ELF-RV1126B环境搭建：远程
放假了，设备只有一台，异地访问开发板设备就成了问题，于是奇思妙想。
给飞凌嵌入式提供的ELF-RV1126B插上5V2A电，由于路由器是192.168.1.1，与出厂eth0:192.168.0.232无法通信，首先使用USB转type-C连接开发版和开发机器。
开发机安装ch343ser Linux驱动
Nanjing Qinheng Microelectronics Co., Ltd.
https://github.com/WCHSoftGroup/ch343ser_linux # sudo make install
sudo find /lib/modules/$(uname -r) -name "*ch343*"
sudo dmesg | grep -i "ttyUSB\|ttyACM" # check whether reconginitionsudo usermod -a -G dialout $USER # check permission denied
chy@MINT:~$ lsusb | wc -l
20chy@MINT:~$ lsusb | wc -l
19Bus 001 Device 006: ID 1a86:55d2 QinHeng Electronics USB Dual_Serialchy@MINT:~$ ls /dev/ |grep USB
ttyCH343USB0 #Windows安装ch343ser驱动后，是两个COM；
ttyCH343USB1
[ 34.727997] systemd-journald[352]: Time jumped backwards, rotating.
[ 1771.384610] hid-appletb-bl 0003:05AC:8102.000A: hid_field_extract() called with n (64) > 32! (irq/69-bce_dma)
[ 1784.336437] usb 1-6.3.1: new full-speed USB device number 5 using xhci_hcd
[ 1784.424054] usb 1-6.3.1: New USB device found, idVendor=1a86, idProduct=55d2, bcdDevice= 4.45
[ 1784.424084] usb 1-6.3.1: New USB device strings: Mfr=0, Product=2, SerialNumber=3
[ 1784.424097] usb 1-6.3.1: Product: USB Dual_Serial
[ 1784.424108] usb 1-6.3.1: SerialNumber: 5A83000470
[ 1784.442209] usb_ch343 1-6.3.1:1.0: ttyCH343USB0: usb to uart device
[ 1784.442661] usb_ch343 1-6.3.1:1.0: USB to GPIO device now attached to ch343_iodev8
[ 1784.443881] usb_ch343 1-6.3.1:1.2: ttyCH343USB1: usb to uart device
[ 1785.095021] usbcore: registered new interface driver cdc_acm
[ 1785.095030] cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
[ 1910.980655] usb 1-6.3.1: USB disconnect, device number 5
[ 1910.982204] usb_ch343 1-6.3.1:1.0: ch343 usb device disconnect.
[ 1910.983472] usb_ch343 1-6.3.1:1.2: ch343 usb device disconnect.
[ 1933.324562] usb 1-6.3.1: new full-speed USB device number 6 using xhci_hcd
[ 1933.411926] usb 1-6.3.1: New USB device found, idVendor=1a86, idProduct=55d2, bcdDevice= 4.45
[ 1933.411954] usb 1-6.3.1: New USB device strings: Mfr=0, Product=2, SerialNumber=3
[ 1933.411968] usb 1-6.3.1: Product: USB Dual_Serial
[ 1933.411979] usb 1-6.3.1: SerialNumber: 5A83000470
[ 1933.428735] usb_ch343 1-6.3.1:1.0: ttyCH343USB0: usb to uart device
[ 1933.429287] usb_ch343 1-6.3.1:1.0: USB to GPIO device now attached to ch343_iodev8
[ 1933.430536] usb_ch343 1-6.3.1:1.2: ttyCH343USB1: usb to uart device
# elf-rv1126b-board
elf@elf1126b-debian:~$ cat /etc/os-release
PRETTY_NAME="Debian GNU/Linux 12 (bookworm)"
NAME="Debian GNU/Linux"
VERSION_ID="12"
VERSION="12 (bookworm)"
VERSION_CODENAME=bookworm
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"
ID_LIKE="debian"
RK_BUILD_INFO="root@85d9c321e426 Thu Dec 4 20:40:20 MST 2025"# Linux Machine
chy@MINT:~$ cat /etc/os-release
NAME="Linux Mint"
VERSION="22.2 (Zara)"
ID=linuxmint
ID_LIKE="ubuntu debian"
PRETTY_NAME="Linux Mint 22.2"
VERSION_ID="22.2"
HOME_URL="https://www.linuxmint.com/"
SUPPORT_URL="https://forums.linuxmint.com/"
BUG_REPORT_URL="http://linuxmint-troubleshooting-guide.readthedocs.io/en/latest/"
PRIVACY_POLICY_URL="https://www.linuxmint.com/"
VERSION_CODENAME=zara
UBUNTU_CODENAME=noble
遇到权限问题，当前用户加入分组后，串口访问成功。
为了修改默认的IP，临时匹配我的局域网网段；
elf@elf1126b-debian:~$ ip addr show eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000link/ether ae:2f:74:65:c8:63 brd ff:ff:ff:ff:ff:ffaltname end0inet 192.168.0.232/24 brd 192.168.0.255 scope global noprefixroute eth0valid_lft forever preferred_lft foreverinet6 2409:8a20:7d32:d7e0:9e83:2fee:df46:d72d/64 scope global dynamic noprefixroutevalid_lft 258818sec preferred_lft 172418secinet6 fe80::842f:2edc:6072:6ff4/64 scope link noprefixroutevalid_lft forever preferred_lft forever
