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ball_v0.sv
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ball_v0.sv
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module ball ( input logic Reset, frame_clk,
input logic move_up, move_left, move_right,
input logic [9:0] init_X, init_Y,
input logic [0:29][0:39] tile,
input [9:0] buttonX[4], buttonY[4], buttonMotion[2], pfX[2], pfY[2],
input logic [9:0] spike_row[3], spike_col[3],
input logic spike_harm[3], // at this moment, is the spike harmful?
input logic [9:0] slim_row[3], slim_col[3],
input logic slim_dead[3],
output logic [9:0] Ball_X, Ball_Y, BallH, BallW, Collision_h, Collision_w,
output logic move_x_dir, dead,
output logic [3:0] frame,
output logic harm_state,
output logic [1:0] harm,
output logic buttonOn[4]);
logic [9:0] Ball_X_Motion, Ball_Y_Motion, BallX, BallY;
logic [9:0] Ball_X_Pos_n, Ball_Y_Pos_n; // ignore collision
logic [9:0] Ball_Height, Ball_Width;
logic up, left, right, down, ground; // collision
logic harm_spike, harm_slim; // go dead straight or can be harmed several times?
logic left_pf[2], right_pf[2], up_pf[2], down_pf[2], ground_pf[2]; // collistion with platform
logic [1:0] count_acc;
logic [4:0] count_idle;
logic [5:0] count_run;
logic animation; // 0: idle; 1: run
logic [5:0] count;
assign Ball_X_Pos_n = BallX + Ball_X_Motion;
assign Ball_Y_Pos_n = BallY + Ball_Y_Motion;
assign dead = ((~harm[0]) && (~harm[1]));//harm = 00
parameter [9:0] Ball_X_Step=1; // Step size on the X axis
parameter [9:0] Ball_Y_Step=1; // Step size on the Y axis
// size of the box collider
assign Collision_h = 15;
assign Collision_w = 4;
// size of the player
assign Ball_Height = 37; // assigns the value 4 as a 10-digit binary number, ie "0000000100"
assign Ball_Width = 50;
logic [9:0] col_left, col_right, row_up, row_down, row_ground, col;
ch_spike harmBySpike(.col_left(col_left), .col_right(col_right), .row_ground(row_ground),
.spike_row(spike_row), .spike_col(spike_col), .spike_harm(spike_harm), .ch_harm(harm_spike));
ch_slim harmBySlim(.col_left(col_left), .col_right(col_right), .row_ground(row_ground),
.slim_dead(slim_dead), .slim_row(slim_row), .slim_col(slim_col),.ch_harm(harm_slim));
ch_button triggerbutton(.BallX(BallX), .row_ground(row_ground),
.buttonX(buttonX), .buttonY(buttonY),
.buttonOn(buttonOn));
// always_ff @ (posedge Reset or posedge harm_spike or posedge harm_slim)
// begin
// if(count == 4'b0) harm_state <= 1'b1;
// if(harm_spike || harm_slim)
// begin
// if(harm_state == 1'b1)
// begin
// harm_state <= 1'b0;
// harm <= harm-1'b1;
// end
// end
// end
always_ff @ (posedge Reset or posedge frame_clk)
begin
if(Reset) count<=6'b0;
else if(harm_state) count<=count+1'b1;
else count <= 6'b0;
end
always_comb
begin: get_frame
if (animation==1'b0) frame = {1'b0,count_idle[4:3]}; // idle
else // run
begin
unique case (count_run[5:3])
3'b000: frame = 3'h4;
3'b001: frame = 3'h5;
3'b010: frame = 3'h5;
3'b011: frame = 3'h6;
3'b100: frame = 3'h7;
3'b101: frame = 3'h8;
3'b110: frame = 3'h8;
3'b111: frame = 3'h9;
endcase
end
end
always_comb
begin: collision_check
col_left = (BallX-Collision_w-1-Ball_X_Step)>>4;
col_right = (BallX+Collision_w+1+Ball_X_Step)>>4;
row_up = (Ball_Y_Pos_n-Collision_h-1)>>4; // up
row_down = (Ball_Y_Pos_n+Collision_h)>>4; // down
row_ground = (BallY+Collision_h+1)>>4;
// collision in the next frame in 4 directions?
