pigpio/EXAMPLES/C/ROTARY_ENCODER/rotary_encoder.h

26 lines
597 B
C

#ifndef ROTARY_ENCODER_H
#define ROTARY_ENCODER_H
typedef void (*Pi_Renc_CB_t)(int);
struct _Pi_Renc_s;
typedef struct _Pi_Renc_s Pi_Renc_t;
Pi_Renc_t * Pi_Renc(int gpioA, int gpioB, Pi_Renc_CB_t callback);
/*
This function establishes a rotary encoder on gpioA and gpioB.
When the encoder is turned the callback function is called.
A pointer to a private data type is returned. This should be passed
to Pi_Renc_cancel if the rotary encoder is to be cancelled.
*/
void Pi_Renc_cancel(Pi_Renc_t *renc);
/*
This function releases the resources used by the decoder.
*/
#endif