I am working on a custom hardware for an Android-tablet using the VNC2 chip.
On the VNC2 chip I have flashed some custom firmware I have made.
I have set the USB VendorID to 0403 and USB ProductId to 6001.
I also have an Android-app I am working on. I have added the following to the in the manifest:
<intent-filter>
<action android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" />
</intent-filter>
<meta-data android:name="android.hardware.usb.action.USB_DEVICE_ATTACHED" android:resource="@xml/device_filter" />
device_filter.xml:
<?xml version="1.0" encoding="utf-8"?>
<resources>
<usb-device/>
</resources>
My goal is that this app should start if I connect the USB device. This does not work however. I have downloaded a tool from Google Play called "USB Host Controller" and this app showed me that the USB device was connected so some parts seem to work.
I have also seen output in logcat while connecting the device:
I/USB3G ( 91): event { 'add', '/devices/platform/sw_hcd_host0/usb1/1-1', 'usb', '', 189, 12 }
I/USB3G ( 91): path : '/sys/devices/platform/sw_hcd_host0/usb1/1-1'
I/USB3G ( 91): VID :size 5,vid_path '/sys/devices/platform/sw_hcd_host0/usb1/1-1/idVendor',VID '0403
I/USB3G ( 91): '.
I/USB3G ( 91): PID :size 5,Pid_path '/sys/devices/platform/sw_hcd_host0/usb1/1-1/idProduct',PID '6001
I/USB3G ( 91): '.
I/USB3G ( 91): cmd=/system/etc/usb_modeswitch.sh /system/etc/usb_modeswitch.d/0403_6001 &,
I/USB3G ( 91): excute ret : 0,err:No such file or directory
Digging into modeswitch it seem like a tool to switch state on mainly USB 3G modems. My first guess is that I have a very crippled image on my device (Allwinner A10 based). But it might also be some error in my app even though I find it unlikely. According to my understanding I should be presented with some kind of dialog when inserting an OTG hardware regardless if I have an app installed with a matching intent-filter, or am I wrong?
Any ideas would be appreciated. I can change the apk in any way if required. The tablet is rooted and I can change files in any way possible. Would be happy to try any ideas that you have.