main.c

Button Debounce Example Application main file. More...

Macros
#define	DEBOUNCE_TIME_IN_MS   (50U)
#define	DEBOUNCE_INPUT_SAMPLING_FREQ   (60U)
#define	TIMER0_PRESCALER   (9UL)
#define	TIMER0_CLOCK   (SystemCoreClock >> TIMER0_PRESCALER)
#define	MS_TO_TIMER0_TICKS(ms)   ((1000000UL * ms) / (TIMER0_CLOCK))
#define	MAX_BUTTONS   (8U)

Functions
void	TIMER0_IRQHandler (void)
	Interrupt handler function for the Timer 0 peripheral.
static void	timer0_init (void)
	Function for initializing Timer 0.
int	main (void)
	Function for application main entry.

Variables
static uint_fast16_t	timer0_cc0_period
static deb_t	button [MAX_BUTTONS]

Detailed Description

This file contains the source code for a sample application using button debouncing.

Use board setup A for this example.

Macro Definition Documentation

#define DEBOUNCE_TIME_IN_MS   (50U)

Debounce timer in milliseconds

#define DEBOUNCE_INPUT_SAMPLING_FREQ   (60U)

Input sampling frequency in Hertz

#define TIMER0_PRESCALER   (9UL)

Timer 0 prescaler

#define TIMER0_CLOCK   (SystemCoreClock >> TIMER0_PRESCALER)

Timer clock frequency

#define MS_TO_TIMER0_TICKS

(

ms

)

((1000000UL * ms) / (TIMER0_CLOCK))

Converts milliseconds to timer ticks

#define MAX_BUTTONS   (8U)

Maximum number of buttons in use

Variable Documentation

uint_fast16_t timer0_cc0_period

static

Period between debouncer input reads.

deb_t button[MAX_BUTTONS]

static

Debounced button state holder