Hi i am using local made lpc2148 micro controller development b0oard. i am copy the MBC2148 keil HID program and downloaded in to the micro controller.my board is working in pull speed USB mode(D+ pull up resister 1500 ohms) .when i connect the my board to PC(windows XP SP2)it shows some error pop-up message that is "one of the USB device attached to this computer has malfunctioned and windows dose not recognize it" what would be the problem.please help me
In over qpqlpc2148 board p0.23 is open and not conected to vcc and gnd. So i make this pin high by setting p0.23 using IO0SET |=0x00800000. When connected to pc it shows same error msg that is One of the device malfuctioning windows.along with it shows some msg new hardware found,unknown device. Then i unplug the cable and once again pc it shows device ready to use and again and again shows same error msg.and i also sean the dvice property using device manager vid and pid 0000 and enumaration type usb device type unknown. Im totaly confused whether it is software or hardware problem
any one help me
Once again, did you install the Keil HID application program on your PC???? This driver is required to use the Keil HID example as written.
What is that where it is available .how to instal that
We'll take that as a "No", then?
Surely, the documentation for the example must tell you this?!
Look in the Keil ARM Utilities Folder. Read carefully the instructions for installing the HIDClient executable on your PC. If you do not understand the fact that you need an application driver for your USB device, then you need to read Jan Axelson's books at http://www.lvr.com. Even though the WINDOWS HID driver exists on your PC, you still need an application to use the HID driver.