[zz]使用树莓派上的串口

sky-Hawk where

Using the serial port on the RaspberryPi
使用树莓派上的串口
http://elinux.org/Using_the_serial_port_on_the_RaspberryPi

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there are several minor things in the way if you want to have dedicated control of the serial port on a raspberry pi

如果你想使用树莓派P1上的串口的话，你得像下述的那样干：

the first is kernel boot messages at startup, those are caused by the kernel parameter console=ttyAMA0,115200 set in /boot/cmdline.txt

kernel debuging is also on the serial port and i dont know what effect it may have on the end-use, so you may want to turn that off also in cmdline.txt, just remove kgdboc=ttyAMA0,115200
首先在/boot/cmdline.txt 移除内核启动信息输出和内核调试信息输出

1. $sudo nano /boot/cmdline.txt

复制代码

去掉console=ttyAMA0,115200  和 kgdboc=ttyAMA0,115200  ，然后存盘。

next is the login prompt, set in /etc/inittab with the line T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100

然后禁止掉从串口登录的功能，

1. $sudo nano /etc/inittab

复制代码

去掉 T0:23:respawn:/sbin/getty -L ttyAMA0 115200 vt100 ，存盘。

once all of those are off, you can use /dev/ttyAMA0 like any normal linux serial port, and you wont get any unwanted traffic confusing the attached devices

现在你可以像使用一个普通串口那样使用/dev/ttyAMA0了

sky-Hawk where

不错,学一个,也许能用上