读取nuc120 Data Flash 数据出错

只看该作者 · 2012-11-16 18:49

本人用新唐ICP工具成功向NUC120 Data Flash地址 0x1FFFE下写入5后再到Keil中编写如下程序将此地址下的数据读回来，怎么一直为0啊.哪位高人写过此类代码的还请指点下。
UNLOCKREG();
FMC->ISPCON.ISPEN = 1;
   FMC->ISPCMD.FCTRL = 0;
   FMC->ISPCMD.FCEN = 0;
   FMC->ISPCMD.FOEN = 0;
   FMC->ISPADR = 0x1FFFE;
   c = FMC->ISPDAT;    //读数据
FMC->ISPCON.ISPEN = 0;
   LOCKREG();
   __nop();

只看该作者 · 2012-12-4 19:26

void Flash_Read_(uint32_t u32addr, uint16_t Len, uint32_t *p)
{
while (Len--)
{
FMC->ISPCMD.FCTRL = 0;
FMC->ISPCMD.FCEN = 0;
FMC->ISPCMD.FOEN = 0;
FMC->ISPADR = u32addr;
FMC->ISPDAT = 0;
FMC->ISPTRG.ISPGO = 1;
__ISB();
while (FMC->ISPTRG.ISPGO);

if (FMC->ISPCON.ISPFF == 1)
FMC->ISPCON.ISPFF = 1;

//(每次读4字节)
*p++ = FMC->ISPDAT;

u32addr += 4;
}
}