User`s manual

391 ///////////////////////////////////////////////////////////////////////////////////////////////////

392 wire acc_ready;

393 wire signed [15:0] acc_x;

394 wire signed [15:0] acc_y;

395 reg signed [15:0] acc_x_reg;

396 reg signed [15:0] acc_y_reg;

397 acc a(.clk(sys_clk), .sdo(user1[0]), .reset(reset),

398 .ncs(user1[1]), .sda(user1[2]), .scl(user1[3]),

399 .ready(acc_ready), .x(acc_x), .y(acc_y));

400

401 always @(posedge slow_clk) begin

402 acc_x_reg <= acc_ready ? acc_x : 0;

403 acc_y_reg <= acc_ready ? acc_y : 0;

404 end

405

406 wire[11:0] accel_val;

407 wire[75:0] quad_corners;

408 wire[9:0] x1_raw;

409 wire[8:0] y1_raw;

410 wire[9:0] x2_raw;

411 wire[8:0] y2_raw;

412 wire[9:0] x3_raw;

413 wire[8:0] y3_raw;

414 wire[9:0] x4_raw;

415 wire[8:0] y4_raw;

416 wire[9:0] x1;

417 wire[8:0] y1;

418 wire[9:0] x2;

419 wire[8:0] y2;

420 wire[9:0] x3;

421 wire[8:0] y3;

422 wire[9:0] x4;

423 wire[8:0] y4;

424 wire[9:0] display_x;

425 wire[8:0] display_y;

426 assign accel_val = {~acc_x_reg[15], acc_x_reg[7:4], 1’b0,

427 ~acc_y_reg[15], acc_y_reg[7:4], 1’b0};

428 accel_lut accel_lut(.clk(slow_clk),

429 .accel_val(accel_val),

430 .quad_corners(quad_corners));

431 assign y4_raw = quad_corners[8:0];

432 assign x4_raw = quad_corners[18:9];

433 assign y3_raw = quad_corners[27:19];

434 assign x3_raw = quad_corners[37:28];

435 assign y2_raw = quad_corners[46:38];

436 assign x2_raw = quad_corners[56:47];