• uboot命令


    ? - alias for 'help'
    askenv - get environment variables from stdin
    base - print or set address offset
    bdinfo - print Board Info structure
    bmp - manipulate BMP image data
    boot - boot default, i.e., run 'bootcmd'
    bootd - boot default, i.e., run 'bootcmd'
    bootelf - Boot from an ELF image in memory
    bootm - boot application image from memory
    bootp - boot image via network using BOOTP/TFTP protocol
    bootvx - Boot vxWorks from an ELF image
    cmp - memory compare
    coninfo - print console devices and information
    cp - memory copy
    crc32 - checksum calculation
    date - get/set/reset date & time
    dcache - enable or disable data cache
    dhcp - boot image via network using DHCP/TFTP protocol
    echo - echo args to console
    editenv - edit environment variable
    eeprom - EEPROM sub-system
    erase - erase FLASH memory
    exit - exit script
    fatinfo - print information about filesystem
    fatload - load binary file from a dos filesystem
    fatls - list files in a directory (default /)
    flinfo - print FLASH memory information
    fsinfo - print information about filesystems
    fsload - load binary file from a filesystem image
    go - start application at address 'addr'
    help - print online help
    i2c - I2C sub-system
    icache - enable or disable instruction cache
    iminfo - print header information for application image
    imls - list all images found in flash
    imxtract- extract a part of a multi-image
    itest - return true/false on integer compare
    loadb - load binary file over serial line (kermit mode)
    loads - load S-Record file over serial line
    loadx - load binary file over serial line (xmodem mode)
    loady - load binary file over serial line (ymodem mode)
    loop - infinite loop on address range
    ls - list files in a directory (default /)
    md - memory display
    mm - memory modify (auto-incrementing address)
    mmc - MMC sub-system
    mtest - simple RAM read/write test
    mw - memory write (fill)
    nand - NAND sub-system
    nboot - boot from NAND device
    nfs - boot image via network using NFS protocol
    nm - memory modify (constant address)
    ping - send ICMP ECHO_REQUEST to network host
    printenv- print environment variables
    protect - enable or disable FLASH write protection
    rarpboot- boot image via network using RARP/TFTP protocol
    reginfo - print register information
    reset - Perform RESET of the CPU
    run - run commands in an environment variable
    saveenv - save environment variables to persistent storage
    setenv - set environment variables
    showvar - print local hushshell variables
    sleep - delay execution for some time
    source - run script from memory
    test - minimal test like /bin/sh
    tftpboot- boot image via network using TFTP protocol
    unzip - unzip a memory region
    usb - USB sub-system
    usbboot - boot from USB device
    version - print monitor version

    bootm

    引导启动存储在内存中的程序映像

    # bootm [addr [arg ...]]
    Sub-commands to do part of the bootm sequence. The sub-commands must beissued in 
        the order below (it's ok to not issue all sub-commands): 
                start [addr [arg ...]] 
                loados - load OS image 
                cmdline - OS specific command line processing/setup 
                bdt - OS specific bd_t processing 
                prep - OS specific prep before relocation or go 
                go - start OS

    第一个参数:映像地址
    第一个参数:通常是Ramdisk映像存储地址;也可以是传递给Linux内核的参数(缺省情况下传递bootargs环境变量)

    例:

    # bootm kernel_addr ramdisk_addr device_tree_addr

    如果不想加载ramdisk,用’-‘代替即可

    bootp

    通过TFTP协议下载文件到内存

    # bootp [loadAddress] [bootfilename]

    loadAddress:文件存放的内存地址
    bootfilename:文件名称

    cmp

    内存比较

    # cmp [.b, .w, .l] addr1 addr2 count

    b:1Byte
    w:2Byte
    l:4Byte

    例:cmp.b,下同

    cp

    内存复制

    # cp [.b, .w, .l] source target count

    source:原地址
    target:目的地址

    注:这个地址如果在Flash中,那么会直接调用写Flash的函数操作。uboot写Flash就使用这个命令,当然要先擦除对应Flash

    crc32

    计算存储数据的校验和

    # crc32 address count [addr]

    address:起始地址
    addr:结果地址

    echo

    回显参数

    # echo [args..]

    erase

    擦除Flash

    # erase start end
    # erase N:SF[-SL]
    # erase bank N
    # erase all

    start:块起始地址
    end:块结束地址
    N:Flash组号
    SF:起始扇区号
    SL:结束扇区号
    all:全部Flash

    flinfo

    # flinfo
    # flinfo N

    flinfo:Flash组信息
    N:某个组

    go

    # go addr [arg ...]

    addr:程序入口地址
    arg:参数

    iminfo

    映像的开头信息(序列号、头和校验和)

