4.42. RNDIS Host - DHCP Client
4.42.1. Overview
This sample project shows USB RNDIS or ECM Host to implement DHCP and automatically assign IP. Connect luat 4G module-air780e module or EC20 module to implement DHCP to automatically assign IP.
4.42.2. Board Setting
development board interconnected to air780e or ec20 throught port USB0.
development board(RNDIS Host) DEBUG port or console port connect to PC.
4.42.3. Example of output log
download the programs to the development board, and connect air780e, the board will show logs as follows
if not, check whether the upper module is powered on
Start cherryusb host usbnet task...
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DHCP example
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[I/USB] EHCI HCIVERSION:0100
[I/USB] EHCI HCSPARAMS:010011
[I/USB] EHCI HCCPARAMS:0006
[I/USB] New high-speed device on Hub 1, Port 1 connected
[I/USB] New device found,idVendor:19d1,idProduct:0001,bcdDevice:0200
[I/USB] The device has 8 interfaces
[I/USB] Enumeration success, start loading class driver
[I/USB] Loading rndis class driver
[I/USB] Ep=01 Attr=02 Mps=512 Interval=00 Mult=00
[I/USB] Ep=82 Attr=02 Mps=512 Interval=00 Mult=00
[I/USB] rndis init success
[I/USB] rndis query OID_GEN_SUPPORTED_LIST success,oid num :22
[W/USB] Ignore rndis query iod:00010101
[W/USB] Ignore rndis query iod:00010102
[W/USB] Ignore rndis query iod:00010103
[W/USB] Ignore rndis query iod:00010104
[I/USB] rndis query iod:00010106 success
[I/USB] rndis query iod:00010107 success
[W/USB] Ignore rndis query iod:0001010a
[W/USB] Ignore rndis query iod:0001010b
[W/USB] Ignore rndis query iod:0001010c
[W/USB] Ignore rndis query iod:0001010d
[W/USB] Ignore rndis query iod:00010116
[W/USB] Ignore rndis query iod:0001010e
[W/USB] Ignore rndis query iod:00010111
[W/USB] Ignore rndis query iod:00010112
[W/USB] Ignore rndis query iod:00010113
[I/USB] rndis query iod:00010114 success
[W/USB] Ignore rndis query iod:00010115
[I/USB] rndis query iod:01010101 success
[I/USB] rndis query iod:01010102 success
[W/USB] Ignore rndis query iod:01010103
[I/USB] rndis query iod:01010104 success
[W/USB] Ignore rndis query iod:01010105
[I/USB] rndis set OID_GEN_CURRENT_PACKET_FILTER success
[I/USB] rndis set OID_802_3_MULTICAST_LIST success
[I/USB] rndis MAC address 20:89:84:6a:96:ab
[I/USB] Register RNDIS Class:/dev/rndis
[I/US[E/USB]B] Create rn do not supdis rx threaport Class:d
0x0a,Subclass:0x00,Protocl:0x00
[E/USB] do not support Class:0x02,Subclass:0x02,Protocl:0x01
[E/USB] do not support Class:0x0a,Subclass:0x00,Protocl:0x00
[E/USB] do not support Class:0x02,Subclass:0x02,Protocl:0x01
[E/USB] do not support Class:0x0a,Subclass:0x00,Protocl:0x00
[E/USB] do not support Class:0x02,Subclass:0x02,Protocl:0x01
[E/USB] do not support Class:0x0a,Subclass:0x00,Protocl:0x00
IPv4 Address : 192.168.10.2
IPv4 Subnet mask : 255.255.255.0
IPv4 Gateway : 192.168.10.1
when the EC20 module is connected, the following information is printed, indicating that the EC20 initialization is successful and the IP is assigned.
[I/USB] New high-speed device on Hub 1, Port 1 connected
[I/USB] New device found,idVendor:2c7c,idProduct:0125,bcdDevice:0318
[I/USB] The device has 6 interfaces
[I/USB] Enumeration success, start loading class driver
[E/USB] do not support Class:0xff,Subclass:0xff,Protocl:0xff
[E/USB] do not support Class:0xff,Subclass:0x00,Protocl:0x00
[E/USB] do not support Class:0xff,Subclass:0x00,Protocl:0x00
[E/USB] do not support Class:0xff,Subclass:0x00,Protocl:0x00
[I/USB] Loading cdc_ecm class driver
[I/USB] CDC ECM mac address 9e: 28: 59: e0: 00: 00
[I/USB] CDC ECM Max Segment Size:1280
[I/USB] Ep=89 Attr=03 Mps=16 Interval=09 Mult=00
[I/USB] Ep=88 Attr=02 Mps=512 Interval=00 Mult=00
[I/USB] Ep=05 Attr=02 Mps=512 Interval=00 Mult=00
[I/USB] Select cdc ecm altsetting: 1
[I/USB] Set CDC ECM packet filter:000c
[I/USB] Register CDC ECM Class:/dev/cdc_ether
[E/USB] do not support Class:0x0a,Subclass:0x00,Protocl:0x00
IPv4 Address : 192.168.225.27
IPv4 Subnet mask : 255.255.255.0
IPv4 Gateway : 192.168.225.1