STM32H743 NAND HAL_NAND_Read_Status()一直返回0XFF的原因？

这是我的测试代码：
void NAND_Erase_Chip(void){    HAL_StatusTypeDef err_code = HAL_OK;    NAND_AddressTypeDef addr = {0};    for(uint16_t i = 0; i < nand_dev.block_totalnum; i++)    {        addr.Block = i;        printf("Erase block %drn", i);        err_code = HAL_NAND_Erase_Block( hnand1,  addr);        if(err_code)        {            printf("Erase %d block fail!! Error code is %drn", i, err_code);        }    }}uint8_t Test_Read_Page(uint16_t block_num, uint16_t page_num){    static uint8_t first_time_exe = 0;    uint8_t *pbuf;    uint8_t sta = 0;    uint16_t i = 0;    NAND_AddressTypeDef addr = {0};    addr.Block = block_num;    addr.Page = page_num;    printf("rn ========Read block %d page %d ========rn", block_num, page_num);    if(first_time_exe == 0)    {//        printf("Start to erase chip...rn");//        NAND_Erase_Chip();//        printf("Erase chip finished...rn");        printf("Start to erase block %d...rn", block_num);        sta = HAL_NAND_Erase_Block( hnand1,  addr);        if(sta)        {            printf("Erase block failed...rn");        }        else        {            printf("Erase block finished...rn");        }        first_time_exe = 1;        NAND_Delay(100);    }    pbuf = My_Malloc(SRAM1, hnand1.Config.PageSize);    sta = HAL_NAND_Read_Page_8b( hnand1,  addr, pbuf, 1);    if(sta == HAL_OK)    {        printf("read block %d page %d data is: rn", addr.Block, addr.Page);        for(i = 0; i < hnand1.Config.PageSize; i++)        {            printf("%x ", pbuf);        }        printf("rn");    }    My_Free(SRAM1, pbuf);    return sta;}uint8_t Test_Write_Page(uint16_t block_num, uint16_t page_num){    uint8_t *pbuf;    uint8_t sta = 0;    uint16_t i = 0;    NAND_AddressTypeDef addr = {0};    pbuf = My_Malloc(SRAM1, hnand1.Config.PageSize);    addr.Block = block_num;    addr.Page = page_num;    for(i = 0; i < hnand1.Config.PageSize; i++)    {        pbuf = i;    }    printf("Start to write page...rn");    sta = HAL_NAND_Write_Page_8b( hnand1,  addr, pbuf, 1);    printf("Write page finished. Error code is %drn", sta);    My_Free(SRAM1, pbuf);    return sta;}void Test_Nand(void){    NAND_IDTypeDef pNAND_ID;    HAL_NAND_Reset( hnand1);    HAL_NAND_Read_ID( hnand1,  pNAND_ID);    printf("NAND ID is: 0x%x-%x-%x-%xrn", pNAND_ID.Maker_Id, pNAND_ID.Device_Id, pNAND_ID.Third_Id, pNAND_ID.Fourth_Id);    Test_Read_Page(10, 10);    Test_Write_Page(10, 10);    printf("Read data again...rn");    Test_Read_Page(9, 9);    Test_Read_Page(10, 10);    Test_Read_Page(11, 11);}