Linux系统中Usb转串口的使用方法(Ubuntu 10.10)

首先,安装minicom:sudo apt-get install minicom
在安装好minicom之后对minicom进行配置,在此,需要注意的一点是在Linux环境下不许要装Usb转串口的驱动,在此,使用lsmod命令
                        z75993971@Ubuntu:~$ lsmod
                        Module                  Size  Used by
                        pl2303                 13696  0
                        usbserial              39507  1 pl2303
                        binfmt_misc             7984  1
可见,linux可以自动识别2303设备
之后在终端中输入dmesg | grep usb命令
                       z75993971@ubuntu:~$ dmesg | grep usb
                       [    0.497563] usbcore: registered new interface driver usbfs
                       [    0.497574] usbcore: registered new interface driver hub
                       [    0.497601] usbcore: registered new device driver usb
                       [    1.001716] usb 2-3: new high speed USB device using ehci_hcd and address 2
                       [   18.178144] input: USB 2.0 Camera as /devices/pci0000:00/0000:00:1d.7/usb2/2-3/2-3:1.0/input/input5
                       [   18.178198] usbcore: registered new interface driver uvcvideo
                       [   64.090038] usb 6-1: new full speed USB device using uhci_hcd and address 2
                       [   64.328761] usbcore: registered new interface driver usbserial
                       [   64.328807] usbcore: registered new interface driver usbserial_generic
                       [   64.328810] usbserial: USB Serial Driver core
                       [   64.362942] usb 6-1: pl2303 converter now attached to ttyUSB0
                       [   64.362970] usbcore: registered new interface driver pl2303
注意上面加红的地方,他指明了设备号为:ttyUSB0
之后,就可以进行mimicom的配置了

在终端中输入:minicom -s,选择
            +-----[configuration]------+
            | Filenames and paths      |
            | File transfer protocols  |
            | Serial port setup        |
            | Modem and dialing        |
            | Screen and keyboard      |
            | Save setup as dfl        |
            | Save setup as..          |
            | Exit                     |
            | Exit from Minicom        |
            +--------------------------+
配置成如下方式:
    +-----------------------------------------------------------------------+
    | 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?                                              |
    +--------------------------------------------------------------------
完成后退出,退出后进入   Modem and dialing 配置成如下方式:
(原因:我们使用的是串口,而不Modem)
 +--------------------[Modem and dialing parameter setup]---------------------+
 |                                                                            |
 | A - Init string .........                                                  |
 | B - Reset string ........                                                  |
 | C - Dialing prefix #1.... ATDT                                             |
 | D - Dialing suffix #1.... ^M                                               |
 | E - Dialing prefix #2.... ATDP                                             |
 | F - Dialing suffix #2.... ^M                                               |
 | G - Dialing prefix #3.... ATX1DT                                           |
 | H - Dialing suffix #3.... ;X4D^M                                           |
 | I - Connect string ...... CONNECT                                          |
 | J - No connect strings .. NO CARRIER            BUSY                       |
 |                           NO DIALTONE           VOICE                      |
 | K - Hang-up string ......                                                  |
 | L - Dial cancel string .. ^M                                               |
 |                                                                            |
 | M - Dial time ........... 45      Q - Auto bps detect ..... No             |
 | N - Delay before redial . 2       R - Modem has DCD line .. Yes            |
 | O - Number of tries ..... 10      S - Status line shows ... DTE speed      |
 | P - DTR drop time (0=no). 1       T - Multi-line untag .... No             |
 |                                                                            |
 | Change which setting?       (Return or Esc to exit)                        |
 +----------------------------------------------------------------------------+
配置完成后推出,在退出时一定要选择Save setup as dfl 
到此,Minicom的配置完成,连上串口线,打开开发板电源即可看到串口输出的打印信息

===== 三.Minicom的使用 =====

1.minicom的执行
用指令"rpm -qa | grep minicom"来确认是否安装了minicom,回车后会显示minicom 的版本信息.
第一次 启动时:
即输入 minicom提示 错误。则 需: minicom -s
启动
出现配置菜单:选serial port setup
进入串口配置
输入A配置串口驱动为/dev/ttyS0
输入E配置速率为115200 8N1
输入F将 Hardware Flow Control 设 为 NO
回车 退出
由于我们使用minicom作为超级终端控制路由器等设 备, 而不是控制modem, 所以需要修改Modem and dialing, 将Init string, Reset string, Hang-up string设置为空. 设置完成后选择Save setup as dfl将当前设置保存为默认设置.
在配置菜单 选Save setup as df1保存(一定要记得这一步)
选Exit退出

下次在输入minicon 即可直接进入。
命令minicom是进入串口超级终端画面,而minicom -s为配置minicom
说明/dev/ttyS0 对应为串口0 为你连接开发板的端口。

注意:非正常关闭minicom,会在/var/lock下创建几个文件LCK*,这几个文件阻止了minicom的运行,将它们删除后即可恢复

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