SFUD 25QXX

关于SFUD读W25Q80DV

发布于 2021-07-07 17:37:30 浏览：1370 订阅该版

3 个回答

sync 2021-07-08

这家伙很懒，什么也没写！

chenls 2021-07-08

这家伙很懒，什么也没写！

sync 2021-07-09

这家伙很懒，什么也没写！

@陳大大 
看这个hardware_init函数代码，如果sfud_read_sfdp出错，仍会使用flash_chip_table中定义的参数的，如果实际读写都正常，应该就没问题了，不放心就多测试下
```c
static sfud_err hardware_init(sfud_flash *flash) {
    extern sfud_err sfud_spi_port_init(sfud_flash * flash);

sfud_err result = SFUD_SUCCESS;
    size_t i;

SFUD_ASSERT(flash);

result = sfud_spi_port_init(flash);
    if (result != SFUD_SUCCESS) {
        return result;
    }

#ifdef SFUD_USING_QSPI
    /* set default read instruction */
    flash->read_cmd_format.instruction = SFUD_CMD_READ_DATA;
#endif /* SFUD_USING_QSPI */

/* SPI write read function must be initialize */
    SFUD_ASSERT(flash->spi.wr);
    /* if the user don't configure flash chip information then using SFDP parameter or static flash parameter table */
    if (flash->chip.capacity == 0 || flash->chip.write_mode == 0 || flash->chip.erase_gran == 0
            || flash->chip.erase_gran_cmd == 0) {
        /* read JEDEC ID include manufacturer ID, memory type ID and flash capacity ID */
        result = read_jedec_id(flash);
        if (result != SFUD_SUCCESS) {
            return result;
        }

#ifdef SFUD_USING_SFDP
        extern bool sfud_read_sfdp(sfud_flash *flash);
        /* read SFDP parameters */
        if (sfud_read_sfdp(flash)) {
            flash->chip.name = NULL;
            flash->chip.capacity = flash->sfdp.capacity;
            /* only 1 byte or 256 bytes write mode for SFDP */
            if (flash->sfdp.write_gran == 1) {
                flash->chip.write_mode = SFUD_WM_BYTE;
            } else {
                flash->chip.write_mode = SFUD_WM_PAGE_256B;
            }
            /* find the the smallest erase sector size for eraser. then will use this size for erase granularity */
            flash->chip.erase_gran = flash->sfdp.eraser[0].size;
            flash->chip.erase_gran_cmd = flash->sfdp.eraser[0].cmd;
            for (i = 1; i < SFUD_SFDP_ERASE_TYPE_MAX_NUM; i++) {
                if (flash->sfdp.eraser[i].size != 0 && flash->chip.erase_gran > flash->sfdp.eraser[i].size) {
                    flash->chip.erase_gran = flash->sfdp.eraser[i].size;
                    flash->chip.erase_gran_cmd = flash->sfdp.eraser[i].cmd;
                }
            }
        } else {
#endif

#ifdef SFUD_USING_FLASH_INFO_TABLE
            /* read SFDP parameters failed then using SFUD library provided static parameter */
            for (i = 0; i < sizeof(flash_chip_table) / sizeof(sfud_flash_chip); i++) {
                if ((flash_chip_table[i].mf_id == flash->chip.mf_id)
                        && (flash_chip_table[i].type_id == flash->chip.type_id)
                        && (flash_chip_table[i].capacity_id == flash->chip.capacity_id)) {
                    flash->chip.name = flash_chip_table[i].name;
                    flash->chip.capacity = flash_chip_table[i].capacity;
                    flash->chip.write_mode = flash_chip_table[i].write_mode;
                    flash->chip.erase_gran = flash_chip_table[i].erase_gran;
                    flash->chip.erase_gran_cmd = flash_chip_table[i].erase_gran_cmd;
                    break;
                }
            }
#endif

#ifdef SFUD_USING_SFDP
        }
#endif

}

if (flash->chip.capacity == 0 || flash->chip.write_mode == 0 || flash->chip.erase_gran == 0
            || flash->chip.erase_gran_cmd == 0) {
        SFUD_INFO("Warning: This flash device is not found or not support.");
        return SFUD_ERR_NOT_FOUND;
    } else {
        const char *flash_mf_name = NULL;
        /* find the manufacturer information */
        for (i = 0; i < sizeof(mf_table) / sizeof(sfud_mf); i++) {
            if (mf_table[i].id == flash->chip.mf_id) {
                flash_mf_name = mf_table[i].name;
                break;
            }
        }
        /* print manufacturer and flash chip name */
        if (flash_mf_name && flash->chip.name) {
            SFUD_INFO("Find a %s %s flash chip. Size is %ld bytes.", flash_mf_name, flash->chip.name,
                    flash->chip.capacity);
        } else if (flash_mf_name) {
            SFUD_INFO("Find a %s flash chip. Size is %ld bytes.", flash_mf_name, flash->chip.capacity);
        } else {
            SFUD_INFO("Find a flash chip. Size is %ld bytes.", flash->chip.capacity);
        }
    }

/* reset flash device */
    result = reset(flash);
    if (result != SFUD_SUCCESS) {
        return result;
    }

/* I found when the flash write mode is supported AAI mode. The flash all blocks is protected,
     * so need change the flash status to unprotected before write and erase operate. */
    if (flash->chip.write_mode & SFUD_WM_AAI) {
        result = sfud_write_status(flash, true, 0x00);
        if (result != SFUD_SUCCESS) {
            return result;
        }
    }

/* if the flash is large than 16MB (256Mb) then enter in 4-Byte addressing mode */
    if (flash->chip.capacity > (1L << 24)) {
        result = set_4_byte_address_mode(flash, true);
    } else {
        flash->addr_in_4_byte = false;
    }

return result;
}

```