drammem.c

一个两碟控制的VCD的代码,两碟之间的转动及连续播放,已大量生产的CODE.

/* Copyright 1996, ESS Technology, Inc.					*/
/* SCCSID @(#)drammem.c	1.4 12/6/97 */

/*
 * $Log$
 */

#include <stdio.h>
#include "util.h"
#include "drammem.h"

#define FIRST_SECTION_SIZE	6912  /* bytes */
#define FIRST_SECTION_X		126   /* X start position */
#define SECOND_SECTION_SIZE	4608  /* bytes */
#define SECOND_SECTION_X	96   /* X start position */
#define SECOND_SECTION_Y	864   /* Y start position */
#define LONG_WORD_SIZE		4     /* bytes */
#define TOTAL_SIZE (FIRST_SECTION_SIZE + SECOND_SECTION_SIZE)

/*-----------------------------------------------------------
  Function:put_scratch
  Description:
    Copy bytes from src_adr to dst_add.
  Parameters:
    dss_add: des. address.
    src_adr: source address.
    size: number of bytes.
  Return:
    number of bytes copied.
-----------------------------------------------------------*/
int put_scratch(int dst_adr, char *src_adr, int size)
{
    sram_to_dram(dst_adr >> 2, (int *)src_adr, size/4);

    return (size);
}

#if 0
/*-----------------------------------------------------------
  Function:get_scratch
  Description:
    Copy bytes from src_adr(in DRAME) to dst_add.
  Parameters:
    dss_add: des. address.
    src_adr: source address in byte address.
    size: number of bytes.
  Return:
    number of bytes copied.
  NOTE:
    The src_add MUST BE the mutiple of 4.
-----------------------------------------------------------*/
int get_scratch(char *dst_adr, int src_adr, int size)
{
    dram_to_sram((int *)dst_adr, src_adr/4, size/4);

    return (size);
}

#endif