However, it can't be easily be used from the file system like sysfs, so the examples here will use sysfs, which is still going to be supported for some time. The new API addresses a number of issues with the sysfs interface. GPIO devices appear as part of sysfs.īefore we continue, I should mention that this interface is being deprecated in favor of a new GPIO character device API.
#LIVESCRIBE DESKTOP EXPORT DOES NOTHING DRIVERS#
Sysfs is a pseudo filesystem provided by the Linux kernel that makes information about various kernel subsystems, hardware devices, and device drivers available in user space through virtual files.
For simple applications you can use it this way, either interactively or by putting the commands in shell scripts. BackgroundĪs we'll see in future installments of this blog series, there are different ways to access GPIO hardware from programs, but sysfs is a simple one that is supported by the Linux kernel and makes the devices visible in the file system so we can experiment from the command line without needing to write any code. I'll show some examples that will work on the Raspberry Pi platform. We won't need to do any programming as we can do this from shell commands. In this blog post we'll look at basic GPIO control using the sysfs interface provided by the Linux kernel.
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