hw_iface.h

#ifndef HW_IFACE_H
#define HW_IFACE_H

struct I2CDriver {
  void *state;
  int (*reset)(struct I2CDriver *self);
  int (*write)(struct I2CDriver *self,
               unsigned short device_addr,
               unsigned char *data,
               unsigned int length);
  int (*read)(struct I2CDriver *self,
              unsigned short device_addr,
              unsigned char *buff,
              unsigned int length);
};

struct PWMOutputDriver {
  void *state;
  int (*reset)(struct PWMOutputDriver *self);
  int (*write)(struct PWMOutputDriver *self, unsigned int channel, unsigned long pulse_width_us);
};

struct PWMInputDriver {
  void *state;
  int (*reset)(struct PWMInputDriver *self);
  int (*read)(struct PWMInputDriver *self, unsigned int channel, unsigned long *pulse_width_us);
};

struct UARTDriver {
  void *state;
  int (*reset)(struct UARTDriver *self);
  int (*write)(struct UARTDriver *self, unsigned char c);
  int (*read)(struct UARTDriver *self, unsigned char *c);
};

struct TimerDriver {
  void *state;
  int (*reset)(struct TimerDriver *self);
  int (*restart)(struct TimerDriver *self);
  int (*read)(struct TimerDriver *self, unsigned long long *us);
};

struct LEDDriver {
  void *state;
  int (*reset)(struct LEDDriver *self);
  int (*turn_on)(struct LEDDriver *self);
  int (*turn_off)(struct LEDDriver *self);
};

struct SystemDriver {
  void *state;
  int (*reset)(struct SystemDriver *self);
  int (*sleep)(struct SystemDriver *self, unsigned long us);
};

#endif