基于PXA270处理器串口通信的研究

Research of Serial Communication Based on PXA270 Processor

以PC机作为上位机,以PXA270处理器作为下位机,利用RS232串口来完成信息交换。采用MAX3243实现TTL逻辑电平和RS 232电平之间的相互转换,下位机使用C++语言制作串口通信软件,借助DNW工具进行结果测试,实现了可视化,操作简便,确保了人机交互的准确、可靠。

This paper,taking the PC as an upper computer,the PXA270 processor as a lower computer,uses RS232 serial port to com- plete the exchange of information. Using MAX3243 it achieves the mutual conversion between TTL logic level and RS 232 level. PC uses C ＋ ＋ to make the serial communication interface, uses DNW tool to test results, visualization and easy operation, so to ensure the accu- racy and reliability of human - computer interaction.