Raspberry无法访问/dev/mem [英] Raspberry can't access /dev/mem

问题描述

我已在Raspberry上安装Raspbian并添加到其中:

I have installed Raspbian on my Raspberry and added in:

1. /etc/rc.local:

1. /etc/rc.local:

 chown /dev/ttyUSB0 #to allow current user to use 3G modem

/etc/sudoers:

/etc/sudoers:

 raspbian ALL=NOPASSWD: ALL

对于自动登录:

And for autologin:

 1:2345:respawn:/sbin/getty --autologin raspbian --noclear 38400 tty1

在我可以使用Python中的GPIO写入GPIO引脚之前.

Before I can use GPIO from Python to write to GPIO pins.

现在，当我尝试使用sudo运行我的Python脚本时，我收到一个异常，提示我无法访问/dev/mem

Now when I try to run with sudo my Python script I receive an exception where is write that I can't access /dev/mem

我试图将"raspbian"用户添加到"kmem"组中，但不起作用.

I tried to add "raspbian" user to group "kmem" but don't works.

我尝试删除没有密码的自动登录和sudo，但也无法正常工作.

I tried to remove autologin and sudo without password, but also don't works.

我尝试使用C语言的WiringPi和WiringPi的作品.

I tried with WiringPi from C, and with WiringPi works.

请帮助我找到从python使用GPIO的解决方案.

Please help me to find a solution to use GPIO from python.

推荐答案

我发现了问题.

我忘了:

  GPIO.setup(<PIN>, <MODE>)

如果没有此Python抛出异常，则写入时尝试使用root运行代码.

And without this Python throws and exception where write to try to run code with root.

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