本篇教程基于ShiMetaPi研发的FPGA+ARM开发板——GM-3568JHF展开
1. WIFI模块概述
GM-3568JHF开发板集成了RTL8723DU无线网络模块，提供了完整的IEEE 802.11 b/g/n无线网络连接功能。该模块通过USB接口与主控芯片连接，支持2.4GHz频段的无线通信，为开发板提供了灵活的无线网络接入能力。
1.1 RTL8723DU模块技术规格
1.2 性能指标
2. WIFI连接配置
开发板使用RTL8723DU模块，系统已默认适配好WIFI驱动和相关软件组件。
2.1 连接WIFI
如图所示，找到系统右上角点击网络图标连接WIFI
使用ifconfig命令查看ip地址等信息
root@linaro-alip:/# ifconfig
···
wlx78228877b4a5: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.137.149 netmask 255.255.255.0 broadcast 192.168.137.255
inet6 fe80::d175:3cd1:73ca:ecc8 prefixlen 64 scopeid 0x20<link>
ether 78:22:88:77:b4:a5 txqueuelen 1000 (Ethernet)
RX packets 69 bytes 954099 (931.7 KiB)
RX errors 0 dropped 143 overruns 0 frame 0
TX packets 72 bytes 116372 (113.6 KiB)
TX errors 0 dropped 23 overruns 0 carrier 0 collisions 02.2 连通性测试
执行如下命令查看获取的IP地址，并通过ping命令测试开发板与PC机通信是否正常。192.168.49.85为PC实际的IP地址，请确保开发板与PC机在同一局域网内。
root@linaro-alip:/# ping 192.168.49.85 -I wlx78228877b4a5 -c 8
ping 192.168.49.85 -I wlx78228877b4a5 -c 8
PING 192.168.49.85 (192.168.49.85) from 192.168.137.149 wlx78228877b4a5: 56(84) bytes of data.
64 bytes from 192.168.49.85: icmp_seq=1 ttl=127 time=5.14 ms
64 bytes from 192.168.49.85: icmp_seq=2 ttl=127 time=3.66 ms
64 bytes from 192.168.49.85: icmp_seq=3 ttl=127 time=2.83 ms
64 bytes from 192.168.49.85: icmp_seq=4 ttl=127 time=2.81 ms
64 bytes from 192.168.49.85: icmp_seq=5 ttl=127 time=9.44 ms
64 bytes from 192.168.49.85: icmp_seq=6 ttl=127 time=2.77 ms
64 bytes from 192.168.49.85: icmp_seq=7 ttl=127 time=3.46 ms
64 bytes from 192.168.49.85: icmp_seq=8 ttl=127 time=3.09 ms
--- 192.168.49.85 ping statistics ---
8 packets transmitted, 8 received, 0% packet loss, time 7011ms
rtt min/avg/max/mdev = 2.771/4.150/9.442/2.128 ms2.3 TCP带宽测试
如下使用iperf3工具测试开发板与PC机的网络通信带宽。
服务端
在开发板上联网安装iperf3工具，执行如下命令：
root@linaro-alip:/# sudo apt update
root@linaro-alip:/# sudo apt install iperf3
开发板做服务端，执行以下命令:
root@linaro-alip:/# iperf3 -s
-----------------------------------------------------------
Server listening on 5201 (test #1)
-----------------------------------------------------------客户端
windows的iperf3工具可以在测试工具包中获取。
在windows系统中打开powershell，进入iperf3工具所在路径下windows做客户端发送数据，执行以下命令：
.\iperf3.exe -c 192.168.137.149 // 192.168.137.149 为服务端 IP 地址2.4 测试结果
服务端
root@linaro-alip:/# iperf3 -s
-----------------------------------------------------------
Server listening on 5201 (test #1)
-----------------------------------------------------------
Accepted connection from 192.168.137.1, port 65396
[ 5] local 192.168.137.149 port 5201 connected to 192.168.137.1 port 65397
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 4.88 MBytes 40.9 Mbits/sec
[ 5] 1.00-2.00 sec 5.40 MBytes 45.3 Mbits/sec
[ 5] 2.00-3.00 sec 5.22 MBytes 43.8 Mbits/sec
[ 5] 3.00-4.00 sec 5.36 MBytes 45.0 Mbits/sec
[ 5] 4.00-5.00 sec 5.14 MBytes 43.1 Mbits/sec
[ 5] 5.00-6.00 sec 5.22 MBytes 43.8 Mbits/sec
[ 5] 6.00-7.00 sec 5.40 MBytes 45.3 Mbits/sec
[ 5] 7.00-8.00 sec 5.12 MBytes 43.0 Mbits/sec
[ 5] 8.00-9.00 sec 5.38 MBytes 45.1 Mbits/sec
[ 5] 9.00-10.00 sec 5.24 MBytes 43.9 Mbits/sec
[ 5] 10.00-10.05 sec 266 KBytes 45.9 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.05 sec 52.6 MBytes 43.9 Mbits/sec receiver
-----------------------------------------------------------客户端
3. 命令行WIFI配置
3.1 使用wpa_supplicant连接WIFI
1）扫描可用网络
# 启动 WIFI 接口
sudo ifconfig wlx78228877b4a5 up
# 扫描可用的 WIFI 网络
sudo iwlist wlx78228877b4a5 scan | grep ESSID
