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Difference between revisions of "ECE497 Notes on systemd"

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m (Gadgets)
m (Gadgets)
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is what creates the info.txt file.
 
is what creates the info.txt file.
  
  beagle$ mount /dev/mmcblk0p1 /mnt
+
  beagle$ '''mount /dev/mmcblk0p1 /mnt'''
  
 +
Here's a way to see what gadgets are out there
 +
 +
beagle$ '''systemctl --all | grep gadget'''
 +
sys-devi...et-usb0.device loaded active  plugged      /sys/devices/platform/omap/musb-ti81xx/musb-hdrc.0/gadget/net/usb0
 +
network-...t-init.service loaded active  exited        Start USB Ethernet gadget
 +
storage-...t-init.service loaded inactive dead          Start usb mass storage gadget
 +
udhcpd.service            loaded active  running      DHCP server for USB0 network gadget
 +
 +
Where
 +
'''network-...t-init.service''' = '''network-gadget-init.service'''
 +
'''storage-...t-init.service''' = '''storage-gadget-init.service'''
 +
 +
'''/etc/udhcpd.conf''' is what assigned 192.168.7.1 to the host computer.
 +
 +
To stop the ethernet over USB and start the storage over USB
 +
 +
beagle$ '''/bin/systemctl stop  storage-gadget-init.service'''
 +
beagle$ '''/bin/systemctl start network-gadget-init.service'''
 +
 +
To go the other way:
 +
 +
beagle$ '''g-ether-start-service.sh'''
 +
 
{{YoderFoot}}
 
{{YoderFoot}}

Revision as of 22:27, 12 July 2012

thumb‎ Embedded Linux Class by Mark A. Yoder


The new BeagleImages use systemd for user space initialization.

Here, here and here are some tutorials that look good.

Here is information on runlevels.

Here is a nice list of useful commands.

Tips and Tricks

Gadgets

I found these gadgets

network-gadget-init.service  storage-gadget-init.service

in

/lib/systemd/system
/usr/bin/update-image-info-on-mmcblk0p1.sh

is what creates the info.txt file.

beagle$ mount /dev/mmcblk0p1 /mnt

Here's a way to see what gadgets are out there

beagle$ systemctl --all | grep gadget
sys-devi...et-usb0.device loaded active   plugged       /sys/devices/platform/omap/musb-ti81xx/musb-hdrc.0/gadget/net/usb0
network-...t-init.service loaded active   exited        Start USB Ethernet gadget
storage-...t-init.service loaded inactive dead          Start usb mass storage gadget
udhcpd.service            loaded active   running       DHCP server for USB0 network gadget

Where

network-...t-init.service = network-gadget-init.service
storage-...t-init.service = storage-gadget-init.service

/etc/udhcpd.conf is what assigned 192.168.7.1 to the host computer.

To stop the ethernet over USB and start the storage over USB

beagle$ /bin/systemctl stop  storage-gadget-init.service
beagle$ /bin/systemctl start network-gadget-init.service

To go the other way:

beagle$ g-ether-start-service.sh



thumb‎ Embedded Linux Class by Mark A. Yoder