vm_w_exp.c

Actions VRAM 驱动源码

/*
********************************************************************************
*                       ACTOS
*                  ((            ))
*
*                (c) Copyright 2002-2003, Actions Co,Ld.
*                        All Right Reserved
*
* File   : vm_w_exp.msa
* By     : Gongee
* Version: 1> v1.00     first version     date
********************************************************************************
* $Id: vm_w_exp.c,v 1.1.1.1 2006/01/11 08:07:22 rowena Exp $
********************************************************************************
*/
#include "vm_nanf.h"
#pragma memory=dataseg(BAD_W_EXP)
UD_RW udrwexp;
char tempexp0,tempexp1;
#pragma memory=default

#pragma codeseg(BAC_W_EXP)

bool VMExpWrite(void *pbuf, unsigned long address, unsigned int len, char page)    //该函数默认已安装慢速驱动，address单位为Bytes，len单位为扇区
{
    int count;
    unsigned int oldstgdrv;
    unsigned long temp;

    if(address >= VM_CAP)    //判断是否越界
    {
        return FALSE;
    }

//为了使Vram驱动不调用C库而作修改  05-6-12 15:24
//    udrwexp.lba = address >> 9;
    temp = address >> 1;
    udrwexp.lba = temp >> 8;
//为了使Vram驱动不调用C库而作修改  05-6-12 15:24

    udrwexp.sramaddr = pbuf;

//    if((unsigned int)pbuf < 0x4000)
//    {
//        udrwexp.srampage = 8;
//    }
//    else
//    {
//        udrwexp.srampage = input8(0x05) & 0x0f;
//    }

    udrwexp.srampage = page & 0x0f;

    for ( count = 0; count < len; count++ )
    {
        UD_SectorWrite(&udrwexp);
        udrwexp.lba ++;
        ( (BYTE *)udrwexp.sramaddr ) += 0x200;
    }
//    UD_Update();   //05-8-31 11:02 提高速度

    return 1;
}