Tic Tac Toe application for SAM Xplained Pro with OLED1 Xplained Pro.

#include <asf.h>
#include <stdlib.h>
#include <stdio.h>

Macros
#define	CIRCLE_SIZE (SQUARE_SIZE / 4)

#define	CROSS_SIZE (SQUARE_SIZE / 3)

#define	NUMBER_OF_SQUARES 9

#define	SQUARE0_X 0

#define	SQUARE0_Y 0

#define	SQUARE1_X (SQUARE0_X + SQUARE_SIZE)

#define	SQUARE1_Y SQUARE0_Y

#define	SQUARE2_X (SQUARE1_X + SQUARE_SIZE)

#define	SQUARE2_Y SQUARE0_Y

#define	SQUARE3_X SQUARE0_X

#define	SQUARE3_Y (SQUARE0_Y + SQUARE_SIZE)

#define	SQUARE4_X SQUARE1_X

#define	SQUARE4_Y SQUARE3_Y

#define	SQUARE5_X SQUARE2_X

#define	SQUARE5_Y SQUARE3_Y

#define	SQUARE6_X SQUARE0_X

#define	SQUARE6_Y (SQUARE3_Y + SQUARE_SIZE)

#define	SQUARE7_X SQUARE1_X

#define	SQUARE7_Y SQUARE6_Y

#define	SQUARE8_X SQUARE2_X

#define	SQUARE8_Y SQUARE6_Y

#define	SQUARE_SIZE (LCD_HEIGHT_PIXELS / 3)

#define	STRING_LENGTH 20

#define	STRING_X (SQUARE2_X + SQUARE_SIZE*2)

Enumerations
enum	button { BUTTON_1, BUTTON_2, BUTTON_3, BUTTON_NONE }

enum	player { NONE, USER, COMPUTER }

Functions
static void	draw_circle (uint8_t square_num)
	Draws a circle at selected point. More...

static void	draw_cross (uint8_t square_num)
	Draws a cross in selected square. More...

static enum button	get_button (void)
	Gets button push. More...

static void	highlight_square (uint8_t square_num)
	Highlights a square. More...

static void	init_buttons (void)
	Configures buttons. More...

static void	init_display (void)
	Initializes the display with explanatory text for the buttons. More...

int	main (void)
	Main entry of example application. More...

static void	opponent_turn (void)
	Selects a random, unoccupied square. More...

static void	setup_board (void)
	Draws the Tic-tac-toe board on the display. More...

static void	user_turn (void)
	User turn Waits for the user to push buttons and select a new square. More...

static uint8_t	we_have_a_winner (void)
	Checks for winner. More...

Variables
uint16_t	games = 0

enum player	occupied_squares [3][3]

const uint8_t	square_coord [9][2]

char	win_string [STRING_LENGTH]

uint16_t	wins = 0

#define CIRCLE_SIZE (SQUARE_SIZE / 4)

Referenced by draw_circle(), and init_display().

#define CROSS_SIZE (SQUARE_SIZE / 3)

Referenced by draw_cross().

#define NUMBER_OF_SQUARES 9

#define SQUARE0_X 0

#define SQUARE0_Y 0

Referenced by setup_board().

#define SQUARE1_X (SQUARE0_X + SQUARE_SIZE)

#define SQUARE1_Y SQUARE0_Y

#define SQUARE2_X (SQUARE1_X + SQUARE_SIZE)

#define SQUARE2_Y SQUARE0_Y

#define SQUARE3_X SQUARE0_X

#define SQUARE3_Y (SQUARE0_Y + SQUARE_SIZE)

Referenced by init_display(), main(), and setup_board().

#define SQUARE4_X SQUARE1_X

#define SQUARE4_Y SQUARE3_Y

#define SQUARE5_X SQUARE2_X

#define SQUARE5_Y SQUARE3_Y

#define SQUARE6_X SQUARE0_X

#define SQUARE6_Y (SQUARE3_Y + SQUARE_SIZE)

Referenced by init_display().

#define SQUARE7_X SQUARE1_X

#define SQUARE7_Y SQUARE6_Y

#define SQUARE8_X SQUARE2_X

#define SQUARE8_Y SQUARE6_Y

#define SQUARE_SIZE (LCD_HEIGHT_PIXELS / 3)

Referenced by draw_circle(), draw_cross(), highlight_square(), and setup_board().

#define STRING_LENGTH 20

Referenced by setup_board().

