module top (input CLK, output LED1, LED2, LED3, LED4, LED5,
            input SCL, inout SDA, output ACK,
            input COM_RX, output COM_TX, COM_DCD, COM_DSR, COM_RTS);

  reg [7:0] I2C_TX;   //  TRANSMITTED TO MASTER
  initial begin
    I2C_TX = 22;
  end
  wire [7:0] I2C_RX;  //  RECEIVED FROM MASTER
  wire [7:0] RAM_RD;
  wire I2C_TRANS, I2C_READ, I2C_ACK, I2C_ACK_MSTR_CTRL, I2C_WR;
  wire [9:0] I2C_COUNTER;
  i2c_slave I2C (CLK, SCL, SDA, I2C_TRANS, I2C_READ, I2C_ACK, I2C_WR, //I2C_ACK_MSTR_CTRL,
                I2C_RX, I2C_TX, I2C_COUNTER);

  reg UART_WR, UART_DTR, UART_RTS, UART_DCD;
  reg [7:0] UART_TX_DATA;
  wire UART_ACTIVE, UART_TX_LINE;
  reg [23:0] uart_counter;
  initial begin
    UART_WR = 0;
    UART_TX = 1;
    UART_RTS = 1;
    UART_DTR = 0;
    UART_DCD = 0;
  end
  uart UART (CLK, UART_WR, UART_TX_DATA, UART_ACTIVE, UART_TX_LINE);

  reg wr_old;
  reg [7:0] ram_adress;
  reg RAM_W;
  initial begin
    ram_adress = 0;
    RAM_W = 0;
  end
  ram RAM (CLK, RAM_W, ram_adress, I2C_RX, RAM_RD);



  always @ (posedge CLK) begin
    if ((wr_old == 0) && (I2C_WR == 1) && I2C_READ) begin
      //I2C_TX = I2C_TX + 5;
      //  READ
      I2C_TX = RAM_RD;              //  READ FROM CURRENT ADRESS
      //ram_adress <= ram_adress + 1; //  AND INCREMENT ADRESS (ASSIGNED IN THE NEXT TACT)
      UART_WR = 1;
      UART_TX_DATA = I2C_TX;
    end
    else if ((wr_old == 0) && (I2C_WR == 1) && (I2C_READ == 0)) begin
      //  RAM MODULE WRITES TO RAM IN THE CURRENT ADRESS
      if (I2C_COUNTER == 2)
        ram_adress = I2C_RX;
      else  begin
        RAM_W = 1;
        //ram_adress <= ram_adress + 1; //  ONLY INCREMENT ADRESS IN THE NEXT TACT
      end
      UART_WR = 1;
      UART_TX_DATA = I2C_RX;
    end
    else if ((wr_old == 1) && (I2C_WR == 0))  begin
      RAM_W = 0;
      UART_WR = 0;
      if ((I2C_COUNTER != 2) || (I2C_READ == 1))
        ram_adress <= ram_adress + 1; //  ONLY INCREMENT ADRESS IN THE NEXT TACT
    end
    wr_old = I2C_WR;
/*
    uart_counter = uart_counter + 1;
    if (uart_counter == 12000000) begin
      uart_counter = 0;
      UART_TX_DATA = UART_TX_DATA + 1;
      UART_WR = 1;
      UART_RTS = UART_RTS ^ 1;
      if (UART_RTS)
        UART_DTR = UART_DTR ^ 1;
      if (UART_DTR == 1)
        UART_DCD = UART_DCD ^ 1;
    end
    else if (uart_counter == 5)
      UART_WR = 0;*/
  end

  assign I2C_W = I2C_WR & (I2C_READ ^ 1);

  assign LED5 = I2C_TRANS;
  //assign LED5 = COM_RX;
  assign LED1 = ram_adress[0];//I2C_RX[0];
  assign LED2 = ram_adress[1];
  assign LED3 = ram_adress[2];
  assign LED4 = ram_adress[3];
  assign ACK = I2C_READ;//I2C_WR; //I2C_ACK;

  assign COM_TX = UART_TX_LINE;//COM_RX;
  //assign COM_RTS = I2C_READ;
  assign COM_RTS = I2C_READ;//UART_RTS;
  assign COM_DSR = I2C_TRANS | UART_ACTIVE;//UART_DTR;
  //assign COM_DCD = UART_DCD;

/*  reg [24:0] counter;

  always @ (posedge CLK) begin
    counter = counter + 1;
  end

  assign LED1 = ~counter[24] & ~counter[23];
  assign LED2 = ~counter[24] & counter[23];
  assign LED3 = counter[24] & ~counter[23];
  assign LED4 = counter[24] & counter[23];
  assign LED5 = counter[23];*/

endmodule //top