left = tile[(BallY-Collision_h)>>4][col_left]
|| tile[(BallY+Collision_h)>>4][col_left]
|| tile[BallY>>4][col_left]
|| left_pf[0] || left_pf[1];
right = tile[(BallY-Collision_h)>>4][col_right]
|| tile[(BallY+Collision_h)>>4][col_right]
|| tile[BallY>>4][col_right]
|| right_pf[0] || right_pf[1];
up = tile[row_up][(BallX-Collision_w)>>4]
|| tile[row_up][(BallX+Collision_w)>>4];
down = tile[row_down][(BallX-Collision_w)>>4]
|| tile[row_down][(BallX+Collision_w)>>4];
ground = tile[row_ground][(BallX-Collision_w)>>4]
|| tile[row_ground][(BallX+Collision_w)>>4]
|| ground_pf[0] || ground_pf[1];
for(int i=0; i<2; i++)
begin
left_pf[i] = (BallX - 5 <= pfX[i]+48)
&& (BallX - 5 >= pfX[i])
&& (BallY>pfY[i]-Collision_h)
&& (BallY<pfY[i]+Collision_h+16);
right_pf[i] = (BallX + 5 >= pfX[i])
&& (BallX + 5 <= pfX[i]+48)
&& (BallY>pfY[i]-Collision_h)
&& (BallY<pfY[i]+Collision_h+16);
up_pf[i] = (Ball_Y_Pos_n-Collision_h <= pfY[i]+buttonMotion[i]+16) // the botton of the pf is lower than the top of ch
&& (Ball_Y_Pos_n-Collision_h >= pfY[i]+buttonMotion[i])
&& (BallX>pfX[i]-Collision_w)
&& (BallX<pfX[i]+Collision_w+48);
down_pf[i] = (Ball_Y_Pos_n+Collision_h >= pfY[i]+buttonMotion[i]) // the top of the pf is higher than the bottom of ch
&& (Ball_Y_Pos_n+Collision_h <= pfY[i]+buttonMotion[i]+16)
&& (BallX>pfX[i]-Collision_w)
&& (BallX<pfX[i]+Collision_w+48);
ground_pf[i] = (BallY+Collision_h == pfY[i])
&& (BallX>pfX[i]-Collision_w)
&& (BallX<pfX[i]+Collision_w+48);
end
end
always_ff @ (posedge Reset or posedge dead or posedge frame_clk )
begin: Move_Ball
if (Reset) // Asynchronous Reset
begin
Ball_X_Motion <= 10'd0; //Ball_Y_Step;
Ball_Y_Motion <= 10'd0; //Ball_X_Step;
BallY <= init_Y;
BallX <= init_X;
count_acc <= 2'b00;
count_idle <= 5'b0;
count_run <= 6'b0;
move_x_dir <= 1'b0;
harm <= 2'b11;
animation <= 1'b0;
//dead <= 1'b0;
end
else if(dead)
begin
Ball_Y_Motion <= 0;
Ball_X_Motion <= 0;
move_x_dir <= move_x_dir;
end
else
begin
// get next Y_motion
if(ground)
begin
// first check spike
if(move_up) Ball_Y_Motion <= -5;
else Ball_Y_Motion <= 0;
count_acc <= 2'b00;
end
else if (up | down | up_pf[0] | up_pf[1] | down_pf[0] | down_pf[1]) Ball_Y_Motion <= 0; // up collision
else if (Ball_Y_Motion[9]==0 && (Ball_Y_Motion > 14)) Ball_Y_Motion <= 15; // max motion
else // in the air and no obstacle， have acceleration
begin
count_acc <= count_acc + 1;
if (count_acc == 2'b00) Ball_Y_Motion <= Ball_Y_Motion + 1;
end
// get next X_motion
case ({move_left, move_right})
2'b01 :
begin
begin
if (!right)
begin
Ball_X_Motion <= Ball_X_Step; // move right
animation <= 1'b1; // enter running animation when having horizontal position change
end
move_x_dir <= 0;
end
end
2'b10 :
begin
begin
if (!left && BallX>30)
begin
