User`s manual

571 assign reset_slow = reset_count != 0;

572

573 //

574 // I2C driver

575 //

576

577 reg load;

578 reg [7:0] data;

579 wire ack, idle;

580

581 i2c i2c(.reset(reset_slow), .clock4x(clock_slow), .data(data), .load(load),

582 .ack(ack), .idle(idle), .scl(tv_in_i2c_clock),

583 .sda(tv_in_i2c_data));

584

585 //

586 // State machine

587 //

588

589 reg [7:0] state;

590 reg tv_in_reset_b;

591 reg old_source;

592

593 always @(posedge clock_slow)

594 if (reset_slow)

595 begin

596 state <= 0;

597 load <= 0;

598 tv_in_reset_b <= 0;

599 old_source <= 0;

600 end

601 else

602 case (state)

603 8’h00:

604 begin

605 // Assert reset

606 load <= 1’b0;

607 tv_in_reset_b <= 1’b0;

608 if (!ack)

609 state <= state+1;

610 end

611 8’h01:

612 state <= state+1;

613 8’h02:

614 begin

615 // Release reset

616 tv_in_reset_b <= 1’b1;