Rock3/dev/usb-device-network
ROCK 3 > Development Guide > Usb device network
Contents
Requirements
- ROCK CM3 IO
- USB 3.0 or 2.0 male type A to male type A cable
- Host PC running Linux OS
Software preparation
- Kernel version
USB gadget driver must be enabled to configure usb net.
- Stop conflicting services
So far, Type-C OTG port only supports one Gadget function. To use USB net, need to disable rockchip-adbd service.
root@radxa-cm3-io:~# systemctl stop rockchip-adbd root@radxa-cm3-io:~# systemctl disable rockchip-adbd root@radxa-cm3-io:~# reboot
Load kernel module
- Connect the Radxa CM3 IO to PC with one microUSB to Type-A cable.
- Install kernel module on Radxa CM3 IO
root@radxa-cm3-io:~# modprobe g_ether
root@radxa-cm3-io:~# dmesg -c [ 25.792177] using random self ethernet address [ 25.792239] using random host ethernet address [ 25.794179] usb0: HOST MAC fe:fc:51:10:b2:fa [ 25.794444] usb0: MAC 82:21:a8:1b:f3:4a [ 25.794539] using random self ethernet address [ 25.794589] using random host ethernet address [ 25.794787] g_ether gadget: Ethernet Gadget, version: Memorial Day 2008 [ 25.794819] g_ether gadget: g_ether ready [ 25.797133] dwc2 ff400000.usb: bound driver g_ether [ 25.988410] dwc2 ff400000.usb: new device is high-speed [ 26.068210] dwc2 ff400000.usb: new device is high-speed [ 26.132742] dwc2 ff400000.usb: new address 39 [ 26.154634] g_ether gadget: high-speed config #1: CDC Ethernet (ECM)
Bring up the usb0 device
root@radxa-cm3-io:~# ifconfig usb0 up
Setup USB Network
On ROCK Pi S.
root@radxa-cm3-io::~# IP=10.0.1.1
root@radxa-cm3-io::~# HOST_IP=10.0.1.2
root@radxa-cm3-io::~# ifconfig usb0 $IP netmask 255.255.255.0
root@radxa-cm3-io::~# route
On host PC
radxa@x86_64_pc:~$ HOST_IP=10.0.1.2 radxa@x86_64_pc:~$ sudo ifconfig usb0 $HOST_IP netmask 255.255.255.0
Test the network, on Radxa CM3 IO
root@radxa-cm3-io::~# ping $HOST_IP
Throughout
Radxa CM3 IO ---> PC
radxa@x86_64_pc:~$ iperf3 -s ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- Accepted connection from 10.0.1.1, port 59778 [ 5] local 10.0.1.2 port 5201 connected to 10.0.1.1 port 59780 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 34.4 MBytes 289 Mbits/sec [ 5] 1.00-2.00 sec 36.0 MBytes 302 Mbits/sec [ 5] 2.00-3.00 sec 35.9 MBytes 302 Mbits/sec [ 5] 3.00-4.00 sec 36.0 MBytes 302 Mbits/sec [ 5] 4.00-5.00 sec 36.0 MBytes 302 Mbits/sec [ 5] 5.00-6.00 sec 36.0 MBytes 302 Mbits/sec [ 5] 6.00-7.00 sec 36.0 MBytes 302 Mbits/sec [ 5] 7.00-8.00 sec 36.0 MBytes 302 Mbits/sec [ 5] 8.00-9.00 sec 35.9 MBytes 302 Mbits/sec [ 5] 9.00-10.00 sec 36.0 MBytes 302 Mbits/sec [ 5] 10.00-10.04 sec 1.52 MBytes 301 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate [ 5] 0.00-10.04 sec 360 MBytes 301 Mbits/sec receiver ----------------------------------------------------------- Server listening on 5201 -------------------------- root@radxa-cm3-io:/home/rock# iperf3 -c 10.0.1.2 Connecting to host 10.0.1.2, port 5201 [ 5] local 10.0.1.1 port 59780 connected to 10.0.1.2 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 37.0 MBytes 310 Mbits/sec 0 238 KBytes [ 5] 1.00-2.00 sec 35.8 MBytes 300 Mbits/sec 0 238 KBytes [ 5] 2.00-3.00 sec 36.3 MBytes 304 Mbits/sec 0 238 KBytes [ 5] 3.00-4.00 sec 35.8 MBytes 300 Mbits/sec 0 238 KBytes [ 5] 4.00-5.00 sec 35.8 MBytes 300 Mbits/sec 0 238 KBytes [ 5] 5.00-6.00 sec 36.3 MBytes 304 Mbits/sec 0 238 KBytes [ 5] 6.00-7.00 sec 35.8 MBytes 300 Mbits/sec 0 238 KBytes [ 5] 7.00-8.00 sec 36.3 MBytes 304 Mbits/sec 0 238 KBytes [ 5] 8.00-9.00 sec 35.8 MBytes 300 Mbits/sec 0 238 KBytes [ 5] 9.00-10.00 sec 35.8 MBytes 300 Mbits/sec 0 238 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 361 MBytes 303 Mbits/sec 0 sender [ 5] 0.00-10.04 sec 360 MBytes 301 Mbits/sec receiver iperf Done.
