/*---------------------------------------------------------------------------*
  Project:  TwlSDK - SPI - demos
  File:     main.c

  Copyright 2003-2008 Nintendo. All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law. They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Date:: 2008-09-18#$
  $Rev: 8573 $
  $Author: okubata_ryoma $
 *---------------------------------------------------------------------------*/

#include    <nitro.h>
#include    "monkey.h"
#include    "snd_data.h"


/*---------------------------------------------------------------------------*
    Constant Definitions
 *---------------------------------------------------------------------------*/
#define     KEY_REPEAT_START    25     // Number of frames until key repeat starts
#define     KEY_REPEAT_SPAN     10     // Number of frames between key repeats


/*---------------------------------------------------------------------------*
    Structure Definitions
 *---------------------------------------------------------------------------*/
// Key input data
typedef struct KeyInformation
{
    u16     cnt;                       // Unprocessed input value
    u16     trg;                       // Push trigger input
    u16     up;                        // Release trigger input
    u16     rep;                       // Press and hold repeat input

}
KeyInformation;

/*---------------------------------------------------------------------------*
    Internal Function Definitions
 *---------------------------------------------------------------------------*/
static void Init3D(void);
static void Draw3D(void);
static void DrawLine(s16 sx, s16 sy, s16 ex, s16 ey, GXRgb color);
static void VBlankIntr(void);
static void KeyRead(KeyInformation * pKey);


/*---------------------------------------------------------------------------*
    Internal Variable Definitions
 *---------------------------------------------------------------------------*/
static KeyInformation gKey;
static MICAutoParam gMicAutoParam;
static u16 gMicData[192];
static TPData gTpData[4];


/*---------------------------------------------------------------------------*
  Name:         NitroMain

  Description:  Initialization and main loop.

  Arguments:    None.

  Returns:      None.
 *---------------------------------------------------------------------------*/
void NitroMain(void)
{
    // Various types of initialization
    OS_Init();
    OS_InitThread();
    OS_InitTick();
    OS_InitAlarm();
    FX_Init();
    GX_Init();
    GX_DispOff();
    GXS_DispOff();
    GX_SetDispSelect(GX_DISP_SELECT_SUB_MAIN);

    // Initializes display settings
    GX_SetBankForLCDC(GX_VRAM_LCDC_ALL);
    MI_CpuClearFast((void *)HW_LCDC_VRAM, HW_LCDC_VRAM_SIZE);
    (void)GX_DisableBankForLCDC();
    MI_CpuFillFast((void *)HW_OAM, 192, HW_OAM_SIZE);
    MI_CpuClearFast((void *)HW_PLTT, HW_PLTT_SIZE);
    MI_CpuFillFast((void *)HW_DB_OAM, 192, HW_DB_OAM_SIZE);
    MI_CpuClearFast((void *)HW_DB_PLTT, HW_DB_PLTT_SIZE);

    // 3D-related initialization
    Init3D();

    // Interrupt settings
    OS_SetIrqFunction(OS_IE_V_BLANK, VBlankIntr);
    (void)OS_EnableIrqMask(OS_IE_V_BLANK);
    (void)OS_EnableIrq();
    (void)OS_EnableInterrupts();
    (void)GX_VBlankIntr(TRUE);

    // Start thread for device sampling
    MonkeyInit();

    // Initialize sound
    {
        SND_Init();
        SND_AssignWaveArc((SNDBankData *)sound_bank_data, 0, (SNDWaveArc *)sound_wave_data);
        SND_StartSeq(0, sound_seq_data, 0, (SNDBankData *)sound_bank_data);
    }

    // LCD display start
    GX_DispOn();
    GXS_DispOn();

    // Debug string output
    OS_Printf("ARM9: SPI parallel sampling demo \"spiMonkey\" started.\n");

    // Empty call for getting key input data (strategy for pressing A button in the IPL)
    KeyRead(&gKey);

    // Main loop
    while (TRUE)
    {
        // Get key input data
        KeyRead(&gKey);

        // Get mic and touch panel input information
        MonkeyGetNewMicData(192, gMicData);
        MonkeyGetNewTpData(4, gTpData);

        // Render
        Draw3D();

        // Sound
        while (SND_RecvCommandReply(SND_COMMAND_NOBLOCK) != NULL)
        {
        }
        (void)SND_FlushCommand(SND_COMMAND_NOBLOCK);

        // Waiting for the V-Blank
        OS_WaitVBlankIntr();
    }
}

/*---------------------------------------------------------------------------*
  Name:         Init3D

  Description:  Initialization for 3D display.

  Arguments:    None.

  Returns:      None.
 *---------------------------------------------------------------------------*/
static void Init3D(void)
{
    G3X_Init();
    G3X_InitMtxStack();
    G3_SwapBuffers(GX_SORTMODE_AUTO, GX_BUFFERMODE_W);
    GX_SetGraphicsMode(GX_DISPMODE_GRAPHICS, GX_BGMODE_0, GX_BG0_AS_3D);
    GX_SetVisiblePlane(GX_PLANEMASK_BG0);
    G2_SetBG0Priority(0);
    G3X_SetShading(GX_SHADING_TOON);
    G3X_AlphaTest(FALSE, 0);
    G3X_AlphaBlend(TRUE);
    G3X_AntiAlias(TRUE);
    G3X_EdgeMarking(FALSE);
    G3X_SetFog(FALSE, (GXFogBlend)0, (GXFogSlope)0, 0);
    G3X_SetClearColor(0, 0, 0x7fff, 63, FALSE);
    G3_ViewPort(0, 0, 255, 191);
}

/*---------------------------------------------------------------------------*
  Name:         Draw3D

  Description:  Displays waveforms in 3D.

