nandflash擦除写入后不能再次擦除的原因？

ZRAINZ · 发表于 2015-9-1 13:53:19

我用的是K9F4G08U0M
每个block 第一次擦除写入都正常，但是再次擦除后，不能正常擦除，数据不变。请问原因是？大神门请指教

[mw_shl_code=c,true]void Flashearseblocktest(void) { uint8 ret,you[2048]; uint16 i; ret = FlashEraseBlock(FLASH_BLOCK_TABLE_ADDR + FLASH_BLOCK_SIZE*0); //nprintf(ret,0,HEX); if(0x01== (ret & 0x01)) //如果擦除失败 { stprintf("擦除失败"); } //FlashReset(); OSTimeDly(OS_TICKS_PER_SEC/2); IWDG_ReloadCounter(); //nprintf(FLASH_BLOCK_TABLE_ADDR + FLASH_BLOCK_SIZE*m,0,HEX); FlashReadOnePage(FLASH_BLOCK_TABLE_ADDR + FLASH_BLOCK_SIZE*0,&mytest1[0],FLASH_PAGE_SIZE);/////////////////////////////// printf("mytest1[0]= 0x%x, mytest1[1]=0x%x, mytest1[2]=0x%x, mytest1[1536]=0x%x \r\n",mytest1[0],mytest1[1],mytest1[2],mytest1[1536]); for(i=0;i<FLASH_PAGE_SIZE;i++) { if(mytest1!=0xFF) { printf("mytest1[%d] = 0x%x \r\n",i,mytest1); } IWDG_ReloadCounter(); } IWDG_ReloadCounter(); #if 1 for(i=0;i<255;i++) { you=i; } FlashWriteOnePage(FLASH_BLOCK_TABLE_ADDR + FLASH_BLOCK_SIZE*0,&you[0],255); FlashReadOnePage(FLASH_BLOCK_TABLE_ADDR + FLASH_BLOCK_SIZE*0,&mytest1[0],FLASH_PAGE_SIZE); for(i=0;i<255;i++) { if(mytest1!= i) { printf("mytest1[%d] = %d \r\n",i,mytest1); } IWDG_ReloadCounter(); } printf("mytest1[0]= 0x%x, mytest1[1]=0x%x, mytest1[2]=0x%x, mytest1[1536]=0x%x \r\n",mytest1[0],mytest1[1],mytest1[2],mytest1[1536]); #endif }[/mw_shl_code]