写入/sys/class/gpio/export失败 [英] writing to /sys/class/gpio/export failing

问题描述

我正在做一个项目，需要我配置gpio引脚并将传感器添加到原子板.内核已配置了gpio ... CONFIG_GPIO_SYSFS=y是内核选项之一.

I am working on a project which needs me to configure the gpio pins and add sensors to atom board. The kernel has configured the gpio ... CONFIG_GPIO_SYSFS=y is one of the kernel options.

我正在使用 fedora 2.6.29-10
但是我无法使用以下方式写出gpio文件夹中的导出文件

I am using fedora version 2.6.29-10
But i am not able to write to export file in gpio folder using

GPIO=22  // to add pin 22 to userspace  
echo $GPIO > /sys/class/gpio/export

我得到了错误
bash: echo: write error: Invalid argument

I get the error
bash: echo: write error: Invalid argument

我也尝试过使用sudo和sh -c进行相同操作，但是没有用，除非我可以将这些引脚暴露给用户空间，否则我无法编写任何代码.我在做什么错? 内核版本或其他一些内核选项是否需要设置?

I also tried the same with sudo and sh -c but no use ,unless i can expose these pins to userspace i cant write any code.What am i doing wrong?
Is the problem with the kernel version or some other kernel options needs to set??

预先感谢

推荐答案

好，如我所描述的，使用GPIO引脚.您需要使用 insmod 或 modprobe 加载模块. 经过漫长的等待，我从原子板制造商那里获得了这些模块. 现在已经解决了上述问题.

Well , for the GPIO pins to be used as I have described. you need to load a module using insmod or modprobe. After a long wait i got those modules from the manufacturers of our atom board. The problem described above is now solved.

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