Help me now i must write program control washing machine use RTX ,can give me some hints?
"this app (virtually sll '51 apps) will do better without a RTOS."
Actually, we don't know (yet) that it is an 8051 app...
Even so, it is still highly unlikely that this application will need an RTOS!
(the homework assignment might require that he use RTX - but the application itself almost certainly doesn't require it)