report_type, byte* msg, int len);
int wiimote_read_data(struct wiimote_t* wm, unsigned int addr, unsigned short len);
int wiimote_write_data(struct wiimote_t* wm, unsigned int addr, byte* data, byte len);
void wiimote_set_leds(struct wiimote_t* wm, int leds);
int classic_ctrl_handshake(struct wiimote_t* wm, struct classic_ctrl_t* cc, byte* data, unsigned short len);
void classic_ctrl_event(struct classic_ctrl_t* cc, byte* msg);
/**
* @brief Request the wiimote controller status.
*
* @param wm Pointer to a wiimote_t structure.
*
* Controller status includes: battery level, LED status, expansions
*/
void wiimote_status(struct wiimote_t* wm)
{
byte buf = 0;
if (!wm || !WIIMOTE_IS_CONNECTED(wm))
return;
#ifdef WIIMOTE_DBG
printf("Requested wiimote status.\n");
#endif
wiimote_send(wm, WM_CMD_CTRL_STATUS, &buf, 1);
}
void wiimote_data_report(struct wiimote_t* wm, byte type)
{
byte buf[2] = {0x0,0x0};
if (!wm || !WIIMOTE_IS_CONNECTED(wm))
return;
buf[1] = type;
//CUIDADO es un &buf?
wiimote_send(wm, WM_CMD_REPORT_TYPE, buf, 2);
}
/**
* @brief Set the enabled LEDs.
*
* @param wm Pointer to a wiimote_t structure.
* @param leds What LEDs to enable.
*
* \a leds is a bitwise or of WIIMOTE_LED_1, WIIMOTE_LED_2, WIIMOTE_LED_3, or WIIMOTE_LED_4.
*/
void wiimote_set_leds(struct wiimote_t* wm, int leds)
{
byte buf;
if (!wm || !WIIMOTE_IS_CONNECTED(wm))
return;
/* remove the lower 4 bits because they control rumble */
wm->leds = (leds & 0xF0);
buf = wm->leds;
wiimote_send(wm, WM_CMD_LED, &buf, 1);
}
/**
* @brief Find what buttons are pressed.
*
* @param wm Pointer to a wiimote_t structure.
* @param msg The message specified in the event packet.
*/
void wiimote_pressed_buttons(struct wiimote_t* wm, byte* msg)
{
short now;
/* convert to big endian */
now = BIG_ENDIAN_SHORT(*(short*)msg) & WIIMOTE_BUTTON_ALL;
/* buttons pressed now */
wm->btns = now;
}
/**
* @brief Handle data from the expansion.
*
* @param wm A pointer to a wiimote_t structure.
* @param msg The message specified in the event packet for the expansion.
*/
void wiimote_handle_expansion(struct wiimote_t* wm, byte* msg)
{
switch (wm->exp.type)
{
case EXP_CLASSIC:
classic_ctrl_event(&wm->exp.cc.classic, msg);
break;
default:
break;
}
}
/**
* @brief Get initialization data from the wiimote.
*
* @param wm Pointer to a wiimote_t structure.
* @param data unused
* @param len unused
*
* When first called for a wiimote_t structure, a request
* is sent to the wiimote for initialization information.
* This includes factory set accelerometer data.
* The handshake will be concluded when the wiimote responds
* with this data.
*/
int wiimote_handshake(struct wiimote_t* wm, byte event, byte* data, unsigned short len)
{
if (!wm) return 0;
while(1)
{
#ifdef WIIMOTE_DBG
printf("Handshake %d\n",wm->handshake_state);
#endif
switch (wm->handshake_state)
{
case 0://no ha habido nunca handshake, debemos forzar un mensaje de staus para ver que pasa.
{
WIIMOTE_ENABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE);
wiimote_set_leds(wm, WIIMOTE_LED_NONE);
/* request the status of the wiimote to see if there is an expansion */
wiimote_status(wm);
wm->handshake_state=1;
return 0;
}
case 1://estamos haciendo handshake o bien se necesita iniciar un nuevo handshake ya que se inserta(quita una expansion.
