/*---------------------------------------------------------------------------*
  Project:  TwlSDK - GX - demos - UnitTours/Sub_Oam_1
  File:     main.c

  Copyright 2003-2009 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.

  $Date:: 2009-06-04#$
  $Rev: 10698 $
  $Author: okubata_ryoma $
 *---------------------------------------------------------------------------*/

//---------------------------------------------------------------------------
// A sample that displays an sphere using character OBJ:
//
// HOWTO:
// 1. Transfer object character data by GXS_LoadOBJ().
// 2. Transfer object palette data by GXS_LoadOBJPltt().
// 3. Specify the attributes for objects by G2S_SetOBJAttr() and etc.
// 4. Transfer the copy of object attribute memory by GXS_LoadOAM().
//
// Do not forget to flush the corresponding cache if you modified the data
// before transfer.
//---------------------------------------------------------------------------

#ifdef SDK_TWL
#include <twl.h>
#else
#include <nitro.h>
#endif
#include "DEMO.h"
#include "data.h"

static GXOamAttr sOamBak[128];         // Buffer for OAM

#ifdef SDK_TWL
void TwlMain(void)
#else
void NitroMain(void)
#endif
{
    //---------------------------------------------------------------------------
    // Initialize:
    // They enable IRQ interrupts, initialize VRAM, and make OBJ visible.
    //---------------------------------------------------------------------------
    DEMOInitCommon();
    DEMOInitVRAM();
    DEMOInitDisplaySubOBJOnly();

    //---------------------------------------------------------------------------
    // Transmitting the character data and the palette data
    //---------------------------------------------------------------------------
    GXS_LoadOBJ(d_64_256_obj_schDT, 0, sizeof(d_64_256_obj_schDT));
    GXS_LoadOBJPltt(d_64_256_obj_sclDT, 0, sizeof(d_64_256_obj_sclDT));

    DEMOStartDisplay();
    //---------------------------------------------------------------------------
    // Main Loop
    //---------------------------------------------------------------------------
    while (1)
    {
        G2_SetOBJAttr(&sOamBak[0],     // a pointer to the attributes
                      0,               // x
                      0,               // y
                      0,               // priority
                      GX_OAM_MODE_NORMAL,       // OBJ mode
                      FALSE,           // mosaic 
                      GX_OAM_EFFECT_NONE,       // flip/affine/no display/affine(double)
                      GX_OAM_SHAPE_64x64,       // size and shape
                      GX_OAM_COLORMODE_256,     // OBJ character data are in 256 colors format
                      0,               // character name
                      0,               // color param
                      0                // affine param
            );

        // Store the data onto the main memory, and invalidate the cache.
        DC_FlushRange(sOamBak, sizeof(sOamBak));
        /* DMA操作でIOレジスタへアクセスするのでキャッシュの Wait は不要 */
        // DC_WaitWriteBufferEmpty();

        OS_WaitVBlankIntr();           // waiting the end of VBlank interrupt

        GXS_LoadOAM(sOamBak, 0, sizeof(sOamBak));

        MI_DmaFill32(3, sOamBak, 192, sizeof(sOamBak)); // OAMバッファをクリアー
    }

}

//---------------------------------------------------------------------------
// VBlank interrupt function:
//
// Interrupt handlers are registered on the interrupt table by OS_SetIRQFunction.
// OS_EnableIrqMask selects IRQ interrupts to enable, and
// OS_EnableIrq enables IRQ interrupts.
// Notice that you have to call 'OS_SetIrqCheckFlag' to check a VBlank interrupt.
//---------------------------------------------------------------------------
void VBlankIntr(void)
{
    OS_SetIrqCheckFlag(OS_IE_V_BLANK); // checking VBlank interrupt
}
