baf891d878
Implemented features: ball moving, platform moving, showing scores on digital table, game reset.
399 lines
8.2 KiB
Verilog
399 lines
8.2 KiB
Verilog
module Arkanoid
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`include "arkanoid_header.v"
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`include "int_to_digital.v"
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`include "vga_sync.v"
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task GameRestart;
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begin
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ball_x = FIELD_WIDTH/2;
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ball_y = FIELD_HEIGHT-1;
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ball_direction = RIGHT_UP;
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platform1_position = (FIELD_WIDTH-PLATFORM_WIDTH)/2; // central position
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platform2_position = platform1_position;
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game_state = 1'b1;
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end
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endtask
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// Main logic
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always @ (posedge clk25MHz)
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begin
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// Processing button presses
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if (button1 != button1_state)
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begin
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if (button1 == 1'b1)
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begin
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led_[7] = 1'b1;
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led_[6] = 1'b1;
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if (game_state == 1'b0)
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GameRestart;
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else if (platform1_position > 0)
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platform1_position = platform1_position - 1;
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end
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else
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begin
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led_[7] = 1'b0;
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led_[6] = 1'b0;
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end
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button1_state = button1;
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end
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if (button2 != button2_state)
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begin
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if (button2 == 1'b1)
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begin
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led_[5] = 1'b1;
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led_[4] = 1'b1;
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if (game_state == 1'b0)
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GameRestart;
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else if (platform1_position < FIELD_WIDTH-PLATFORM_WIDTH-1)
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platform1_position = platform1_position + 1;
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end
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else
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begin
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led_[5] = 1'b0;
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led_[4] = 1'b0;
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end
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button2_state = button2;
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end
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if (button3 != button3_state)
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begin
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if (button3 == 1'b1)
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begin
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led_[3] = 1'b1;
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led_[2] = 1'b1;
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if (game_state == 1'b0)
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GameRestart;
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else if (platform2_position > 0)
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platform2_position = platform2_position - 1;
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end
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else
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begin
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led_[3] = 1'b0;
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led_[2] = 1'b0;
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end
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button3_state = button3;
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end
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if (button4 != button4_state)
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begin
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if (button4 == 1'b1)
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begin
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led_[1] = 1'b1;
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led_[0] = 1'b1;
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if (game_state == 1'b0)
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GameRestart;
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else if (platform2_position < FIELD_WIDTH-PLATFORM_WIDTH-1)
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platform2_position = platform2_position + 1;
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end
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else
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begin
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led_[1] = 1'b0;
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led_[0] = 1'b0;
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end
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button4_state = button4;
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end
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// Update field (move platforms)
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for (i = 0; i < FIELD_WIDTH; i = i + 1)
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begin
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if ((i >= platform2_position) && (i <= platform2_position+PLATFORM_WIDTH))
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field[0][i] = PLATFORM_CELL;
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else
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field[0][i] = EMPTY_CELL;
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if ((i >= platform1_position) && (i <= platform1_position+PLATFORM_WIDTH))
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field[FIELD_HEIGHT-1][i] = PLATFORM_CELL;
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else
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field[FIELD_HEIGHT-1][i] = EMPTY_CELL;
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end
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//Update field (move ball)
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if (game_state)
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if (ball_clock_counter < BALL_DELAY)
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ball_clock_counter = ball_clock_counter + 1;
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else
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begin
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ball_clock_counter = 0;
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field[ball_y][ball_x] = EMPTY_CELL;
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case (ball_direction)
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LEFT_UP:
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begin
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if ((ball_x > 0) && (ball_y > 1))
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begin
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ball_x = ball_x - 1;
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ball_y = ball_y - 1;
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end
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else if ((ball_x > 0) && (ball_y == 1))
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if ((ball_x >= platform2_position) && (ball_x <= platform2_position + PLATFORM_WIDTH))
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begin
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ball_direction = LEFT_DOWN;
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ball_x = ball_x - 1;
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ball_y = ball_y + 1;
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end
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else
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begin
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// Goal
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player1_score = player1_score + 1;
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game_state = 1'b0;
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end
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else if ((ball_x == 0) && (ball_y > 1))
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begin
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ball_direction = RIGHT_UP;
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ball_x = ball_x + 1;
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ball_y = ball_y - 1;
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end
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else
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begin
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ball_direction = RIGHT_DOWN;
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ball_x = ball_x + 1;
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ball_y = ball_y + 1;
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end
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end
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RIGHT_UP:
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begin
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if ((ball_x < FIELD_WIDTH-1) && (ball_y > 1))
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begin
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ball_x = ball_x + 1;
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ball_y = ball_y - 1;
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end
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else if ((ball_x < FIELD_WIDTH-1) && (ball_y == 1))
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if ((ball_x >= platform2_position) && (ball_x <= platform2_position + PLATFORM_WIDTH))
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begin
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ball_direction = RIGHT_DOWN;
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ball_x = ball_x + 1;
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ball_y = ball_y + 1;
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end
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else
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begin
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// Goal
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player1_score = player1_score + 1;
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game_state = 1'b0;
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end
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else if ((ball_x == FIELD_WIDTH-1) && (ball_y > 1))
