【摘要】 为了缩小电路体积、降低硬件成本,同时又保证串口稳定可靠通信,采用的一种波特率自适应方法,该方法充分利用STC单片机运行速度快、拥有片内振荡器、片内资源丰富的特点,在串行通信程序中,利用单片机I/O口和定时器,对主机发送的固定字符进行测量、计算,得到合适的波特率常数,从而实现波特率自适应。给出了设计原理、实现方法、误差分析、流程图和部分程序,并通过应用实例验证该方法切实可行。更多还原

【Abstract】 To reduce circuit volume and hardware cost,and at the same time,guarantee the stable and reliable serial port communication,a baud rate adaptive method is proposed. This method makes full use of STC microcontroller′s characteristics of high-speed running,on-chip oscillator,rich on-chip resources. In the serial communication program,the microcontroller′s I/O port and timer are utilized to detect and calculate the fixed character transmitted by host for getting the right baud rate constant, so as to realize the baud rate self-adaption. The design principle and realization method,error analysis,flow chart and part of the program are also given in this paper. The feasibility of the method was verified by a true example.更多还原