  Arguments:    None.

  Returns:      None.
 *---------------------------------------------------------------------------*/
static void Draw3D(void)
{
    G3X_Reset();

    G3_MtxMode(GX_MTXMODE_PROJECTION);
    G3_Identity();
    G3_MtxMode(GX_MTXMODE_POSITION_VECTOR);
    G3_Identity();

    G3_PolygonAttr(GX_LIGHTMASK_NONE, GX_POLYGONMODE_MODULATE, GX_CULL_NONE, 0, 31, 0);

    {
        s32     i;

        // Waveform display of mic data
        for (i = 0; i < 191; i++)
        {
            DrawLine((s16)(gMicData[i] >> 8),
                     (s16)(i), (s16)(gMicData[i + 1] >> 8), (s16)(i + 1), GX_RGB(31, 31, 0));
        }

        // Display Touch Panel contact as '+' mark
        for (i = 0; i < 4; i++)
        {
            if (gTpData[i].touch == TP_TOUCH_ON)
            {
                if (!(gTpData[i].validity & TP_VALIDITY_INVALID_X))
                {
                    // Display the x coordinate with a line
                    DrawLine((s16)(gTpData[i].x),
                             (s16)(0),
                             (s16)(gTpData[i].x),
                             (s16)(191), GX_RGB(31 - (i * 6), 31 - (i * 6), 31 - (i * 6)));
                }
                if (!(gTpData[i].validity & TP_VALIDITY_INVALID_Y))
                {
                    // Display the y coordinate with a line
                    DrawLine((s16)(0),
                             (s16)(gTpData[i].y),
                             (s16)(255),
                             (s16)(gTpData[i].y), GX_RGB(31 - (i * 6), 31 - (i * 6), 31 - (i * 6)));
                }
            }
        }
    }

    G3_SwapBuffers(GX_SORTMODE_AUTO, GX_BUFFERMODE_W);
}

/*---------------------------------------------------------------------------*
  Name:         DrawLine

  Description:  Renders lines with triangular polygons.

  Arguments:    sx: X-coordinate of line's starting point
                sy: Y-coordinate of line's starting point
                ex: X-coordinate of line's ending point
                ey: Y-coordinate of line's ending point
                color: Color of line drawn

  Returns:      None.
 *---------------------------------------------------------------------------*/
static void DrawLine(s16 sx, s16 sy, s16 ex, s16 ey, GXRgb color)
{
    fx16    fsx;
    fx16    fsy;
    fx16    fex;
    fx16    fey;

    fsx = (fx16)(((sx - 128) * 0x1000) / 128);
    fsy = (fx16)(((96 - sy) * 0x1000) / 96);
    fex = (fx16)(((ex - 128) * 0x1000) / 128);
    fey = (fx16)(((96 - ey) * 0x1000) / 96);

    G3_Begin(GX_BEGIN_TRIANGLES);
    {
        G3_Color(color);
        G3_Vtx(fsx, fsy, 0);
        G3_Color(color);
        G3_Vtx(fex, fey, 0);
        G3_Color(color);
        G3_Vtx(fsx, fsy, 1);
    }
    G3_End();
}

/*---------------------------------------------------------------------------*
  Name:         VBlankIntr

  Description:  V-Blank interrupt vector.

  Arguments:    None.

  Returns:      None.
 *---------------------------------------------------------------------------*/
static void VBlankIntr(void)
{
    // Sets the IRQ check flag
    OS_SetIrqCheckFlag(OS_IE_V_BLANK);
}

/*---------------------------------------------------------------------------*
  Name:         KeyRead

  Description:  Edits key input data.
                Detects press trigger, release trigger, and press-and-hold repeat.

  Arguments:    pKey: Structure that holds key input data to be edited

  Returns:      None.
 *---------------------------------------------------------------------------*/
static void KeyRead(KeyInformation * pKey)
{
    static u16 repeat_count[12];
    int     i;
    u16     r;

    r = PAD_Read();
    pKey->trg = 0x0000;
    pKey->up = 0x0000;
    pKey->rep = 0x0000;

    for (i = 0; i < 12; i++)
    {
        if (r & (0x0001 << i))
        {
            if (!(pKey->cnt & (0x0001 << i)))
            {
                pKey->trg |= (0x0001 << i);     // Press trigger
                repeat_count[i] = 1;
            }
            else
            {
                if (repeat_count[i] > KEY_REPEAT_START)
                {
                    pKey->rep |= (0x0001 << i); // Press-and-hold repeat
                    repeat_count[i] = KEY_REPEAT_START - KEY_REPEAT_SPAN;
                }
                else
                {
                    repeat_count[i]++;
                }
            }
        }
        else
        {
            if (pKey->cnt & (0x0001 << i))
            {
                pKey->up |= (0x0001 << i);      // Release trigger
            }
        }
    }
    pKey->cnt = r;                     // Unprocessed key input
}

/*---------------------------------------------------------------------------*
  End of file
 *---------------------------------------------------------------------------*/
