• SERIAL NUMBER EXPIRED
    Hi, warning C500: SERIAL NUMBER EXPIRED I get this message, if i try to compile. How can i fix that? Do i have to buy a new license? Please help me! Thanks!
  • Serial Number Expired
    I have encountered serial number expired. No matter what I changed to the source code, the hex file generated is still the same. What happen?
  • WARNING C500 (PORT IS BUSY)
    Dear all, When I type, C:/Keil/C51/BIN/C51 foo.c DB OE NOCOND CD SB WL(1) NOAM INCDIR(a long list of include dir;) Error Message: C51 COMPILER V7.20 - SN: C1S7P-60655E COPYRIGHT KEIL ELEKTRONIK...
  • warning C500: MISSING DEVICE (COMMUNICATIONS ERROR)
    I am getting this warning and it is for all the files. MAINPROC.C(1): warning C500: MISSING DEVICE (COMMUNICATIONS ERROR) Can any one tell throw some light? It was working fine till yesterday. ...
  • C500 compilation error
    Hi, I am developing Cypress USB FX2 firmware and using Keil IDE.While compiling my code I am facing following warning : WARNING C500 : MISSING DEVICE :SECURITY KEY NOT FOUND.. I looked in to...