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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。
With the rapid development of LED display technology, LED display as a new media, applications continue to expand. The corresponding controller came into being. In order to solve our company’s original product with a small load range, discrete components, expensive devices, the difficulty of development and other issues, this paper presents a new LED display program, the program uses ARMCortex-M3 core, the use of embedded development technology, development The low cost, high display, multi-function display asynchronous control card. Including the core of the hardware circuit and DMA controller works, part of the system software flow chart, RS485 and RS232 adaptive communication circuit and automatic baud rate.