sd_button.h

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#ifndef __SD_BUTTON_H
#define __SD_BUTTON_H
#ifdef __cplusplus
extern "C" {
#endif

extern struct sd_button reset_button;
extern struct sd_button select_button;
enum sd_button_err {
    SD_BUTTON_SUCCESS,      
    SD_BUTTON_ERROR         
};

enum sd_button_state {
    SD_BUTTON_IDLE,         
    SD_BUTTON_DOWN_WAIT,        
    SD_BUTTON_DOWN_DEB,     
    SD_BUTTON_UP_WAIT,      
};

struct sd_button {
    GPIO_TypeDef        *port;          
    uint16_t        pin;            
    enum sd_button_state    state;          
    uint32_t        tick;           
    uint32_t        up_to;          
    uint32_t        down_to;        
    void            (*down_cb)(void);   
    void            (*up_cb)(void);     
};
enum sd_button_err sd_button_init   (struct sd_button *butt,
                        GPIO_TypeDef *port,
                        uint16_t pin,
                        uint32_t up_to,
                        void (*up_cb)(void),
                        uint32_t down_to,
                        void (*down_cb)(void));
enum sd_button_err sd_button_run    (struct sd_button *butt);
#ifdef __cplusplus
}
#endif
#else
#error "Multiple inclusion of sd_button.h"
#endif /* __SD_BUTTON_H */

/*
 * END OF FILE [sd_button.h]
 */