    # iminfo addr [addr ...]

    addr:起始地址
    …:多地址

    loadb

    通过串口Kermit协议下载二进制数据

    # loadb [ off ] [ baud ]

    loads

    通过串口线下载S-Record格式文件

    # loads [ off ]

    mw

    写内存

    # mw [.b, .w, .l] address value [count]

    address:内存地址
    value:写的值
    count:单位值的数目

    nm

    修改内存

    # nm [.b, .w, .l] address

    address:读出并且修改的内存地址

    md

    显示内存的内容

    例:

    # md.w 0x8200000 0x8

    mm

    修改内存

    nfs

    通过NFS协议启动网络映像

    # nfs [loadAddress] [host ip addr:bootfilename]

    loadAddress:内存地址

    printenv

    打印环境变量

    # printenv 
    # printenv name ...

    name:变量名

    protect

    Flash写保护

    # protect on/off start end
    # protect on/off N:SF[-SL]
    # protect on/off bank N
    # protect on/off all

    on:写保护
    off:解除保护

    rarpboot

    通过TFTP启动网络映像

    # rarpboot [loadAddress] [bootfilename]

    run

    执行环境变量中的命令

    # run var [...]

    setenv

    设置环境变量

    # setenv name value ...
    # setenv name

    注:设置包含特殊字符时需要用”

    # setenv bootcmd 'nand read...'

    saveenv

    保存环境变量。将变量写入flash

    注:变量空间只有8k

    sleep

    延迟N秒钟执行,N为十进制数

    # sleep N

    tftpboot

    # tftpboot [loadAddress] [bootfilename]

    通过TFTP协议下载文件

    ping

    uboot ping 别的主机

    usb

    # usb start
    # usb info
    # usb scan

    start:启动usb
    info:列出设备
    scan:扫描usb设备

    kgo

    启动没有压缩的linux内核

    fatls

    列出DOS FAT文件系统

    fatload

    读入FAT中的一个文件

    与环境变量相关
    bootdelay:执行自动启动的等候秒数
    baudrate:串口波特率
    netmask:以太网的网络掩码
    ethaddr:以太网的MAC地址
    bootargs:传递给Linux内核的启动参数
    bootcmd:自动启动时执行命令
    serverip:TFTP服务器端的IP地址
    ipaddr:本地的IP地址

    Nand Flash相关

    # nand info

    显示可使用的Nand Flash

    # nand read addr off size

    从Nand的 off 偏移地址处读取size字节的数据到SDRAM的addr地址

    # nand write addr off size

    将SDRAM的addr地址处size字节的数据烧写到Nand的 off 偏移地址

    # nand write[.yaffs[1]] addr off size 

    例:

    # nand write.yaffs 0x8000000 0x100000 0

    0:自动判断文件大小去烧写

    # nand erase [clean] [off size]

    擦除Nand Flash的 off 偏移地址处的size字节的数据

    # nand bad

    显示Nand Flash的坏块

    # nand dump[.oob] off

    显示Nand Flash中的数据(16进制)

    # nand scrub

    彻底擦除整块Nand Flash中的数据,包括OOB。可以擦除软件坏块标志

    # nand markbad off

    标识Nand的 off 偏移地址处的块为坏块

    Nor Flash
    Nor Flash的烧写时序和SDRAM的写入不同,烧写Nor Flash不能使用mm等命令,只能使用cp命令从内存拷贝到Nor Flash,而且烧写之前必须解除保护并擦除
    Nor Flash擦除的最小单位是Sector,也就是0x10000字节。如果你定义的大小不满1 Sector或超过Sector的边界,那么被定义到的Sector会被全部擦除

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  • 原文地址:https://www.cnblogs.com/zhangxuechao/p/11709787.html
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