求救关于 D Flash操作

hlgsoaring · 发表于 2009-11-13 13:46:32

公司用S12HY64M开发仪表盘
我在操作D-Flash的时候无法写数据，请各位大侠给我看一下啊，舍命感激！我的代码如下,
如果我函数传入参数为
addr = 0x4400 (data flah起始地址)
data = 0x3456
但是地址0x4400空间始终为0xFFFF也即全部为1 ，没有写成功

      /**********************************************************
*
*
* VCOCLK - 64MHz, Core Clk - 16MHz, Bus Clk - 8MHz
*
*
**********************************************************/

void flash_init(void)
{
if (0x17 == FCLKDIV)
{
    while (0 == FSTAT_CCIF);
}
else
{
    while (0 == FSTAT_CCIF);
    FCLKDIV_FDIVLCK = 0;
    FCLKDIV_FDIV = 0x07;

}

}

int write_D_flash_word(unsigned int addr, unsigned int data)
{

if(FCLKDIV_FDIVLD ==0)
    FCLKDIV_FDIV = 0x07;

FSTAT_ACCERR = 1;
//Delay_100us();
FSTAT_FPVIOL = 1;

FCCOBIX_CCOBIX = 0x00;
FCCOBHI = 0x11;//Program D-Flash Command
FCCOBLO = 0x00;//0x00;

FCCOBIX_CCOBIX = 0x01;
FCCOB = addr;

FCCOBIX_CCOBIX = 0x02; //word0
FCCOB = data;
/*
FCCOBIX_CCOBIX = 0x03; //word1
FCCOB = data;

FCCOBIX_CCOBIX = 0x04; //word2
FCCOB = data;


FCCOBIX_CCOBIX = 0x05; //word3
FCCOB = data;
*/

FSTAT_CCIF = 1;//launch command
while (FSTAT_CCIF == 0);

if (FSTAT_ACCERR || FSTAT_FPVIOL || FSTAT_MGSTAT)
{
    FSTAT_ACCERR = 1;
    FSTAT_FPVIOL = 1;
    return -1;
}

   return 1;
}
int erase_D_flash_sector(unsigned int addr)
{
if(FCLKDIV_FDIVLD ==0)
    FCLKDIV_FDIV = 0x07;

FSTAT_ACCERR = 1;
//Delay_100us();
FSTAT_FPVIOL = 1;

FCCOBIX_CCOBIX = 0x00;
FCCOBHI = 0x12;
FCCOBLO = 0x00;

FCCOBIX_CCOBIX = 0x01;
FCCOB = addr;

FSTAT_CCIF = 1;

while (0 == FSTAT_CCIF);


if (FSTAT_ACCERR || FSTAT_FPVIOL || FSTAT_MGSTAT)
{
    FSTAT_ACCERR = 1;
    FSTAT_FPVIOL = 1;
    return -1;
}

   return 1;

}

int erase_verify_D_flash_sector(unsigned int addr)
{
if(FCLKDIV_FDIVLD ==0)
    FCLKDIV_FDIV = 0x07;

FSTAT_ACCERR = 1;
//Delay_100us();
FSTAT_FPVIOL = 1;

FCCOBIX_CCOBIX =0x00;
FCCOBHI = 0x10;
FCCOBLO = 0x00;

FCCOBIX_CCOBIX = 0x01;
FCCOB = addr;

FCCOBIX_CCOBIX = 0x02;
FCCOB = 0x04;

FSTAT_CCIF = 1;

while (FSTAT_CCIF == 0);

if (FSTAT_ACCERR || FSTAT_FPVIOL || FSTAT_MGSTAT)
{
    FSTAT_ACCERR = 1;
    FSTAT_FPVIOL = 1;
    return -1;
}

   return 1;

}

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hlgsoaring · 发表于 2009-11-14 11:27:21

我自己给解决掉了，呵呵
我如果对0x4400写数据的话，在程序中需要用*(unsigned int*)0x400来读取，或者*(unsigned int *far)0x10400来读取，而不是用*(unsigned int*)0x4400来读取，那是因为要考虑到PPAGE寄存器的分页机制。
但是我尝试了一下，如果PPAGE = 0x01或者 PPAGE = 0x0C,好像都不对D-FLASH的地址读写都不影响，也即不影响0x400或者0x10400的值，这两个地址中的值都是我写入的Data，不知道为什么PPAGE没有影响这两个值
假如我不设置PPAGE的值，这两个地址中读出的值也是我写入的data，所以还是有点不清楚PPAGE的作用！
请高手指点一下！