84 lines
2.9 KiB
C++
84 lines
2.9 KiB
C++
#ifndef LINUX_GPIO_GPIODEFINITIONS_H_
|
|
#define LINUX_GPIO_GPIODEFINITIONS_H_
|
|
|
|
#include <string>
|
|
#include <unordered_map>
|
|
|
|
using gpioId_t = uint16_t;
|
|
|
|
namespace gpio {
|
|
|
|
enum Levels { LOW = 0, HIGH = 1 };
|
|
|
|
enum Direction { IN = 0, OUT = 1 };
|
|
|
|
enum GpioOperation { READ, WRITE };
|
|
|
|
enum GpioTypes { NONE, GPIOD_REGULAR, CALLBACK };
|
|
|
|
static constexpr gpioId_t NO_GPIO = -1;
|
|
} // namespace gpio
|
|
|
|
/**
|
|
* @brief Struct containing information about the GPIO to use. This is
|
|
* required by the libgpiod to access and drive a GPIO.
|
|
* @param chipname String of the chipname specifying the group which contains the GPIO to
|
|
* access. E.g. gpiochip0. To detect names of GPIO groups run gpiodetect on
|
|
* the linux command line.
|
|
* @param lineNum The offset of the GPIO within the GPIO group.
|
|
* @param consumer Name of the consumer. Simply a description of the GPIO configuration.
|
|
* @param direction Specifies whether the GPIO should be used as in- or output.
|
|
* @param initValue Defines the initial state of the GPIO when configured as output.
|
|
* Only required for output GPIOs.
|
|
* @param lineHandle The handle returned by gpiod_chip_get_line will be later written to this
|
|
* pointer.
|
|
*/
|
|
class GpioBase {
|
|
public:
|
|
GpioBase() = default;
|
|
|
|
GpioBase(gpio::GpioTypes gpioType, std::string consumer, gpio::Direction direction, int initValue)
|
|
: gpioType(gpioType), consumer(consumer), direction(direction), initValue(initValue) {}
|
|
|
|
virtual ~GpioBase(){};
|
|
|
|
/* Can be used to cast GpioBase to a concrete child implementation */
|
|
gpio::GpioTypes gpioType = gpio::GpioTypes::NONE;
|
|
std::string consumer;
|
|
gpio::Direction direction = gpio::Direction::IN;
|
|
int initValue = 0;
|
|
};
|
|
|
|
class GpiodRegular : public GpioBase {
|
|
public:
|
|
GpiodRegular()
|
|
: GpioBase(gpio::GpioTypes::GPIOD_REGULAR, std::string(), gpio::Direction::IN, 0){};
|
|
|
|
GpiodRegular(std::string chipname_, int lineNum_, std::string consumer_,
|
|
gpio::Direction direction_, int initValue_)
|
|
: GpioBase(gpio::GpioTypes::GPIOD_REGULAR, consumer_, direction_, initValue_),
|
|
chipname(chipname_),
|
|
lineNum(lineNum_) {}
|
|
std::string chipname;
|
|
int lineNum = 0;
|
|
struct gpiod_line* lineHandle = nullptr;
|
|
};
|
|
|
|
class GpioCallback : public GpioBase {
|
|
public:
|
|
GpioCallback(std::string consumer, gpio::Direction direction_, int initValue_,
|
|
void (*callback)(gpioId_t gpioId, gpio::GpioOperation gpioOp, int value, void* args),
|
|
void* callbackArgs)
|
|
: GpioBase(gpio::GpioTypes::CALLBACK, consumer, direction_, initValue_),
|
|
callback(callback),
|
|
callbackArgs(callbackArgs) {}
|
|
|
|
void (*callback)(gpioId_t gpioId, gpio::GpioOperation gpioOp, int value, void* args) = nullptr;
|
|
void* callbackArgs = nullptr;
|
|
};
|
|
|
|
using GpioMap = std::unordered_map<gpioId_t, GpioBase*>;
|
|
using GpioMapIter = GpioMap::iterator;
|
|
|
|
#endif /* LINUX_GPIO_GPIODEFINITIONS_H_ */
|