Linux uses USB to serial port to debug ARM development board

The USB to serial port uses the PL2303 chip, and Linux 2.4 and above versions already have built-in drivers.

1. Install minicom

In Ubuntu, use sudo apt-get install minicom to install it

2. Configure minicom

   # minicom -s
   Serial port setup [Enter]
    +-------------------------------------------------------------+
    | A -    Serial Device      : /dev/ttyUSB0                    |
    | B - Lockfile Location     : /var/lock                       |
    | C -   Callin Program      :                                 |
    | D - Callout Program      -:                                 |
    | E -    Bps/Par/Bits       : 115200 8N1                      |
    | F - Hardware Flow Control : No                              |
    | G - Software Flow Control : No                              |
    |                                                             |
    |    Change which setting?                                    |
    +-------------------------------------------------------------+
注: 如果没有使用USB转接口，Serial Device要配置为/dev/ttyS0

   Save setup as dfl
   Exit from Minicom

When using USB to serial port, please note:
First, you need to load the USB-serial conversion line driver: modprobe pl2303

Check the status: dmesg | grep pl2303

[ 2788.401258] usb 6-1: FTDI USB Serial Device converter now attached to ttyUSB0
[ 6664.718291] usbcore: registered new interface driver pl2303

3. Use minicom to transfer files
--------------------------------------------------
# minicom
(Ctrl + a) --> s --> zmodem --> [Okay] --> 
    
    +-----------------------------------------+ 
    |No file selected - enter filename: | 
    |> /home/zxl/ssl/codes/led/lls_led.ko | [Enter]
    +-----------------------------------------+