gistfile1.txt

static int  set_data_flash_base(uint32_t u32DFBA)
{
    uint32_t   au32Config[2];

    if (FMC_ReadConfig(au32Config, 2) < 0) {
        printf("\nRead User Config failed!\n");
        return -1;
    }

    if ((!(au32Config[0] & 0x1)) && (au32Config[1] == u32DFBA))
        return 0;

    FMC_ENABLE_CFG_UPDATE();

    au32Config[0] &= ~0x1;
	au32Config[0] |= 0x1<<26; //Enable the HIRC 
    au32Config[1] = u32DFBA;

    if (FMC_WriteConfig(au32Config, 2) < 0)
        return -1;

    printf("\nSet Data Flash base as 0x%x.\n", DATA_FLASH_TEST_BASE);

    // Perform chip reset to make new User Config take effect
    SYS->IPRST_CTL1 = SYS_IPRST_CTL1_CHIP_RST_Msk;
    return 0;
}