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begin
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ball_direction = LEFT_UP;
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ball_x = ball_x - 1;
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ball_y = ball_y - 1;
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end
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else
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begin
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ball_direction = LEFT_DOWN;
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ball_x = ball_x - 1;
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ball_y = ball_y + 1;
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end
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end
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LEFT_DOWN:
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begin
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if ((ball_x > 0) && (ball_y < FIELD_HEIGHT-2))
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begin
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ball_x = ball_x - 1;
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ball_y = ball_y + 1;
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end
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else if ((ball_x > 0) && (ball_y == FIELD_HEIGHT-2))
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if ((ball_x >= platform1_position) && (ball_x <= platform1_position + PLATFORM_WIDTH))
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begin
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ball_direction = LEFT_UP;
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ball_x = ball_x - 1;
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ball_y = ball_y - 1;
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end
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else
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begin
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// Goal
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player2_score = player2_score + 1;
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game_state = 1'b0;
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end
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else if ((ball_x == 0) && (ball_y < FIELD_HEIGHT-2))
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begin
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ball_direction = RIGHT_DOWN;
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ball_x = ball_x + 1;
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ball_y = ball_y + 1;
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end
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else
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begin
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ball_direction = RIGHT_UP;
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ball_x = ball_x + 1;
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ball_y = ball_y - 1;
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end
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end
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RIGHT_DOWN:
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begin
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if ((ball_x < FIELD_WIDTH-1) && (ball_y < FIELD_HEIGHT-2))
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begin
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ball_x = ball_x + 1;
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ball_y = ball_y + 1;
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end
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else if ((ball_x < FIELD_WIDTH-1) && (ball_y == FIELD_HEIGHT-2))
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if ((ball_x >= platform1_position) && (ball_x <= platform1_position + PLATFORM_WIDTH))
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begin
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ball_direction = RIGHT_UP;
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ball_x = ball_x + 1;
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ball_y = ball_y - 1;
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end
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else
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begin
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// Goal
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player2_score = player2_score + 1;
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game_state = 1'b0;
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end
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else if ((ball_x == FIELD_WIDTH-1) && (ball_y < FIELD_HEIGHT-2))
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begin
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ball_direction = LEFT_DOWN;
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ball_x = ball_x - 1;
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ball_y = ball_y + 1;
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end
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else
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begin
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ball_direction = LEFT_UP;
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ball_x = ball_x - 1;
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ball_y = ball_y - 1;
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end
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end
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endcase
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if (game_state)
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field[ball_y][ball_x] = BALL_CELL;
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end
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// Update scores
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IntToDigital(player1_score, hex3_, hex2_);
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IntToDigital(player2_score, hex1_, hex0_);
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// VGA output
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h_cell = (h_counter-143)/CELL_SIZE;
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v_cell = (v_counter-34)/CELL_SIZE;
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if ((v_counter > 34) && (v_counter < 514) && (h_counter > 143) && (h_counter < 783))
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begin
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current_cell = field[v_cell][h_cell];
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case(current_cell)
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EMPTY_CELL:
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begin
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red_ = BK_COLOR_R;
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green_ = BK_COLOR_G;
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blue_ = BK_COLOR_B;
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end
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STABLE_CELL:
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begin
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red_ = STABLE_COLOR_R;
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green_ = STABLE_COLOR_G;
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blue_ = STABLE_COLOR_B;
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end
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BALL_CELL:
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begin
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red_ = BALL_COLOR_R;
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green_ = BALL_COLOR_G;
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blue_ = BALL_COLOR_B;
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end
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PLATFORM_CELL:
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begin
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red_ = PLATFORM_COLOR_R;
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green_ = PLATFORM_COLOR_G;
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blue_ = PLATFORM_COLOR_B;
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end
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endcase
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end
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else
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begin
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red_ = 4'b0000;
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green_ = 4'b0000;
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blue_ = 4'b0000;
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end
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end
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// Initialization of all module variables
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initial
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begin
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game_state = 1'b0;
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// Reset scores
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player1_score = 0;
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player2_score = 0;
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// Place ball to the center of the screen
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ball_clock_counter = 0;
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ball_x = FIELD_WIDTH/2;
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ball_y = FIELD_HEIGHT-1;
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ball_direction = RIGHT_UP;
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// Place platforms at the center of the borders
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platform1_position = (FIELD_WIDTH-PLATFORM_WIDTH)/2; // central position
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platform2_position = platform1_position;
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// Clear field
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for (i = 0; i < FIELD_HEIGHT; i = i + 1)
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for (j = 0; j< FIELD_WIDTH; j = j + 1)
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field[i][j] = EMPTY_CELL;
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// Reset buttons state
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button1_state = 1'b0;
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button2_state = 1'b0;
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button3_state = 1'b0;
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button4_state = 1'b0;
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// Reset VGA counters
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h_counter = 0;
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v_counter = 0;
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end
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assign h_sync = ~((h_counter > 0) && (h_counter < 95));
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assign v_sync = ~((v_counter == 0) || (v_counter == 1));
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assign red = red_;
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assign green = green_;
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assign blue = blue_;
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assign hex0 = ~hex0_;
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assign hex1 = ~hex1_;
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assign hex2 = ~hex2_;
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assign hex3 = ~hex3_;
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assign led = ~led_;
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endmodule
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