USB System Development Based On TMS320VC5509A

USB is a new technology of interface. As a result of low cost, high intelligence and high data transmission rate, USB is focused by many engineers who work on interface to PCs. USB is more preferred in the communication between DSP, MCU and PCs. TMS320VC5509A, a DSP chip which is designed by TI gets the chance. It contains a USB module which can communicate directly between DSP and PC without any other interfacing devices.The paper is mainly about the development of USB and DSSS (Direct Sequence Spread Spectrum) module. In the development of USB, one should write the firmware which runs on the DSP and the driver which runs on the PC. A debugging program should also be provided in order to test the driver. TI's CSL (chip support library) is a good tool in developing firmware, and Driver Studio, a driver developing suite, can simplify the complicated driver development. The WDM (Windows Driver Model) is described in details in the paper, too. VHDL is used for the interface logic design of DSSS module, and the program which is compiled by MAX+PLUSII is downloaded into the FPGA at last.