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google-coral / coralmicro

Source code for Coral Dev Board Micro
Apache License 2.0
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How can I connect a coral dev board micro to a coral dev board? #37

Open dylan-leslie opened 1 year ago

dylan-leslie commented 1 year ago

Description

What I am trying to achieve I would like to use a coral dev board as a host which can run some modified python example scripts as a client and receive image data from three USB connected coral dev board microcontrollers and store image data on the client.

Some context

For example, I would like to flash three coral dev board microcontrollers with the camera_streaming.cc example and give them each a unique IP address (192.168.101.10, 192.168.102.10 and 192.168.103.10). Like so:

python3 scripts/flashtool.py -e camera_streaming_rpc --subapp camera_streaming_rpc_usb --usb_ip_address 192.168.101.10
python3 scripts/flashtool.py -e camera_streaming_rpc --subapp camera_streaming_rpc_usb --usb_ip_address 192.168.102.10
python3 scripts/flashtool.py -e camera_streaming_rpc --subapp camera_streaming_rpc_usb --usb_ip_address 192.168.103.10

Then run a python script on a coral dev board which acts as a client to request images from each coral microcontroller.

I have the above functionality working when connecting the three microcontrollers to my ubuntu 20 machine (I can run a python client that makes GET requests to each coral microcontroller and store the response data).

My main problem When connecting a coral dev board microcontroller to a coral dev board I am unable to see any devices on usb0 or usb1 the same way I can on an ubuntu 20 machine. I tried to follow the instructions here by configuring the /etc/NetworkManager/system-connections/gadget0.nmconnection and /etc/NetworkManager/system-connections/gadget1.nmconnection files to the same domains as the USB ip address that I flashed. E.g

mendel@zippy-tang:~$ sudo cat /etc/NetworkManager/system-connections/gadget1.nmconnection 
[connection]
id=gadget1
uuid=6c85437c-ba59-4522-baf0-bf68e006b601
type=ethernet
interface-name=usb1
permissions=

[ethernet]
mac-address-blacklist=

[ipv4]
address1=192.168.103.2/24
dns-search=
method=manual

[ipv6]
addr-gen-mode=stable-privacy
dns-search=
method=auto

However the above has no success as I still cannot ping the board and receive a response.

mendel@zippy-tang:~$ ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host 
       valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether 28:bd:89:bc:a0:96 brd ff:ff:ff:ff:ff:ff
    inet 192.168.178.70/24 brd 192.168.178.255 scope global dynamic noprefixroute eth0
       valid_lft 7120sec preferred_lft 7120sec
    inet6 fe80::797c:2a5c:c17b:6afa/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 3000
    link/ether 28:bd:89:bc:a0:97 brd ff:ff:ff:ff:ff:ff
    inet 192.168.178.141/24 brd 192.168.178.255 scope global dynamic noprefixroute wlan0
       valid_lft 7120sec preferred_lft 7120sec
    inet6 fe80::3f3d:7c3e:c48c:a54f/64 scope link noprefixroute 
       valid_lft forever preferred_lft forever
4: p2p0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 3000
    link/ether 00:0a:f5:89:89:81 brd ff:ff:ff:ff:ff:ff
5: usb0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
    link/ether 02:22:78:0d:f6:df brd ff:ff:ff:ff:ff:ff
    inet 192.168.103.100/24 brd 192.168.103.255 scope global noprefixroute usb0
       valid_lft forever preferred_lft forever
    inet6 fe80::2d12:dfdd:6c07:530a/64 scope link tentative noprefixroute 
       valid_lft forever preferred_lft forever
6: usb1: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
    link/ether 02:22:78:0d:f6:de brd ff:ff:ff:ff:ff:ff
    inet 192.168.102.2/24 brd 192.168.102.255 scope global noprefixroute usb1
       valid_lft forever preferred_lft forever
    inet6 fe80::549d:3a3d:cd32:1636/64 scope link tentative noprefixroute 
       valid_lft forever preferred_lft forever
mendel@zippy-tang:~$ ping 192.168.103.10
PING 192.168.103.10 (192.168.103.10) 56(84) bytes of data.
From 192.168.103.100 icmp_seq=1 Destination Host Unreachable
From 192.168.103.100 icmp_seq=2 Destination Host Unreachable
From 192.168.103.100 icmp_seq=3 Destination Host Unreachable
^C
--- 192.168.103.10 ping statistics ---
4 packets transmitted, 0 received, +3 errors, 100% packet loss, time 83ms

Here is the output of netstat as well

mendel@zippy-tang:~$ sudo netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
0.0.0.0         192.168.178.1   0.0.0.0         UG        0 0          0 eth0
0.0.0.0         192.168.178.1   0.0.0.0         UG        0 0          0 wlan0
192.168.102.0   0.0.0.0         255.255.255.0   U         0 0          0 usb1
192.168.103.0   0.0.0.0         255.255.255.0   U         0 0          0 usb0
192.168.178.0   0.0.0.0         255.255.255.0   U         0 0          0 eth0
192.168.178.0   0.0.0.0         255.255.255.0   U         0 0          0 wlan0

Not sure if what I'm doing is completely wrong so I figured it would be best to ask for any help.

Click to expand! ### Issue Type Support ### Operating System Mendel Linux ### Coral Device Dev Board, Dev Board Micro ### Other Devices _No response_ ### Programming Language _No response_ ### Relevant Log Output _No response_
hjonnala commented 1 year ago

On dev board please try the below steps to connect to dev board micro. Thanks!!

sudo apt-get install screen
sudo usermod -aG plugdev,dialout $USER
sudo reboot now
screen /dev/ttyACM0 115200
dylan-leslie commented 1 year ago

Hi @hjonnala, thanks for your response. Apologies maybe I should've been more specific, but I would specifically like to establish a connection with the microcontroller using the USB network interfaces on the coral dev board. Such as, usb0 usb1 usb2 etc.

screen will help me connect to the board and monitor the serial output but doesn't help me for my problem.

I noticed yesterday some differences between my laptop (running ubuntu 20) and the coral dev board for the USB ethernet interfaces. The main difference being the output of cat /sys/kernel/debug/usb/devices for both devices like follows: laptop: I:* If#= 2 Alt= 0 #EPs= 2 Cls=02(comm.) Sub=0c Prot=07 Driver=cdc_eem coral dev board: I:* If#= 2 Alt= 0 #EPs= 2 Cls=02(comm.) Sub=0c Prot=07 Driver=(none)

This led me to find this on the coral dev board after running zcat /proc/config.gz | grep -i 'cdc_eem'

# CONFIG_USB_NET_CDC_EEM is not set

Is this what I would need to set to allow the coral dev board to communicate with the coral micro over the usb ethernet interface?

Thanks again for your help.