# 或使用 iw 命令
sudo iw dev wlx78228877b4a5 scan | grep SSID2）创建wpa_supplicant配置文件
# 创建配置文件
sudo nano /etc/wpa_supplicant/wpa_supplicant.conf
# 添加以下内容
ctrl_interface=/var/run/wpa_supplicant
ctrl_interface_group=0
update_config=1
country=CN
# WPA/WPA2-PSK 网络配置
network={
ssid="YourWiFiName"
psk="YourPassword"
key_mgmt=WPA-PSK
priority=1
}
# 开放网络配置
network={
ssid="OpenWiFi"
key_mgmt=NONE
priority=2
}
# WEP 网络配置
network={
ssid="WEPNetwork"
wep_key0="your_wep_key"
key_mgmt=NONE
wep_tx_keyidx=0
}3）连接WIFI网络
# 启动 wpa_supplicant
sudo wpa_supplicant -B -i wlx78228877b4a5 -c /etc/wpa_supplicant/wpa_supplicant.conf
# 获取 IP 地址
sudo dhclient wlx78228877b4a5
# 检查连接状态
wpa_cli -i wlx78228877b4a5 status3.2 NetworkManager管理WIFI
命令行工具nmcli
# 查看 WIFI 状态
nmcli radio wifi
# 扫描 WIFI 网络
nmcli dev wifi list
# 连接 WIFI 网络
nmcli dev wifi connect "SSID" password "PASSWORD"
# 查看已保存的连接
nmcli connection show
# 断开 WIFI 连接
nmcli dev disconnect wlx78228877b4a5
# 删除已保存的连接
nmcli connection delete "SSID"4. WIFI热点模式(AP模式)
4.1 安装hostapd
sudo apt-get update
sudo apt-get install hostapd dnsmasq4.2 配置hostapd
# 创建 hostapd 配置文件
sudo nano /etc/hostapd/hostapd.conf
# 添加以下内容
interface=wlx78228877b4a5
driver=nl80211
ssid=GM-3568JHF-AP
hw_mode=g
channel=7
wmm_enabled=0
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
wpa=2
wpa_passphrase=12345678
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP4.3 配置DHCP服务
# 备份原配置
sudo cp /etc/dnsmasq.conf /etc/dnsmasq.conf.backup
# 编辑 dnsmasq 配置
sudo nano /etc/dnsmasq.conf
# 添加以下内容
interface=wlx78228877b4a5
dhcp-range=192.168.4.2,192.168.4.20,255.255.255.0,24h4.4 配置网络接口
# 设置静态 IP
sudo ifconfig wlx78228877b4a5 192.168.4.1 netmask 255.255.255.0
# 启用 IP 转发
echo 1 | sudo tee /proc/sys/net/ipv4/ip_forward
# 配置 NAT 规则
sudo iptables -t nat -A POSTROUTING -o end0 -j MASQUERADE
sudo iptables -A FORWARD -i end0 -o wlx78228877b4a5 -m state --state RELATED,ESTABLISHED -j ACCEPT
sudo iptables -A FORWARD -i wlx78228877b4a5 -o end0 -j ACCEPT4.5 启动热点服务
# 启动 hostapd
sudo hostapd /etc/hostapd/hostapd.conf &
# 启动 dnsmasq
sudo systemctl start dnsmasq
# 检查服务状态
sudo systemctl status hostapd
sudo systemctl status dnsmasq5. 故障排除
5.1 WIFI模块无法识别
检查步骤:
# 检查 USB 设备
lsusb | grep Realtek
# 检查内核模块
lsmod | grep rtl
# 手动加载驱动
sudo modprobe rtl8xxxu
# 检查固件文件
ls /lib/firmware/rtlwifi/5.2 无法连接WIFI网络
可能原因和解决方案:
# 检查网络接口状态
ip link show wlx78228877b4a5
# 重启网络接口
sudo ifconfig wlx78228877b4a5 down
sudo ifconfig wlx78228877b4a5 up
# 检查 wpa_supplicant 日志
sudo journalctl -u wpa_supplicant
# 重新配置网络
sudo wpa_cli -i wlx78228877b4a5 reconfigure5.3 信号弱或连接不稳定
优化建议:
# 检查信号强度
iwconfig wlx78228877b4a5 | grep "Signal level"
# 扫描信道使用情况
sudo iwlist wlx78228877b4a5 scan | grep Frequency
# 更换信道（AP 模式）
sudo iwconfig wlx78228877b4a5 channel 6
# 调整发射功率
sudo iwconfig wlx78228877b4a5 txpower 205.4 网络速度慢
诊断和优化:
# 检查当前连接速率
iwconfig wlx78228877b4a5 | grep "Bit Rate"
# 检查网络拥塞
ping -c 10 8.8.8.8
# 使用 iperf3 测试带宽
iperf3 -c speedtest.server.com
# 优化 TCP 窗口大小
echo 'net.core.rmem_max = 16777216' >> /etc/sysctl.conf
echo 'net.core.wmem_max = 16777216' >> /etc/sysctl.conf5.5 热点模式问题
常见问题解决:
# 检查 hostapd 状态
sudo systemctl status hostapd
# 查看 hostapd 日志
sudo journalctl -u hostapd
# 检查防火墙设置
sudo iptables -L
# 重启相关服务
sudo systemctl restart hostapd
sudo systemctl restart dnsmasq原文链接：https://forum.shimetapi.cn/wiki/zh/fpga-arm/GM-3568JHF/Peripherals/ch04-WIFI.html
扫一扫
1360
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
