• Win HID ReadFile
    Hi out there, i've encountered a strange situation while trying some HID stuff. When a in report is issued i can see the full report on the bus. The hostapp using ReadFile() and Marshal.Copy() only...
  • USBSER.SYS quirks explained
    Hi, I have been wrestling with Microsoft USBSER.SYS as my host driver for an MDK-PRO based Atmel project. We are using the USB CDC ACM middleware from Keil. (4.73 source) I have determined a...
  • Three USBCDC Interfaces support in usbser.sys ?
    I want to know that if USBCDC with three or more interfaces is supported by using usbser.sys. I can see three VirtualCOM in PC, but one of them shows "not used" in Windows Device Manager. So I can't...
  • USB CDC class problem with Windows usbser.sys
    Hoping to get some expert advice here, Have an embedded USB application running on a Cortex M4. Application uses full-speed USB and is based on a Freescale-provided CDC USB sample project. My bulk...
  • Reading Byte in a Port
    Hi everyone! I am new to keil and wanted to know how do I read a byte in a port. For example, I want to read the port's value. I know in a port have 8-bit and I want to be able to write a code which...