Scheme autodetects baud rate

摘要

The popularity and easy access of RS-232 ports lend them to many communication projects. You can use a port "as is" or as a tiny parallel port when the exchange uses only control lines. Before the asynchronous serial-data transfer between two devices can take place, you must ensure that both devices are configured to the same data format and transmission rate. Usually, the OS utility or application program on the host computer performs this task, which the OS or a combination of switches selects in the peripheral.