eive-obsw/linux/gpio/gpioDefinitions.h
2021-02-22 17:36:44 +01:00

50 lines
1.8 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 Direction {
IN = 0,
OUT = 1
};
}
/**
* @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.
*/
typedef struct GpioConfig {
GpioConfig(): chipname(), lineNum(0), consumer(), direction(gpio::Direction::OUT),
initValue(0) {};
GpioConfig(std::string chipname_, int lineNum_, std::string consumer_,
gpio::Direction direction_, int initValue_):
chipname(chipname_), lineNum(lineNum_), consumer(consumer_),
direction(direction_), initValue(initValue_) {}
std::string chipname;
int lineNum;
std::string consumer;
gpio::Direction direction;
int initValue;
struct gpiod_line* lineHandle = nullptr;
} GpioConfig_t;
using GpioMap = std::unordered_map<gpioId_t, GpioConfig_t>;
using GpioMapIter = GpioMap::iterator;
#endif /* LINUX_GPIO_GPIODEFINITIONS_H_ */