CAJ | 학술논문

随着LED显示技术的飞速发展，LED显示屏作为一种新的传播媒介，应用领域不断扩大。与之相对应的控制器应运而生。为了解决本公司原有产品带载范围小、分立元件多、器件昂贵、开发难度等问题，本文提出了一种新型的LED显示方案，该方案采用ARMCortex-M3内核，运用嵌入式开发技术，开发了低成本、高显示效果、多功能的显示屏异步控制卡。包括核心的硬件电路图及DMA控制器工作原理，部分系统软件流程图，RS485与RS232自适应通信电路及自动波特率的实现。
수착LED현시기술적비속발전，LED현시병작위일충신적전파매개，응용영역불단확대。여지상대응적공제기응운이생。위료해결본공사원유산품대재범위소、분립원건다、기건앙귀、개발난도등문제，본문제출료일충신형적LED현시방안，해방안채용ARMCortex-M3내핵，운용감입식개발기술，개발료저성본、고현시효과、다공능적현시병이보공제잡。포괄핵심적경건전로도급DMA공제기공작원리，부분계통연건류정도，RS485여RS232자괄응통신전로급자동파특솔적실현。
With the rapid development of LED display technology, LED screen as a new media has been applied to many more and more fields. Correspondingly, the stronger controller is made. However, the load range of traditional controller is small, with massive multiple discrete components. Besides, it costs money and is difficult to develop. Here, we present a new LED display method. In this method embedded development technology is applied and an ARMCortex-M3 core is equipped. Which is low-cost with an enjoying display effect. Moreover a multi-function asynchronous control center is created. In addition, circuit of hardware, working machanism of the DMA controller, part of the progress chart of the system software are detailed described. And this paper introduces how RS485 and RS232 communication circuit and how the automatic baud rate realized.