Subversion Repositories wf3d

//=======================================================================

// Project Monophony

//   Wire-Frame 3D Graphics Accelerator IP Core

//

// File:

//   mp_hwdep.c

//

// Abstract:

//   Hardware dependent function

//

// Author:

//   Kenji Ishimaru (info.info.wf3d@gmail.com)

//

//======================================================================

//

// Copyright (c) 2015, Kenji Ishimaru

// All rights reserved.

//

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are met:

//

//  -Redistributions of source code must retain the above copyright notice,

//   this list of conditions and the following disclaimer.

//  -Redistributions in binary form must reproduce the above copyright notice,

//   this list of conditions and the following disclaimer in the documentation

//   and/or other materials provided with the distribution.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR

// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;

// OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,

// WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR

// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,

// EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

//

// Revision History

#include "mp_hwdep.h"

volatile int fb_front = 0;

void buffer_clear(unsigned int c,int bank) {

  unsigned int i;

  unsigned int a,ae;

  if (bank==1) a = FRAME_BUFFER_1;

  else a = FRAME_BUFFER_0;

  ae = a+0x4b000;  // 640x480x8

  for (i = a; i < ae; i += 4 ) {

    (*(volatile unsigned int  *)i) = c;

  }

}

void video_init() {

  FB0_OFFSET = FRAME_BUFFER_0;

  FB1_OFFSET = FRAME_BUFFER_1;

  FRONT_BUFFER = 0;

  VIDEO_INT_MASK = 3;

  COLOR_MODE = 2;  // 8bit color

  fb_front = 0;    // BANK0 is displayed

  // clear screen

  printf("COLOR MODE %d\n",COLOR_MODE);

  // Video Start

  VIDEO_START = 0x00000001;

}

void video_swap() {

  int video_status;

  //VIDEO_INT_CLEAR = 0;

  video_status = VIDEO_STATUS;

  while (!(video_status & 0x1))  {

    video_status = VIDEO_STATUS;

  }

  if (fb_front == 0) fb_front = 1;

  else fb_front = 0;

  FRONT_BUFFER = fb_front;

}

void hw_init() {

}