Ball_X_Motion <= (~ (Ball_X_Step) + 1'b1); // 2's complement; move left
animation <= 1'b1;
end
move_x_dir <= 1;
end
end
default :
begin
Ball_X_Motion <= 1'b0;
end
endcase
// get next position
if(BallX<=30 && move_left) BallX <= 30;
else if ((left & move_left) | (right & move_right)) BallX <= BallX;
else BallX <= BallX+Ball_X_Motion;
if (down) BallY <= (row_down<< 4) - Collision_h - 1; //BallY; -1 prevent it from stucking horizontally
else if(up) BallY <= ((row_up + 1) << 4) + Collision_h + 1;
else if (down_pf[0]) BallY <= pfY[0] + buttonMotion[0] - Collision_h;
else if (down_pf[1]) BallY <= pfY[1] + buttonMotion[1] - Collision_h;
else if (up_pf[0]) BallY <= pfY[0] + buttonMotion[0] + 16 - Collision_h;
else if (up_pf[1]) BallY <= pfY[1] + buttonMotion[1] + 16 - Collision_h;
else BallY <= BallY+Ball_Y_Motion;
// update frame counter
count_idle <= count_idle + 1;
if (animation == 1'b1) count_run <= count_run + 1; // count only in the running animation
if (Ball_X_Motion==0) animation <= 1'b0; // exit when finish displaying 8 fr
if(count == 6'hFF)
begin
harm_state <= 1'b0;
end
if(count == 6'h01) harm <= harm - 1'b1;
if(harm_spike || harm_slim)
begin
//if(harm_state == 1'b0) harm <= harm--;
harm_state<=1'b1;
end
end
end
// size of the character
assign BallH = Ball_Height;
assign BallW = Ball_Width;
assign Ball_X = BallX-25;
assign Ball_Y = BallY-21;
//assign move_x_dir = Ball_X_Motion[9];
endmodule
module ch_spike (input [9:0] col_left, col_right, row_ground,
input [9:0] spike_row[3], spike_col[3],
input spike_harm[3], output logic ch_harm);
logic spike_attack[3];
always_comb
begin
for(int i=0; i<3; i++)
begin
if((spike_col[i]==col_left || spike_col[i]==col_right || spike_col[i]+1'b1==col_left || spike_col[i]+1'b1==col_right)
&& spike_row[i]==row_ground && spike_harm[i]==1'b1)
spike_attack[i] = 1'b1;
else spike_attack[i] = 1'b0;
end
ch_harm = spike_attack[0] || spike_attack[1] || spike_attack[2];
end
endmodule
module ch_slim (input [9:0] col_left, col_right, row_ground,
input [9:0] slim_row[3], slim_col[3],
input slim_dead[3],
output logic ch_harm);
logic slim_attack[3];
always_comb
begin
for(int i=0; i<3; i++)
begin
if((slim_col[i]==col_left || slim_col[i]==col_right || slim_col[i]+1'b1==col_left || slim_col[i]+1'b1==col_right)
&& (slim_row[i]-2) < row_ground && (slim_row[i]+2) > row_ground && (slim_dead[i] == 1'b0))
slim_attack[i] = 1'b1;
else slim_attack[i] = 1'b0;
end
ch_harm = slim_attack[0] || slim_attack[1] || slim_attack[2];
end
endmodule
module ch_button (input [9:0] BallX, row_ground,
input [9:0] buttonX[4], buttonY[4],
output logic buttonOn[4]);
always_comb
begin
for(int i=0; i<4; i++)
begin
if(BallX > (buttonX[i]<<4) && BallX < (buttonX[i]<<4)+16
&& buttonY[i]==row_ground)
buttonOn[i] = 1'b1;
else buttonOn[i] = 1'b0;
end
end
endmodule