Use a PIC for automatic baud-rate detection

摘要

Automatic baud-rate detection is desir-able in many applications. Mi-crochip's (www.microchip.com) stan-dard USART module that the company embeds in most of its PIC microcontrollers lends itself to a simple and easily implemented automatic baud-detection scheme. The PIC18FXX2 data sheet defines the following baud rate in bits per second: X= F_(OSC)/16xB-1; B= F_(OSC)/16(X+1) (1) where X is the value for the baud-rate generator and F_(OSC) is the input clock frequency.