外文翻譯--基于at89c51單片機的led顯示控制系統-單片機-資料下載頁

【導讀】本次設計完成基于AT89C52單片機的LED顯示控制系統軟硬件的設計。們用一個簡單的外部電路控制尺寸為32*192的顯示屏，通過一個動態顯示模塊，我們能通過修改程序來改變顯示內容。功能且滾動速度可以根據要求調節，屏幕也具有暫停功能。存儲器中，儲存器的容量可以根據顯示漢字的需要擴展。該顯示屏具有低電壓，改善和美化人們的生活環境。LED燈可以應用于大型購物商場、車站、碼頭、地。LED產業已成為一個快速增長的新興產業，具有巨。一些元器件的顯示裝置的模構通常是由顯示模塊、控制系。顯示模塊構成的網格結構由領導，并負責發光顯示；屏幕上可以。LED點陣顯示可分為圖形顯示，圖像顯示和視頻顯示器顯示。驅動電路、行線驅動電路和6個32×32LED點陣。顯示單位由兩個74HC154. AT89C52共同來控制數據輸入。顯示一個字符需要兩個74HC154列掃描信。此外，因為漢字每一個顯示需要128字節的存儲空間，但AT89C52單片。整個軟件設計的主要構成由顯示程序和通訊程序。第二列數據讀取程序延遲后結束了，下一個行是

　　

【正文】 ports. In order to realized to PC reliable munication with SCM, and ensure that both sides have the same data format and baud rate, this design uses RS232 munications, a 10 bits data format, 9600bit / s baud rate. Software program posed of the beginning, initialization, display program, front, which the main Character code stored in the static memory 6264, and the SCM will wait for signal is given, that is, the input signal of SCM pin . When is from low to high, display program begin to be run. First, control words written to 8255A control port, 8255A work in the form of mode 0 in the design. After control word was finished, the data will be displayed which is transferred to the 8255A from the 6264, the display data is output for four times because the line width of the characters screen is 32, a row of data is input and transported from top to bottom each, signal of the first rows which is controlled by SCM is gated after data transmission is over, so the first column data is displayed, then call delay procedures to display the contents of the stable. the next column of data is read after delay procedures is over, and the next row is gated, so that the second column of data is also displayed, and so on, because the 10 screen size is 32 192, 192 rows are shown, and 192 rows constitute an image. Then, scanning begin from the first column, and the starting address of display data backward shift on the basis of the original, which has an address overflow issues, it will assign start address to the address pointer when the data address is overflow, the display data content will be constantly repeated. Flow chart of munication with PC and SCM is shown in Figure 10. Realtime munication parts which municate with PC receive data information by SCM serial disruption, so realtime data information transmission with PC was implemented. CONCLUSION LED display system that was designed adopted the host puter and slave structure, the host puter is PC, and municated with slave puter display system through the serial munication interface, which can implement string modification, display mode settings, time settings and other functions。 The slave mainly implement display of LED dot matrix display screen This was controlled by SCM. Chinese character display is 32 32 dot matrix model, and to achieve realtime screen display changes, and have to display the current time and date functions. The design of LED dot matrix display control system has a simple circuit, stability, low power consumption, long life, easy to display characteristics, and include the LED display basic principles and procedures. As long as the microcontroller I/O interface is expanded, and increase the number of LED dot matrix and related chips, you can design a larger area and more tricks of the LED display. This article has some reference value of theory and practice. As the core control unit of the system, that is AT89C52, has lower frequency, in the future, in order to achieve LED video display in real time, and the display image can be pressed, which will increase the burden on the system. We can take advantage of highspeed DSP as the core control unit, and solve the above mentioned problems.