------------------------------------------------
sudo ip addr add 192.168.1.100/24 dev eth0
ip addr show eth0
elf@elf1126b-debian:~$ ip addr show eth0
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000link/ether ae:2f:74:65:c8:63 brd ff:ff:ff:ff:ff:ffaltname end0inet 192.168.0.232/24 brd 192.168.0.255 scope global noprefixroute eth0valid_lft forever preferred_lft foreverinet 192.168.1.100/24 scope global eth0valid_lft forever preferred_lft foreverinet6 2409:8a20:7d32:d7e0:9e83:2f ee:df46:d72d/64 scope global dynamic noprefixroutevalid_lft 258763sec preferred_lft 172363secinet6 fe80::842f:2edc:6072:6ff4/64 scope link noprefixroutevalid_lft forever preferred_lft forever
与另外一台192.168.1.13 ssh通讯成功，但此时重新上电将会丢失。至此，已经能够通过开发机从局域网SSH访问开发板，可以移除USB转type-C线（串口访问）。
同时， 我选择长期固化IP，因我没有DHCP的需求。
inet 192.168.0.232/24 scope global eth0 # 出厂默认# 解决出厂IP与路由器不在同一网段的通信问题；elf@elf1126b-debian:~$ cat /etc/rc.local
#!/bin/sh -e
# rc.local - 系统启动时执行的本地脚本# 设置第二IP地址
/sbin/ip addr add 192.168.0.232/24 dev eth0
/sbin/ip addr add 192.168.1.100/24 dev eth0 # 添加第二# 启用网络接口
/sbin/ifconfig eth0 up# 可选：启用其他服务
# /etc/init.d/ssh start
exit 0
为了异地访问，选择部署cpolar，先考虑将芯片模块RTL8821CS以STA模式接入无线网络
elf@elf1126b-debian:~$ nmcli device wifi list
IN-USE BSSID SSID MODE CHAN RATE SIGNAL BARS SECURITY9C:7F:81:E5:1A:BF CMCC-1234-5G Infra 149 405 Mbit/s 67 ▂▄▆_ WPA1 WPA29E:7F:81:95:1A:BD -- Infra 149 405 Mbit/s 64 ▂▄▆_ WPA1 WPA29E:7F:81:45:1A:BD -- Infra 6 195 Mbit/s 39 ▂▄__ WPA1 WPA29C:7F:81:E5:1A:BD CMCC-1234 Infra 6 195 Mbit/s 37 ▂▄__ WPA1 WPA2FC:DD:55:1E:76:D2 midea_ac_1248 Infra 2 65 Mbit/s 30 ▂___ WPA2IN-USE BSSID SSID MODE CHAN RATE SIGNAL BARS SECURITY9C:7F:81:E5:1A:BF CMCC-1234-5G Infra 149 405 Mbit/s 67 ▂▄▆_ WPA1 WPA29E:7F:81:95:1A:BD -- Infra 149 405 Mbit/s 64 ▂▄▆_ WPA1 WPA29E:7F:81:45:1A:BD -- Infra 6 195 Mbit/s 39 ▂▄__ WPA1 WPA29C:7F:81:E5:1A:BD CMCC-1234 Infra 6 195 Mbit/s 37 ▂▄__ WPA1 WPA2
执行
$ sudo nmcli device wifi connect "CMCC-1234" password "你的密码"
Device 'p2p0' successfully activated with 'a8a9cc3c-6de4-4635-8956-47fe8c01bb2a'.
$ ping ping www.elfboard.com -c 3 -I p2p0 # 为什么是p2p0
elf@elf1126b-debian:~$ nmcli device
DEVICE TYPE STATE CONNECTION
p2p0 wifi connected CMCC-1234
eth0 ethernet connected (externally) eth0
lo loopback connected (externally) lo
wlan0 wifi disconnected --
p2p-dev-p2p0 wifi-p2p disconnected --
p2p-dev-wlan0 wifi-p2p disconnected --
安装cpolar及授权
elf@elf1126b-debian:~$ cpolar authtoken XXXXXXXXX你的tokenXXXXXX
Authtoken saved to configuration file: /usr/local/etc/cpolar/cpolar.yml
解决公网域名一直变化的问题
GitHub - Hoper-J/cpolar-connect: A command-line tool for automating cpolar tunnel management and SSH connections. 自动化管理 cpolar 免费版内网穿透连接的命令行工具。
https://github.com/Hoper-J/cpolar-connect ， │ ─── 配置摘要 ───
│ 用户名: 你的用户名
│ 密码: 你的密码
│ 服务器用户: elf #飞凌嵌入式ELF-RV11126B的默认用户名、密码
| 服务器密码： elf
│ 端口: 22
│ 自动连接: 是
chy@MINT:~$ cpolar-connect┌ 正在连接服务器...
◆ 正在认证
│ ✓ 成功登录 cpolar
◆ 获取隧道
│ ✓ 找到: tcp://XXXX:XXX
│
│ ─── 连接摘要 ───
│ 主机: XXXXX.top:XXXX
│ 用户: elf
│ 别名: cpolar-server
│ 端口: 22
│
◆ 测试 SSH
│ ✓ SSH 连接正常
◆ 正在连接
│ SSH 密钥已存在：/home/chy/.ssh/id_rsa_cpolar
│ ✓ SSH 配置已更新
└ 连接已建立！Warning: Permanently added '[34.tcp.cpolar.top]:12376' (ED25519) to the list of known hosts.
bind [127.0.0.1]:22: Permission denied
channel_setup_fwd_listener_tcpip: cannot listen to port: 22
Could not request local forwarding.
Linux elf1126b-debian 6.1.141 #2 SMP Thu Dec 4 18:49:22 MST 2025 aarch64
elf@elf1126b-debian:~$ whoami # elf