How to set the baud rate for Macs in a terminal

问题

Is it possible to set the baud rate for Macs in a terminal? If yes, how to set the baud rate in terminal through the terminal?

I am trying to talk to the Mac using an Arduino (open source microcontroller), an XBee (wireless communicator) to type in the terminal through the serial monitor. The only problem I am having is the baud rate of the serial monitor and terminal are different. I can easily change the baud rate for the serial monitor in the Arduino, but I do not know what the baud rate is for the terminal in Mac.

回答1:

On Mac OS, stty seemingly can only change terminal settings for an ongoing access.

It works to either:

Access the serial interface, e.g. cat /dev/cu.usbserial, the default settings will be used at first. On a different terminal use stty, e.g. stty -f /dev/cu.usbserial 230400 to set the baud rate, the settings of the terminal accessed before will change.
There is a small time window after executing stty, in which the access can be performed with the desired parameters, e.g. stty -f /dev/cu.usbserial 230400 & cat /dev/cu.usbserial executes stty, detaches it and then immediately performs the access to the serial device.
For one line command logging serial port /dev/tty.usbserial-X's output to cat.out and terminating the logging by pressing Ctrl+C, here is the solution: trap 'kill $(jobs -p)' SIGINT ; cat /dev/tty.usbserial-X | tee cat.out & stty -f /dev/tty.usbserial-X 115200. You can type Ctrl+C to terminate logging to cat.out. (edited)

This only seems to work for the /dev/cu.* device files. I don't know the difference from /dev/tty.* files.

回答2:

Minicom is an excellent tool that does exactly what you're asking for. You can get it using apt on ubuntu but should check this Tutorial out for Mac.

Keep the serial reset issue in mind if you plan on sending data to the Arduino. see http://arduino.cc/playground/Main/DisablingAutoResetOnSerialConnection