usb touchscreen programming

pradeepps · 07-29-2008, 12:06 PM

Hi,

I am trying to interface an iLCD touchscreen display which has an usb interface. The device shows up as /dev/hiddev0 and I am able to get the device info by ioctl in HIDIOCGDEVINFO. But how do I read or send commands to the device?

I am using RHEL 5 and 2.6.18 kernel. I am programming in C and trying to send commands and read the inputs from the screen. What I would really like to know is if I can use file streaming for that purpose. If not, is there any usb hid driver I need to install?

ne pas · 07-30-2008, 07:46 AM

Go to the vendors product page, download the "iLCD Command Set" PDF file, in the "Sample Source Code" chapter you will find links to two source code examples, one for serial/usb and one for I2C.
Studying the source code should give you a first insight on how to communicate with your iLCD.