Hi,
I want to exchange information between an AT91SAM7X256 and a PC through USB. The MCU has the USB transceiver inside, and there is NO USB-to-serial conversion involved, because the data is consumed inside the MCU. There is no UART involved.
I don't want to write any code at the host side. At the most, editing and using a ".inf" file. So, I 'm trying to take advantage of one of the existing standard classes, like Communication Device Class (CDC), and probably also the Abstract Control Model (ACM) within it.
Is there any driver, already installed in my PC as part of my Windows XP, better suited for my need than "usbser.sys"? Is there any ".sys" file in Windows that allows communication between the PC and a USB device but without implying USB-to-serial conversion, and without having having to deal, at the device, with functions that don't make sense in this simpler application?
I was about to use that one, but the CDC requests SET_LINE_CODING and SET_CONTROL_LINE_STATE would do nothing at the device side, and GET_LINE_CODING would have to return information (about baud rate, stop bits, parity, data bits) which tells nothing about the real operation of the device.
Thank you, Bill