GPIO
Background
We use sysfs GPIO because it is easy to understand and
instructive. It is deprecated and unmaintained in the kernel
though. See this post for much
information about this.
The replacement for sysfs GPIO is libgpiod (source and docs).
Class Description
-
class SysFS_GPIO_Pin
A GPIO pin, as represented in
/sys/class/gpio/gpio25/Encapsulates an exported
sysfsGPIO pin. It does not export the pin itself (by writing to/sys/class/gpio/export); rather, you have to make sure that the pin directory exists, and is configured correctly.Public Functions
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SysFS_GPIO_Pin(const std::string &pindir)
Constructor
- Parameters:
pindir – The
sysfspin directory; e.g./sys/class/gpio/gpio25
-
Direction direction()
Get direction
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bool state()
Get state
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void set_state(bool)
Set state
Note that it does not make sense to set the state of a GPIO pin that is configured as input.
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SysFS_GPIO_Pin(const std::string &pindir)