{
int attachment = 0;
if(event != WM_RPT_CTRL_STATUS)
return 0;
/* is an attachment connected to the expansion port? */
if ((data[2] & WM_CTRL_STATUS_BYTE1_ATTACHMENT) == WM_CTRL_STATUS_BYTE1_ATTACHMENT)
attachment = 1;
#ifdef WIIMOTE_DBG
printf("attachment %d %d\n",attachment,WIIMOTE_IS_SET(wm, WIIMOTE_STATE_EXP));
#endif
/* expansion port */
if (attachment && !WIIMOTE_IS_SET(wm, WIIMOTE_STATE_EXP))
{
WIIMOTE_ENABLE_STATE(wm, WIIMOTE_STATE_EXP);
/* send the initialization code for the attachment */
#ifdef WIIMOTE_DBG
printf("haciendo el handshake de la expansion\n");
#endif
if(WIIMOTE_IS_SET(wm,WIIMOTE_STATE_HANDSHAKE_COMPLETE))
{
#ifdef WIIMOTE_DBG
printf("rehandshake\n");
#endif
WIIMOTE_DISABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE_COMPLETE);
WIIMOTE_ENABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE);//forzamos un handshake por si venimos de un hanshake completo
}
byte buf;
//Old way. initialize the extension was by writing the single encryption byte 0x00 to 0x(4)A40040
//buf = 0x00;
//wiimote_write_data(wm, WM_EXP_MEM_ENABLE, &buf, 1);
//NEW WAY 0x55 to 0x(4)A400F0, then writing 0x00 to 0x(4)A400FB. (support clones)
buf = 0x55;
wiimote_write_data(wm, 0x04A400F0, &buf, 1);
usleep(100000);
buf = 0x00;
wiimote_write_data(wm, 0x04A400FB, &buf, 1);
//check extension type!
usleep(100000);
wiimote_read_data(wm, WM_EXP_MEM_CALIBR+220, 4);
//wiimote_read_data(wm, WM_EXP_MEM_CALIBR, EXP_HANDSHAKE_LEN);
wm->handshake_state = 4;
return 0;
}
else if (!attachment && WIIMOTE_IS_SET(wm, WIIMOTE_STATE_EXP))
{
/* attachment removed */
WIIMOTE_DISABLE_STATE(wm, WIIMOTE_STATE_EXP);
wm->exp.type = EXP_NONE;
if(WIIMOTE_IS_SET(wm,WIIMOTE_STATE_HANDSHAKE_COMPLETE))
{
#ifdef WIIMOTE_DBG
printf("rehandshake\n");
#endif
WIIMOTE_DISABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE_COMPLETE);
WIIMOTE_ENABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE);//forzamos un handshake por si venimos de un hanshake completo
}
}
if(!attachment && WIIMOTE_IS_SET(wm,WIIMOTE_STATE_HANDSHAKE))
{
wm->handshake_state = 2;
continue;
}
return 0;
}
case 2://find handshake no expansion
{
#ifdef WIIMOTE_DBG
printf("Finalizado HANDSHAKE SIN EXPANSION\n");
#endif
wiimote_data_report(wm,WM_RPT_BTN);
wm->handshake_state = 6;
continue;
}
case 3://find handshake expansion
{
#ifdef WIIMOTE_DBG
printf("Finalizado HANDSHAKE CON EXPANSION\n");
#endif
wiimote_data_report(wm,WM_RPT_BTN_EXP);
wm->handshake_state = 6;
continue;
}
case 4:
{
if(event != WM_RPT_READ)
return 0;
int id = BIG_ENDIAN_LONG(*(int*)(data));
#ifdef WIIMOTE_DBG
printf("Expansion id=0x%04x\n",id);
#endif
if(id!=/*EXP_ID_CODE_CLASSIC_CONTROLLER*/0xa4200101)
{
wm->handshake_state = 2;
//WIIMOTE_DISABLE_STATE(wm, WIIMOTE_STATE_EXP);
continue;
}
else
{
usleep(100000);
wiimote_read_data(wm, WM_EXP_MEM_CALIBR, 16);//pedimos datos de calibracion del JOY!
wm->handshake_state = 5;
}
return 0;
}
case 5:
{
if(event != WM_RPT_READ)
return 0;
classic_ctrl_handshake(wm, &wm->exp.cc.classic, data,len);
wm->handshake_state = 3;
continue;
}
case 6:
{
WIIMOTE_DISABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE);
WIIMOTE_ENABLE_STATE(wm, WIIMOTE_STATE_HANDSHAKE_COMPLETE);
wm->handshake_state = 1;
if(wm->unid==0)
wiimote_set_leds(wm, WIIMOTE_LED_1);
else if(wm->unid==1)
wiimote_set_leds(wm, WIIMOTE_LED_2);
else if(wm->unid==2)
wiimote_set_leds(wm, WIIMOTE_LED_3);
else if(wm->unid==3)
wiimote_set_leds(wm, WIIMOTE_LED_4);
return 1;
}
default:
{
break;
}
}
}
}
/**
* @brief Send a packet to the wiimote.
*
* @param wm Pointer to a wiimote_t structure.
* @param report_type The report type to send (WIIMOTE_CMD_LED, WIIMOTE_CMD_RUMBLE, etc). Found in wiimote.h
* @param msg The payload.
