UsbHidWrite

./UsbHidWrite -?

Writing data from file to USB:

Example: ./UsbHidWrite -v 0x1d50 -p 0x607a -i 0 -e 1 -f Makefile
-v - Vendor ID
-p - Product ID
-i - Interface number
-e - Endpoint
-f - File
-P - Pattern bytes
-N - Patterns count
-l - Pipe file
-W - display width
-H - display height
-b - Pixel format. Byte on pixel
For linux: echo 2702700 > /proc/sys/fs/pipe-max-size
For linux: echo 1000 > /sys/module/usbcore/parameters/usbfs_memory_mb

Change pipe max size

Display width = 1092
Display height = 825
Display bytes on pixel = 3
Total byte 1092 * 825 * 3 = 2702700

echo "2702700" > /proc/sys/fs/pipe-max-size

Change usb buffer size

echo 1000 > /sys/module/usbcore/parameters/usbfs_memory_mb

Add usb rules in udev

cp 99-fx3_usb_display.rules /etc/udev/rules.d/99-fx3_usb_display.rules

Example pipe from gstreamer to usb:

gst-launch-1.0 videotestsrc pattern=13 num-buffers=1 ! video/x-raw,width=1092,height=825,format=RGB !
filesink location=pipe1 | sudo ./UsbHidWrite -v 0x04b4 -p 0x00f1 -i 0 -e 1 -l pipe1 -W 1092 -H 825 -b 3