Abstract:

A sign controller was designed and implemented based on a C8051F020 andCF card, which had a soundimage synchronization function for scrolling signs at low cost. The system design scheme and several relative key points were introduced. The hardware interface circuit between the C8051F020 and CF card was given, and the hidden sector problems of FAT file system caused by formatting differentcapacity CF cards was solved. By the combination of the fast reading CF card data, dualbuffer and FSM (Finite State Machine), continuous sound playing is steady realized. The running results showed that the system design is reliable and practical.

Key words: CF card; soundimage synchronization; C8051F020; FSM