Abstract: DSP with a high speed of digital signal processing offers a good design platform performance for motion control motors and other applications.Usually the LCD screen is used to show various control parameten of the output for a complete control program, but the traditional slow equipment has conflict with the high-speed DSP processing power and real-time control requirements. The article describes a display buffer which uses a complex programmable logic device CPLD to design, it can solve the contradiction bettween high-speed competing power of the DSP chip and lower-speed displaying of LCD liquid crystal display module. As for the same character, using the buffer to control the LCD display can save at least 9ms than using the DSP directly, so it can reduce the wait time of DSP on LCD, improve the officiency of the DSP and optimize the system.
Keywords:CPLD;LCD;display drive buffer;DSP
