Research Of Motion Control Card Base On PCI Bus

With the progress of motion control technology, it has been widely used in many industrial automation products in recent years, and forms a remarkable market. Now, motion control cards with DSP as the core are becoming the main trend of motion control. They can easily be plugged-in PC to combine the information processing capabilities of PC with the motion control capabilities of motion control cards, which have the advantages of powerful information processing capability, strong motion control ability and good openness. Interpolation is the most basic and always used function, but, all of motion control card have the interpolation function by software, which expend much resource of processor. And, there are some unusual demands in some application. Such as electric spark dressing, inverse interpolation with quick response and good real-time is needed.By analyzing the structure and functions of several typical motion control cards, a motion control card using DSP and PCI interface is developed. The hardware frame of our motion control card is designed.32-bit fixed-point DSP TMS320F2812 is used as the controlling core, and PCI bus interface is realized by using PCI9052,a CPLD is used as logic circuit. The design method of the functional modules of the control card are discussed in detail, such as the minimum system of DSP,the interface of DSP and PC,the digital I/O circuit and the analog export circuit.At the same time, utilize the convenient of PC communication with person sufficiently. Have developed an easy used interpolation programming. Developed an unitized data format, which make it easy to improve the user program. Researched the method of driver development carefully, use the Windriver to debug the PCI card. The program of DSP including the initialization,the communications with PC and the test of functional modules of the card is designed by modular programming methods.