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求ONU固件导出方法?

求ONU固件导出方法?

一款ONU,想把现在的固件导出来,有做过的朋友没在U-BOOT下好像看到导出的命令
CONSOLE输出信息:



U-Boot 1.1.6 (Mar  4 2011 - 14:26:00) Mindspeed 0.06.7  ALPHA v1.

DRAM:  128 MB
Flash: 32 MB
NAND:  No NAND device found!!!
0 MiB
In:    serial
Out:   serial
Err:   serial
Reserve MSP memory
Net:   GEMAC_NET_CONFIG_RECEIVE_1536
GEMAC_NET_CONFIG_COPY_ALL
GEMAC_NET_CONFIG_RECEIVE_1536
GEMAC_NET_CONFIG_RECEIVE_1536
gemac0, gemac1
Hit any key to stop autoboot:  0
Comcerto-300 > ?
?       - alias for 'help'
base    - print or set address offset
bootcomcerto - load CSP image (binary or ELF format) and start Comcerto device
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
chpart  - change active partition
cmp     - memory compare
cp      - memory copy
crc32   - checksum calculation
eeprom  - EEPROM sub-system
erase   - erase FLASH memory
flinfo  - print FLASH memory information
fsinfo  - print information about filesystems
fsload  - load binary file from a filesystem image
gemac   - set ethernet interface parameters
go      - start application at address 'addr'
help    - print online help
icrc32  - checksum calculation
iloop   - infinite loop on address range
imd     - i2c memory display
imm     - i2c memory modify (auto-incrementing)
imw     - memory write (fill)
inm     - memory modify (constant address)
iprobe  - probe to discover valid I2C chip addresses
loadmsp - load MSP image (AXF or ELF format) and save MSP start address
loop    - infinite loop on address range
ls      - list files in a directory (default /)
md      - memory display
mii     - MII utility commands
mm      - memory modify (auto-incrementing)
mtdparts- define flash/nand partitions
mtest   - simple RAM test
mw      - memory write (fill)
nand    - NAND sub-system
nboot   - boot from NAND device
nm      - memory modify (constant address)
ping    - send ICMP ECHO_REQUEST to network host
printenv- print environment variables
printenv2- print environment variables 2
protect - enable or disable FLASH write protection
rarpboot- boot image via network using RARP/TFTP protocol
reset   - Perform RESET of the CPU
run     - run commands in an environment variable
saveenv - save environment variables to persistent storage
saveenv2- save environment variables 2 to persistent storage
serdes  - display or set SerDes parameters
setenv  - set environment variables
setenv2 - set environment variables 2
sspi    - SPI utility commands
tftpboot- boot image via network using TFTP protocol
version - print monitor version
Comcerto-300 >
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果断编程器。。。

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有编程器,已经把西尔特的280U升级到3000U,应该可以对芯片直接读写,但想用一种在线的方式读出来,板子上有一些排针,但不清楚针的定义。
交流QQ:874687469

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