Rotary encoder

Utility functions to decode signals from a 2-bit rotary encoder. More...

Data Structures
struct	rotenc
	Rotary encoder click counts and state tracking. More...

Macros
#define	ROTENC_VAR_INIT   { 0 }
	Static initializer for a rotary encoder. More...

Typedefs
typedef struct rotenc	rotenc_t
	Rotary encoder click counts and state tracking. More...

Functions
void	rotenc_decode (rotenc_t *r, uint8_t state)
	Handle a state update. More...
uint16_t	rotenc_count14 (rotenc_t *r)
	Read a 14-bit count of the current knob position. More...

Detailed Description

Utility functions to decode signals from a 2-bit rotary encoder.

Macro Definition Documentation

#define ROTENC_VAR_INIT   { 0 }

Static initializer for a rotary encoder.

Definition at line 39 of file rotenc.h.

Typedef Documentation

typedef struct rotenc rotenc_t

Rotary encoder click counts and state tracking.

Function Documentation

uint16_t rotenc_count14

(

rotenc_t *

r

)

Read a 14-bit count of the current knob position.

Suitable for higher resolution devices.

Definition at line 45 of file rotenc.c.

void rotenc_decode	(	rotenc_t *	r,
		uint8_t	state
	)

Handle a state update.

It is safe to call this function when there has not actually been a change of state, this allows it to be used as a polling function.

No external debounce is required.

Definition at line 16 of file rotenc.c.