Abstract: USB bus is a new computer bus interface standard, and the high-speed feature of USB2.0 is irreplaceable by other bus standards. Aiming at the bulk data transmission requirements between peripherals and PC, this paper designs a bulk data transmission module based on PIC18F4550. The software and hardware design scheme is elaborated in detail, including hardware circuit design, firmware program, driver and application program writing. Experiments show that the communication rate of this module is as high as 8Mb/s, which meets the requirements of full-speed USB2.0. This design has the characteristics of simple circuit and easy integration, and has been successfully applied to a storage test system.
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