You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
46 lines
741 B
46 lines
741 B
/** @file ticker.h
|
|
@author M. P. Hayes, UCECE
|
|
@date 2 April 2007
|
|
@brief
|
|
*/
|
|
#ifndef TICKER_H
|
|
#define TICKER_H
|
|
|
|
#include "system.h"
|
|
|
|
typedef struct
|
|
{
|
|
uint16_t period;
|
|
uint16_t clock;
|
|
} ticker_t;
|
|
|
|
|
|
typedef struct
|
|
{
|
|
uint16_t period;
|
|
uint16_t clock;
|
|
} ticker16_t;
|
|
|
|
|
|
typedef struct
|
|
{
|
|
uint8_t period;
|
|
uint8_t clock;
|
|
} ticker8_t;
|
|
|
|
|
|
#define TICKER_INIT(DEV, PERIOD) \
|
|
(DEV)->period = (PERIOD); \
|
|
(DEV)->clock = (DEV)->period;
|
|
|
|
|
|
/* Return non-zero when the ticker rolls over otherwise return 0. */
|
|
#define TICKER_UPDATE(DEV) \
|
|
(--(DEV)->clock ? 0 : ((DEV)->clock = (DEV)->period))
|
|
|
|
|
|
#define TICKER_START(DEV) \
|
|
(DEV)->clock = (DEV)->period;
|
|
|
|
#endif
|