Fpga-based Electronic Hard Disk Controller Design

The Electronical hardisk adopts non-volatility Flash memory to hold data. As the traditional hardisk system, the electronical hardisk communicates with host system on ATA (Advanced Technology Attachment) protocal, its alternative name is IDE interface protocal. Hardisk controller chip charges the whole works of hardisk. It makes a master-slave pair with IDE AT A/AT API master controller on mainbord of host sytem. ATA protocal describe the principle of hardisk's working, consists of instructions set, interface way and states' transition of host-device master-slave couple. Hardisk controller chip was designed based on Altera's Nios ii opencore IP. A Flash control unit is in charge of the operation of Flash memories. It was like the IDE interface module. Both of them are drew, modified as well as realized in Quartus II FPGA development enviomment. That just is the feature of the whole design.