1.准备文件：
从install.img/omv 中获取4个文件
emmc.uImage，bluecore.audio，rescue.emmc.dtb，rescue.root.emmc.cpio.gz_pad.img
和install.img 一起放入FAT32 U盘根目录
2.按住ESC 上电，进入bootcode cmd mode
3.有两种途径救砖
a.USB 途径：
usb start
成功探测到U盘会打出这句
inquiry returns 0
1 Storage Device(s) found
fatload usb 0:1 0x03000000 emmc.uImage
fatload usb 0:1 0x02100000 rescue.emmc.dtb
fatload usb 0:1 0x0f900000 bluecore.audio.b
fatload usb 0:1 0x01b00000 bluecore.audio.b
fatload usb 0:1 0x02200000 rescue.root.emmc.cpio.gz_pad.img
boot all
等升级完成后自动重启
fatload usb 0:1 0x01b00000 bluecore.audio.b
b.TFTP 途径
设置参数：
sysparam add netmask 255.255.255.0
sysparam add gatewayip 192.168.0.1
sysparam add ipaddr 192.168.0.120
sysparam add serverip 192.168.0.139
sysparam save
2、相当于1295中的go ru
net tftp 0x01b00000 192.168.11.244 bluecore.audio
net tftp 0x02100000 192.168.11.244 rescue.emmc.dtb
net tftp 0x03000000 192.168.11.244 emmc.uImage
net tftp 0x02200000 192.168.11.244 rescue.root.emmc.cpio.gz_pad.img
net tftp 0x01b00000 192.168.0.139 bluecore.audio
net tftp 0x0F900000 192.168.0.139 bluecore.audio.b
net tftp 0x02100000 192.168.0.139 rescue.emmc.dtb
net tftp 0x03000000 192.168.0.139 emmc.uImage
net tftp 0x02200000 192.168.0.139 rescue.root.emmc.cpio.gz_pad.img
boot all
net tftp 0x0F900000 192.168.0.101 bluecore.audio.enc.A00
net tftp 0x02140000 192.168.0.101 rescue.emmc.dtb
net tftp 0x03000000 192.168.0.101 emmc.uImage
net tftp 0x30000000 192.168.0.101 rescue.root.emmc.cpio.gz_pad.img
boot all
备注：
有时候因为上一版升级时放入的bluecore 不适用，会导致没有输出画面
这时PS 看到如下的进程表示正在升级
2378 0 /tmp/alsadaemon
2387 0 /tmp/installUI/install_UI.exe /mnt/usb/install.img
2696 0 ps
空片：
升‘d/g/r’ mode.
c) Press ‘h’ key to send ‘RTD1295_hwsetting_BOOT_2DDR4_8Gb_s2133.bin’
d) Copy and Paste below commands to console.
1295
s98007078
00000000
1296烧写下面就行
s98007058
01500000
f) Press ‘d’ key and select ‘dvrboot.exe.bin’ to transfer the bootcode.
g) After the bootcode is sent, press ‘g’ key to write bootcode to the Flash.级hwsetting
b) Press and hold ‘CTRL’ and ‘q’ key simultaneously, and then power on 129x platform. The system will go to
B00
原文：https://www.cnblogs.com/yizhier/p/11302056.html
