LED dot matrix display screen while developing rapidly, but still exists in the practical application of single function, change the display information of trouble, flexibility and mobility is poor, poor controllability of many shortcomings.Because of its control system are developed based on embedded microcontroller processor, so SCM also occupies a place in it.But, due to the LED display control is relatively complex, especially for show special effects, such as the circular movement, covering the neon effect, request processor operation speed, high efficiency, no shake, flicker, the phenomenon such as ghosts.As a result, the design of LED display should not only consider the hardware factors, should also consider to display the data organization, through the combined method of software and hardware can control circuit designed a high cost performance.So how in the case of cost as low as possible, the requirements to function, clear, steady, according to how to reasonable selection, the use of single-chip computer hardware to design a good effect of LED electronic display is this topic research direction.
This topic will be for normal users in the process of using single function, change the display information of trouble mobility, flexibility is poor, poor controllability disadvantages, some research and design a new type of LED dot matrix display module.Multiple unit board can be realized through the interface circuit between cascade, thus form a large display system, convenient to use in various occasions.By adopting the combination of single chip microcomputer and CPLD control way, greatly enhance the controllability of system, equipped with PC software, can by PC wireless remote update the display content.With the display content change, pattern selection (including static, timing change screen, move around, scroll up and down).
Keywords: LED dot matrix, Display, Single chip microcomputer, Remote update
