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SPI NAND 存储配置

SPI NAND 存储配置步骤如下：
  1. 选择型号，确认开发板的型号被选中支持。

    SDK 默认支持了几种 SPI NAND，编译之前需要确认开发板的型号被选中支持，如果不在支持列表中， 则需要参考 移植指南 进行移植。

    uboot 和 SPL 分区一般都比较小，开启的 SPI NAND 型号过多的话存储容易越界，因此建议只打开需要用到的型号即可。

    • uboot
      使用 make um –> Device Drivers –> MTD Support 选择。
      (0x240000) Offset of bbt in nand
(0x40000) Range of bbt in nand
[*] Define U-boot binaries locations in SPI NAND
(0x100000) Location in SPI NAND to read U-Boot from
[ ] Support Micron SPI NAND
[ ] Support Macronix SPI NAND
[*] Support Winbond SPI NAND
[ ] Support Winbond SPI NAND CONTINUOUS READ MODE
[*] Support GigaDevice SPI NAND
[ ] Support Toshiba SPI NAND
[*] Support FudanMicro SPI NAND
[*] Support Foresee SPI NAND
[*] Support Zbit SPI NAND
[ ] Support Elite SPI NAND
[ ] Support ESMT SPI NAND
[ ] Support UMTEK SPI NAND
SPI Flash Support  --->
UBI support  --->
    • kernel

      kernel 分区比较大，默认打开了 SDK 支持的所有型号，因此不用选择。

  2. 选择文件系统。
    SPI NAND 文件系统采用 UBIFS， 以 demo128_nand 工程为例，默认会生成两个固件，用以支持不同参数配置的 NAND 型号

    • d211_demo128_nand_page_2k_block_128k_v1.0.0： page size 为 2K，大部分 SPINAND 为此类型

    • d211_demo128_nand_page_4k_block_256k_v1.0.0： page size 为 4K

    注：

    调整分区大小时，需要同时调整固件的大小来和分区匹配。

  3. 分区
    分区信息在 target/d211/demo128_nand/image_cfg.json 中
    "spi-nand": { // Device, The name should be the same with string in image:info:media:type
        "size": "128m", // Size of SPI NAND
        "partitions": {
            "spl":      { "size": "1m" },
            "uboot":    { "size": "1m" },
            "userid":   { "size": "256k" },
            "bbt":      { "size": "256k" },
            "env":      { "size": "256k" },
            "env_r":    { "size": "256k" },
            "falcon":   { "size": "256k" },
            "logo":     { "size": "768K" },
            "kernel":   { "size": "12m" },
            "recovery": { "size": "10m" },
            "ubiroot":  {
                "size": "32m",                          //分区大小为 32m
                "ubi": { // Volume in UBI device
                    "rootfs": { "size": "-" },
                },
            },
            "ubisystem": {
                "size": "-",
                "ubi": { // Volume in UBI device
                    "ota":   { "size": "48m" },
                    "user":   { "size": "-" },
                },
            },
        }
    },
  4. 调整固件大小。
    固件的大小调整通过 make menuconfig –> Filesystem images –> RootFS images 调整
    [ ] ext2/3/4 root filesystem
[ ] cpio the root filesystem (for use as an initial RAM filesystem)
[ ] initial RAM filesystem linked into linux kernel
[ ] jffs2 root filesystem
[ ] squashfs root filesystem
[ ] tar the root filesystem
    ubi parameter select (spi-nand all type support)  --->
[*] ubi image containing an ubifs root filesystem
[ ]   Use custom config file
()    Additional ubinize options
-*- ubifs root filesystem
(0x2000000) ubifs size(Should be aligned to MB)                      //固件大小，32M
ubifs runtime compression (lzo)  --->
Compression method (no compression)  --->
(-F)  Additional mkfs.ubifs options