 This file provides joystick operations.

#include <stdint.h>
#include <avr/io.h>
#include <avr/pgmspace.h>

Macros
Port definition for reading the joystick input.
#define	KEY_PORT PINF

#define	KEY_PUR PORTF

#define	KEY_DDR DDRF

#define	KEY_PIN PINF1

Port defininition for the joystick Enter button.
#define	ENTER_PORT PINE

#define	ENTER_PUR PORTE

#define	ENTER_DDR DDRE

#define	ENTER_PIN PINE2

Valid Key States.
#define	KEY_STATE_UP 0x01

#define	KEY_STATE_DOWN 0x02

#define	KEY_STATE_LEFT 0x04

#define	KEY_STATE_RIGHT 0x08

#define	KEY_STATE_ENTER 0x10

#define	KEY_STATE_NO_KEY 0x00

#define	KEY_STATE_DONE 0x20

Functions
void	key_init (void)
	This will intialize the joystick and the ADC for button readings.

void	key_deinit (void)
	This will disable the ADC used for button readings.

key_state_t	key_task (void)
	This will check the joystick state to return the current button status. More...

key_state_t	key_state_get (void)
	This function will start the ADC conversion and read the current converstion value to determine the button position. More...

uint8_t	is_button (void)
	This will poll run key_task() to determine if a button has been pressed. More...

uint8_t	get_button (void)
	This function will wait for a user to press a button. More...

Detailed Description

 This file provides joystick operations.

Combined with ADC functions.

Definition in file key.h.

Macros