4  * SPDX-License-Identifier: Apache-2.0
21 /* The micro:bit has a 5x5 LED display, using (x, y) notation the top-left
22  * corner has coordinates (0, 0) and the bottom-right has (4, 4). To make
24  * system where top-left is (0, 0) and bottom-right is (49, 49).
37 #define BALL_VEL_Y_START  -4           /* Default ball vertical speed */
52 /* Ball starting position (just to the left of the paddle mid-point) */
120 static const struct gpio_dt_spec sw0_gpio = GPIO_DT_SPEC_GET(DT_ALIAS(sw0), gpios);
121 static const struct gpio_dt_spec sw1_gpio = GPIO_DT_SPEC_GET(DT_ALIAS(sw1), gpios);
124 BUILD_ASSERT(DT_SAME_NODE(DT_GPIO_CTLR(DT_ALIAS(sw0), gpios), DT_GPIO_CTLR(DT_ALIAS(sw1), gpios)));
161 			 SCROLL_SPEED, "%s", select->choice[select_idx].str);  in pong_select()
168 	select_idx = (select_idx + 1) % select->choice_count;  in pong_select_change()
170 			 SCROLL_SPEED, "%s", select->choice[select_idx].str);  in pong_select_change()
176 	void (*complete)(int val) = select->complete;  in pong_select_complete()
177 	int val = select->choice[select_idx].val;  in pong_select_complete()
192 		ball_pos.y = -1;  in game_init()
245 		delta = a_timestamp - b_timestamp;  in check_start()
247 		delta = b_timestamp - a_timestamp;  in check_start()
264 		ball_vel.x = -2 - rnd;  in check_start()
342 			ball_pos.y = -ball_pos.y;  in game_refresh()
343 			ball_vel.y = -ball_vel.y;  in game_refresh()
346 			ble_send_ball(BALL_POS_X_MAX - ball_pos.x, ball_pos.y,  in game_refresh()
347 				      -ball_vel.x, -ball_vel.y);  in game_refresh()
353 	/* Check for side-wall collision */  in game_refresh()
355 		ball_pos.x = -ball_pos.x;  in game_refresh()
356 		ball_vel.x = -ball_vel.x;  in game_refresh()
359 		ball_pos.x = (2 * BALL_POS_X_MAX) - ball_pos.x;  in game_refresh()
360 		ball_vel.x = -ball_vel.x;  in game_refresh()
375 		ball_pos.y = (2 * BALL_POS_Y_MAX) - ball_pos.y;  in game_refresh()
382 		ball_vel.y = -ball_vel.y;  in game_refresh()
421 	if (ended && (k_uptime_get() - ended) > RESTART_THRESHOLD) {  in button_pressed()
425 			printk("WARNING: Data-race (work and event)\n");  in button_pressed()
451 			paddle_x--;  in button_pressed()
453 				ball_pos.x -= PIXEL_SIZE;  in button_pressed()
504 		printk("%s: device not ready.\n", sw0_gpio.port->name);  in configure_buttons()
529 		printk("%s: device not ready.\n", pwm.dev->name);  in main()
548 		img.row[PADDLE_ROW] = (BIT(paddle_x) | BIT(paddle_x + 1));  in main()
551 			img.row[VIRT_TO_REAL(ball_pos.y)] =  in main()