PC ---> Radxa CM3 IO
radxa@x86_64_pc:~$ iperf3 -c 10.0.1.1 Connecting to host 10.0.1.1, port 5201 [ 5] local 10.0.1.2 port 37554 connected to 10.0.1.1 port 5201 [ ID] Interval Transfer Bitrate Retr Cwnd [ 5] 0.00-1.00 sec 19.9 MBytes 167 Mbits/sec 0 107 KBytes [ 5] 1.00-2.00 sec 19.1 MBytes 161 Mbits/sec 0 107 KBytes [ 5] 2.00-3.00 sec 19.4 MBytes 163 Mbits/sec 0 107 KBytes [ 5] 3.00-4.00 sec 19.4 MBytes 163 Mbits/sec 0 107 KBytes [ 5] 4.00-5.00 sec 19.9 MBytes 167 Mbits/sec 0 107 KBytes [ 5] 5.00-6.00 sec 19.1 MBytes 161 Mbits/sec 0 107 KBytes [ 5] 6.00-7.00 sec 19.6 MBytes 165 Mbits/sec 0 107 KBytes [ 5] 7.00-8.00 sec 19.4 MBytes 163 Mbits/sec 0 107 KBytes [ 5] 8.00-9.00 sec 19.4 MBytes 163 Mbits/sec 0 107 KBytes [ 5] 9.00-10.00 sec 19.4 MBytes 163 Mbits/sec 0 107 KBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate Retr [ 5] 0.00-10.00 sec 195 MBytes 163 Mbits/sec 0 sender [ 5] 0.00-10.00 sec 194 MBytes 163 Mbits/sec receiver iperf Done. root@radxa-cm3-io:/home/rock# iperf3 -s ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- Accepted connection from 10.0.1.2, port 37552 [ 5] local 10.0.1.1 port 5201 connected to 10.0.1.2 port 37554 [ 1572.486275] NOHZ: local_softirq_pending 08 [ 1572.832822] NOHZ: local_softirq_pending 08 [ 1572.962856] NOHZ: local_softirq_pending 08 [ 1572.969171] NOHZ: local_softirq_pending 08 [ 1573.022734] NOHZ: local_softirq_pending 08 [ 1573.062681] NOHZ: local_softirq_pending 08 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 19.3 MBytes 162 Mbits/sec [ 1573.496222] NOHZ: local_softirq_pending 08 [ 1573.923641] NOHZ: local_softirq_pending 08 [ 1573.923827] NOHZ: local_softirq_pending 08 [ 1574.085957] NOHZ: local_softirq_pending 08 [ 5] 1.00-2.00 sec 19.3 MBytes 162 Mbits/sec [ 5] 2.00-3.00 sec 19.4 MBytes 162 Mbits/sec [ 5] 3.00-4.00 sec 19.4 MBytes 163 Mbits/sec [ 5] 4.00-5.00 sec 19.7 MBytes 165 Mbits/sec [ 5] 5.00-6.00 sec 19.4 MBytes 162 Mbits/sec [ 5] 6.00-7.00 sec 19.4 MBytes 163 Mbits/sec [ 5] 7.00-8.00 sec 19.4 MBytes 163 Mbits/sec [ 5] 8.00-9.00 sec 19.5 MBytes 163 Mbits/sec [ 5] 9.00-10.00 sec 19.5 MBytes 163 Mbits/sec [ 5] 10.00-10.00 sec 36.8 KBytes 177 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate [ 5] 0.00-10.00 sec 194 MBytes 163 Mbits/sec receiver ----------------------------------------------------------- Server listening on 5201