#define STRING_X (SQUARE2_X + SQUARE_SIZE*2)

Referenced by main(), and setup_board().

enum button

Enumerator
BUTTON_1
BUTTON_2
BUTTON_3
BUTTON_NONE

enum player

Enumerator
NONE
USER
COMPUTER

static void draw_circle ( uint8_t square_num )

static

Draws a circle at selected point.

References CIRCLE_SIZE, gfx_mono_draw_circle, GFX_PIXEL_SET, GFX_WHOLE, square_coord, and SQUARE_SIZE.

Referenced by user_turn().

static void draw_cross ( uint8_t square_num )

static

Draws a cross in selected square.

References CROSS_SIZE, gfx_mono_draw_line, GFX_PIXEL_SET, square_coord, and SQUARE_SIZE.

Referenced by opponent_turn().

static enum button get_button ( void )

static

Gets button push.

References BUTTON_1, BUTTON_2, BUTTON_3, BUTTON_NONE, and port_pin_get_input_level().

Referenced by main(), and user_turn().

static void highlight_square ( uint8_t square_num )

static

Highlights a square.

References gfx_mono_draw_rect, GFX_PIXEL_CLR, GFX_PIXEL_SET, square_coord, and SQUARE_SIZE.

Referenced by user_turn().

static void init_buttons ( void )

static

Configures buttons.

References port_config::direction, port_config::input_pull, port_get_config_defaults(), PORT_PIN_DIR_INPUT, PORT_PIN_PULL_UP, and port_pin_set_config().

Referenced by main().

static void init_display ( void )

static

Initializes the display with explanatory text for the buttons.

References CIRCLE_SIZE, gfx_mono_draw_circle, gfx_mono_draw_string(), GFX_PIXEL_SET, GFX_WHOLE, SQUARE3_Y, SQUARE6_Y, and sysfont.

Referenced by main().

int main ( void )

Main entry of example application.

References BUTTON_NONE, delay_init(), delay_ms, games, get_button(), gfx_mono_draw_string(), gfx_mono_init, i, init_buttons(), init_display(), opponent_turn(), setup_board(), SQUARE3_Y, STRING_X, sysfont, system_init(), user_turn(), we_have_a_winner(), and wins.

static void opponent_turn ( void )

static

Selects a random, unoccupied square.

References COMPUTER, draw_cross(), and occupied_squares.

Referenced by main().

static void setup_board ( void )

static

Draws the Tic-tac-toe board on the display.

References games, gfx_mono_draw_filled_rect, gfx_mono_draw_line, gfx_mono_draw_string(), GFX_PIXEL_CLR, GFX_PIXEL_SET, i, j, NONE, occupied_squares, SQUARE0_Y, SQUARE3_Y, SQUARE_SIZE, STRING_LENGTH, STRING_X, sysfont, win_string, and wins.

Referenced by main().

static void user_turn ( void )

static

User turn Waits for the user to push buttons and select a new square.

References BUTTON_1, BUTTON_2, BUTTON_3, BUTTON_NONE, draw_circle(), get_button(), highlight_square(), NONE, occupied_squares, and USER.

Referenced by main().

static uint8_t we_have_a_winner ( void )

static

Checks for winner.

Returns: Enum to say if there is a winner or not.

Return values

NONE	No winner
COMPUTER	Opponent won
USER	User won

References NONE, and occupied_squares.

Referenced by main().

uint16_t games = 0

Referenced by main(), and setup_board().

enum player occupied_squares[3][3]

Referenced by opponent_turn(), setup_board(), user_turn(), and we_have_a_winner().

const uint8_t square_coord[9][2]

Initial value:

= {
        {SQUARE0_X, SQUARE0_Y,},
        {SQUARE1_X, SQUARE1_Y,},
        {SQUARE2_X, SQUARE2_Y,},
        {SQUARE3_X, SQUARE3_Y,},
        {SQUARE4_X, SQUARE4_Y,},
        {SQUARE5_X, SQUARE5_Y,},
        {SQUARE6_X, SQUARE6_Y,},
        {SQUARE7_X, SQUARE7_Y,},
        {SQUARE8_X, SQUARE8_Y,},
}

Referenced by draw_circle(), draw_cross(), and highlight_square().

char win_string[STRING_LENGTH]

Referenced by setup_board().

uint16_t wins = 0

Referenced by main(), and setup_board().

Microchip® Advanced Software Framework

Macros

Enumerations

Functions

Variables