erms, it still don’t work.. im using port 1 for PB0~PB7, P0.2 for EN, P0.1 for R/W, P0.0 for RS.. what does your b define as? is it PB0~PB7? im using this lcd, with datasheet inside.. http://singapore.rs-online.com/web/p/lcd-displays-alphanumeric/2143288/?searchTerm=214+3288&relevancy-data=636F3D3126696E3D4931384E525353746F636B4E756D6265724D504E266C753D656E266D6D3D6D61746368616C6C26706D3D5E5C647B337D5B5C732D2F255C2E5D5C647B332C347D2426706F3D313426736E3D592673743D52535F53544F434B5F4E554D424552267573743D32313420333238382677633D4E4F4E4526
guess i need to add #include < c8051f340.h> as header for sure because im using silicon lab. (: