Ledkey. DLL, DPJ. DLL two simulation experiment board, The use of simulation experiment board: the DPJ. DLL and ledkey DLL copied to Keil software installation folder c51 \ bin folder of the installation is successful. Such as user Keil software installed in C disk, then you should put LedKey. DLL file copy to the C: \ Keil \ C51 \ Bin folder.

Dpj.dll
ledkey.dll

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