control.c

/* ---------------------------------------------------------------------------
 * - (C) Sony Computer Entertainment. All Rights Reserved.
 * -
 * - Project:   Movie Player V2.0
 * -
 * - Name:      control.c
 * -
 * - Author:    Vince Diesi
 * -
 * - Date:      13th Feb 1996
 * -
 * - Description:
 * - ------------
 * - Controller functions. Only supports the standard controller.
 * ---------------------------------------------------------------------------
 */
#include <sys/types.h>
#include <kernel.h>
#include <libpad.h>

#include "ctrller.h"
#include "control.h"

/* ---------------------------------------------------------------------------
 * - CONSTANTS
 * ---------------------------------------------------------------------------
 */

// Define for timing and testing functions.
// #define TESTING


// Controllers connected.
#define NO_PADS         0
#define PAD_ONE         1
#define PAD_TWO         2
#define BOTH_PADS       3

#define DS_PAD_1        0       //port id for pad 1
#define DS_PAD_2        1       //port id for pad 2

/* ---------------------------------------------------------------------------
 * - GLOBAL DEFINITIONS
 * ---------------------------------------------------------------------------
 */

static volatile short connected = 0;            // No. controllers connected.
static volatile short currController = 0;       // Current active controller.

static volatile ControllerPacket buffers[2];

#define vibBuffLength   8
u_char transmissionBuffer[2][vibBuffLength];    //vibration buffers for pads

/* ---------------------------------------------------------------------------
 * - FUNCTION DEFINITIONS
 * ---------------------------------------------------------------------------
 */
void InitControllers(void)
{
/* - Type:  PUBLIC
 * -
 * - Usage: Init controllers.
 */
    InitPAD((char *) &buffers[0], MAX_CONTROLLER_BYTES, (char *) &buffers[1], MAX_CONTROLLER_BYTES);
    StartPAD();
    ChangeClearPAD(0);

    VSync(0);
    CheckControllers();
}

/* ------------------------------------------------------------------------ */
void StopControllers(void)
{
/* - Type:  PUBLIC
 * -
 * - Usage: Stop controllers.
 */
    StopPAD();
    connected = 0;
    currController = 0;
}

/* ------------------------------------------------------------------------ */
void CheckControllers(void)
{
/* - Type:  PUBLIC
 * -
 * - Usage: Check number of controllers connected (stored in connected).
 * -        Also selects the active controller (stored in currController).
 * -        Should be called in the VSyncCallback() to constantly check the
 * -        controller status.
 */
    connected=0;

    if(GoodData(&buffers[0]) && (GetType(&buffers[0])==STD_PAD || GetType(&buffers[0])==ANALOG_PAD)) connected|=PAD_ONE;
    if(GoodData(&buffers[1]) && (GetType(&buffers[1])==STD_PAD || GetType(&buffers[1])==ANALOG_PAD)) connected|=PAD_TWO;
    if(connected==BOTH_PADS || connected==PAD_ONE) currController=0;
    else if (connected==PAD_TWO) currController=1;
}

/* ------------------------------------------------------------------------ */
__inline short Pressed(short button)
{
/* - Type:  PUBLIC
 * -
 * - Param: button = (In) Button to test.
 * -
 * - Ret:   1 if pressed, 0 otherwise.
 * -
 * - Usage: Test if button has been pressed.
 */
    return (connected && !(buffers[currController].data.pad & button));
}

__inline unsigned short GetPadValue()
{
/* - Type:  PUBLIC
 * -
 * - Param: button = (In) Button to test.
 * -
 * - Ret:   1 if pressed, 0 otherwise.
 * -
 * - Usage: Test if button has been pressed.
 */
    if(connected) return ~buffers[currController].data.pad;
    return 0;
}

/* ------------------------------------------------------------------------ */
void GetStablePad(int port)
{
    //this is just a simple loop that keeps going till both pads are in a stable state
    while (PadGetState(port)!=PadStateStable);  //loop till both pads are in a stable state
}