Differenze tra le versioni di "Chip: USB hid on libcomposite"
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(Creata pagina con 'I succeedeed to configure Chip as a USD-hid device using the libcomposite support. It is just a proof-of-concept. (This example works on my linux kernel see: [[Compile the L...') |
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| (2 versioni intermedie di uno stesso utente non sono mostrate) | |||
| Riga 9: | Riga 9: | ||
</pre> | </pre> | ||
| − | Here is the script to start the service. (more than a script, it is a | + | Here is the script to start the service. (more than a script, it is a voodoo ritual). |
<pre> | <pre> | ||
#!/bin/bash | #!/bin/bash | ||
| Riga 38: | Riga 38: | ||
At the completion of the script there is on chip /dev/hidg0 and the host "sees" a new USB keyboard. | At the completion of the script there is on chip /dev/hidg0 and the host "sees" a new USB keyboard. | ||
| − | The test program presented in the kernel docs works like a charm. | + | The [https://www.kernel.org/doc/Documentation/usb/gadget_hid.txt test program presented in the kernel docs] works like a charm. |
If it is hard to set up the hid service, it is not trivial to stop it, too. | If it is hard to set up the hid service, it is not trivial to stop it, too. | ||
Here is a second script to turn off the hid service. | Here is a second script to turn off the hid service. | ||
| + | |||
<pre> | <pre> | ||
#!/bin/bash | #!/bin/bash | ||
| − | |||
cd /sys/kernel/config/usb_gadget/g1 | cd /sys/kernel/config/usb_gadget/g1 | ||
echo "" > UDC | echo "" > UDC | ||
Versione attuale delle 17:35, 14 feb 2016
I succeedeed to configure Chip as a USD-hid device using the libcomposite support. It is just a proof-of-concept.
(This example works on my linux kernel see: Compile the Linux kernel for Chip: my personal HOWTO)
First of all, remove all the g_* modules. e.g.:
sudo rmmod g_serial
Here is the script to start the service. (more than a script, it is a voodoo ritual).
#!/bin/bash cd /sys/kernel/config/usb_gadget mkdir g1 cd g1 echo "0x1d6b" > idVendor echo "0x0104" > idProduct mkdir strings/0x409 echo "My␣serial" > strings/0x409/serialnumber echo "My␣Vendor" > strings/0x409/manufacturer echo "My␣Product" > strings/0x409/product mkdir functions/hid.usb0 echo 1 > functions/hid.usb0/protocol echo 1 > functions/hid.usb0/subclass echo 8 > functions/hid.usb0/report_length /bin/echo -ne \\x05\\x01\\x09\\x06\\xa1\\x01\\x05\\x07\\x19\\xe0\\x29\\xe7\\x15\\x00\\x25\\x01\\x75\\x01\\x95\\x08\\x81\\x02\\x95\\x01\\x75\\x08\\x81\\x03\\x95\\x05\\x75\\x01\\x05\\x08\\x19\\x01\\x29\\x05\\x91\\x02\\x95\\x01\\x75\\x03\\x91\\x03\\x95\\x06\\x75\\x08\\x15\\x00\\x25\\x65\\x05\\x07\\x19\\x00\\x29\\x65\\x81\\x00\\xc0 > functions/hid.usb0/report_desc mkdir configs/c.1 mkdir configs/c.1/strings/0x409 echo Conf 1 > configs/c.1/strings/0x409/configuration echo 120 > configs/c.1/MaxPower ln -s functions/hid.usb0 configs/c.1 echo musb-hdrc.1.auto > UDC
This script must run as root (e.g. launch it with sudo).
At the completion of the script there is on chip /dev/hidg0 and the host "sees" a new USB keyboard.
The test program presented in the kernel docs works like a charm.
If it is hard to set up the hid service, it is not trivial to stop it, too.
Here is a second script to turn off the hid service.
#!/bin/bash cd /sys/kernel/config/usb_gadget/g1 echo "" > UDC rm configs/c.1/hid.usb0 rmdir configs/c.1/strings/0x409 rmdir configs/c.1 rmdir strings/0x409 rmdir functions/hid.usb0 cd .. rmdir g1