diagram T8 Tube

 Figure 5 main microprocessor control program chart

MR16

2.3 CPLD programming block diagram

The CPLD programming for modular programming. Entire program by the data generation module , the address decoding module , the shift clock generator module , line scans module column drivers Storage modules and other components . Program structure shown in Figure 6 .

Figure 6 CPLD modular design diagram T8 Tube 

3 Conclusion

This design uses a microcontroller 89C51 , combined with CPLD simplify the system structure, reducing the control panel area , reducing system power consumption and interference and improve system stability, and has distributed flexible and scalable and easy to make commissioning and maintenance become more convenient. CPLD programmable with online functionality through software to reconfigure the CPLD can be achieved on different specifications of the control , the system has the versatility and scalability.

LED Flexi

Abstract : LED display design generally use single-chip control , the article describes the application of programmable devices display some of the hardware scan control to achieve a method , which can handle the software with the hardware scan separated , making the software design more convenient and flexible.