* @param len Length of the payload in bytes.
*
* This function should replace any write()s directly to the wiimote device.
*/
int wiimote_send(struct wiimote_t* wm, byte report_type, byte* msg, int len)
{
byte buf[32];
buf[0] = WM_SET_REPORT | WM_BT_OUTPUT;
buf[1] = report_type;
memcpy(buf+2, msg, len);
#ifdef WIIMOTE_DBG
int x = 2;
printf("[DEBUG] (id %i) SEND: (%x) %.2x ", wm->unid, buf[0], buf[1]);
for (; x < len+2; ++x)
printf("%.2x ", buf[x]);
printf("\n");
#endif
apple_pad_send_control(wm->connection, buf, len + 2);
return 1;
}
/**
* @brief Read data from the wiimote (event version).
*
* @param wm Pointer to a wiimote_t structure.
* @param addr The address of wiimote memory to read from.
* @param len The length of the block to be read.
*
* The library can only handle one data read request at a time
* because it must keep track of the buffer and other
* events that are specific to that request. So if a request
* has already been made, subsequent requests will be added
* to a pending list and be sent out when the previous
* finishes.
*/
int wiimote_read_data(struct wiimote_t* wm, unsigned int addr, unsigned short len)
{
//No puden ser mas de 16 lo leido o vendra en trozos!
if (!wm || !WIIMOTE_IS_CONNECTED(wm))
return 0;
if (!len /*|| len > 16*/)
return 0;
byte buf[6];
/* the offset is in big endian */
*(int*)(buf) = BIG_ENDIAN_LONG(addr);
/* the length is in big endian */
*(short*)(buf + 4) = BIG_ENDIAN_SHORT(len);
#ifdef WIIMOTE_DBG
printf("Request read at address: 0x%x length: %i", addr, len);
#endif
wiimote_send(wm, WM_CMD_READ_DATA, buf, 6);
return 1;
}
/**
* @brief Write data to the wiimote.
*
* @param wm Pointer to a wiimote_t structure.
* @param addr The address to write to.
* @param data The data to be written to the memory location.
* @param len The length of the block to be written.
*/
int wiimote_write_data(struct wiimote_t* wm, unsigned int addr, byte* data, byte len)
{
byte buf[21] = {0}; /* the payload is always 23 */
if (!wm || !WIIMOTE_IS_CONNECTED(wm))
return 0;
if (!data || !len)
return 0;
#ifdef WIIMOTE_DBG
printf("Writing %i bytes to memory location 0x%x...\n", len, addr);
int i = 0;
printf("Write data is: ");
for (; i < len; ++i)
printf("%x ", data[i]);
printf("\n");
#endif
/* the offset is in big endian */
*(int*)(buf) = BIG_ENDIAN_LONG(addr);
/* length */
*(byte*)(buf + 4) = len;
/* data */
memcpy(buf + 5, data, len);
wiimote_send(wm, WM_CMD_WRITE_DATA, buf, 21);
return 1;
}
/////////////////////// CLASSIC /////////////////
int classic_ctrl_handshake(struct wiimote_t* wm, struct classic_ctrl_t* cc, byte* data, unsigned short len)
{
memset(cc, 0, sizeof(*cc));
wm->exp.type = EXP_CLASSIC;
return 1;
}
static float normalize_and_interpolate(float min, float max, float t)
{
return (min == max) ? 0.0f : (t - min) / (max - min);
}
static void process_axis(struct axis_t* axis, byte raw)
{
if (!axis->has_center)
{
axis->has_center = true;
axis->min = raw - 2;
axis->center = raw;
axis->max = raw + 2;
}
if (raw < axis->min) axis->min = raw;
if (raw > axis->max) axis->max = raw;
axis->raw_value = raw;
if (raw < axis->center)
axis->value = -normalize_and_interpolate(axis->center, axis->min, raw);
else if (raw > axis->center)
axis->value = normalize_and_interpolate(axis->center, axis->max, raw);
else
axis->value = 0;
}
void classic_ctrl_event(struct classic_ctrl_t* cc, byte* msg)
{
cc->btns = ~BIG_ENDIAN_SHORT(*(short*)(msg + 4)) & CLASSIC_CTRL_BUTTON_ALL;
process_axis(&cc->ljs.x, (msg[0] & 0x3F));
process_axis(&cc->ljs.y, (msg[1] & 0x3F));
process_axis(&cc->rjs.x, ((msg[0] & 0xC0) >> 3) | ((msg[1] & 0xC0) >> 5) | ((msg[2] & 0x80) >> 7));
process_axis(&cc->rjs.y, (msg[2] & 0x1F));
}
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