关键词: 智能控制器, Cortex-M4, 隔离电源, 模块化设计, 触摸屏

Abstract: This topic designs an intelligent controller based on Cortex-M4, including 6 channels DI, 6 channels DO, 2 channels pulse output, 4 channels A/D, 2 channels D/A, 1 channel RS232 communication, 1 channel RS485 communication, 1 channel Ethernet communication and 1 4.3-inch display touch screen. The main chip adopts STM32F429ZGT6 processor. The A/D circuit is a 12-bit resolution conversion circuit based on MCP3204, and the analog voltage is collected. D/A circuit is a conversion circuit based on voltage and current conversion chip XTR111, with output current of 4-20 mA and resolution of 0.05%.The isolated power supply system is composed of isolated power supply module.4.3-inch display touch screen for man-machine interaction. Modular design facilitates hardware expansion and tailoring. With a memory capacity of 33M bytes, you can embed real-time operating systems, intelligent control algorithms, and graphical interfaces. This controller realizes the temperature control of the warm box, over shoot<1.3℃,steady-state error<0.1℃.

Key words: intelligent controller, Cortex-M4, isolated power, modular design, touch screen