I can NOT get this example to work? I have been using the MCB2140 for several weeks, no problem there. I can open the HID project in uVision3, compile it, download it, run it, step thru it. Then I remove the USB cable , wait 10 seconds (yes, I read and followed the instructions), plug the USB cable back in and my PC (running XP) says "USB Device Not Recogonized" When I go into the device properties, the Device status is: " No drivers are installed for this device." Has anybody else had this problem? Am I missing something obvious? I did not modify the HID code at all, should I? If anyone can pass along ANY kind of hint, tip or otherwise useful information, I would really appreciate it. Thanks, Dave
"If anyone can pass along ANY kind of hint" There was some recent discussion of problems with the USB examples - try the Search
Which operating system are you using? Reinhard
Thanks for the reply. There has been some trouble reported with the mass storage example, but not the HID example. My main PC as I stated in my initial post is running Windows XP. I have also verified the same behavior on a different PC running 2000. This is my first attempt at using USB, so I was really hoping to get up to speed using the MCB2140 and this HID example. I'm really not sure where to start here. I guess I need to start probing the lines and looking at what actual data is being sent back and forth? Thanks, Dave
We never had problems with the HID example: - MCB2140 Jumpers (VR, DP-, DP+: On) - use the prebuilded object file - download the example to Flash - remove USB cable & JTAG Interface - reconnect the USB (after 10s) Maybe you should also download the latest version 2.40 from http://www.keil.com (just to make sure that you have up-to-date software). Reinhard
Dave; This does not address your question directly but it will help you complete your project. As Dan Henry has pointed out is the forum, http://www.usbee.com has an excellent tool for debugging serial/usb comm of this type. A scope is great but in your project you will need to record a data stream over several seconds. I have this tool at one of my customers. It has saved many hours of head scratching. Good tools don't cost, they save. No. I do not sale any tools. Bradfrod
Al, Thanks for the suggestion, I can't believe I've never been to this site before. It looks like really good stuff. I will be reading frantically today. Thanks, Dave
Hello, I have triple checked all the jumpers. I have downloaded the latest compiler and recieved a new Liscense ID code. The CA compiler is V2.32a. I downloaded the zip file again and tried sending the precompiled object file. Same result??? Ok I just tried it one more time with the JTAG(ULINK) removed and uVision closed. IT WORKS!!!!!!!!!!!!!!!!!!!!!!!!!!!! Thanks for everyones help and patience. Now I guess I have to get some real work done, no excuses. Thanks Again, Dave B.