Usually we get the book that teach us using assemble language to program microcontroller. How can I get the information about using C language to controll it? Thanks
Do you already know 'C'? Do you already know the 8051? If 'Yes' to both, then review the "Getting Started with uVision2" manual (GS51.pdf) and the C51 "User's Guide" (C51.pdf) - particularly the sections which deal with Keil's language extensions.