onewirespi.java

Is a Application Demo (an example) of how to use the package LCD in order to make an application sta

package etaai.lcd.onewire.spi;

import etaai.containers.DS2406;
import com.dalsemi.onewire.adapter.*;
import com.dalsemi.onewire.*;
import etaai.lcd.onewire.spi.*;
import com.dalsemi.onewire.container.OneWireContainer12;

/**
 * Title:        Serial LCD
 * Description:  Comnada display lcd pe seriala
 * Copyright:    Copyright (c) 2001
 * Company:      ETA AI
 * @author Mircea Pop
 * @version 1.0
 */

public class OneWireSPI
{
  /**The two DS2406 senzors that comunicate with Cristalfontz LCD*/
  private DS2406 SPI_Data,SPI_CP;

  /**
   * The Class SPI implements  SPI comunication using 2 DS2406 chips from Dalas Semiconductors
   * @param DSPortAdapter 1-wire port adapter
   * @param String adresa1 First Ds2406 ship address
   *        PIOA - data line (SPI_DATA)
   *        PIOB - closk line (SPI_CLK)
   * @param String adresa2 Second DS2406 chip address
   *
   *        PIOA - CHIP_SELECT
   *        PIOB - /BUSY
   * @throws Exception Whne cannot access either DS2406 chips
   */
  public OneWireSPI(DSPortAdapter adapter ,String adresa1,String adresa2) throws Exception
  {
    SPI_Data = new DS2406(adapter,adresa1,"Port Date",0);
    SPI_CP   = new DS2406(adapter,adresa2,"Selectare Chip_BUSY",0);

    //Initialization SPI_CLK and SPI_CS
    SPI_Data.setStareCanal(1,false);//clock la 5V
    SPI_CP.setStareCanal(0,false);//Chip_Select 5V
  }

  /**
   * Data send method
   * @param int Data that will be sent to lcd
   *
   * @throws SPIException When data error transmision occurs
   */
  public void sendSPIData(int data) throws OneWireSPIException
  {
      byte[] aux = new byte[1];
      aux[0] = (byte)data;
      sendSPIData(aux);
  }

  /**
   * Data send method
   * @param String Data that will be sent to lcd
   *
   * @throws SPIException When data error transmision occurs
   */
  public void sendSPIData(String data) throws OneWireSPIException
  {
    sendSPIData(data.getBytes());
  }

  /**
   * Data send method
   * @param byte[] data Data that will be sent to lcd
   *
   * @throws SPIException When data error transmision occurs
   */
  public void sendSPIData(byte[] data) throws OneWireSPIException
  {
    if(SPI_CP.getState() || SPI_Data.getState()) throw new OneWireSPIException("Dispozitiv comunicare este stricat!");
    //calculate bits that will be sent
    data = CalculVectorDate(data);

    SPI_Data.setStareCanal(1,false);//sets clock 5V
    SPI_CP.setStareCanal(0,true);//sels lcd_chip_select 0V

    try{Thread.sleep(50);}catch(InterruptedException _){}

    data = SPI_Data.channelAccess(data,false,false,OneWireContainer12.CRC_DISABLE,OneWireContainer12.CHANNEL_BOTH,false,false);

    try{Thread.sleep(20);}catch(InterruptedException _){}

    //Dezactivare SPI_CS & clock

    SPI_Data.setStareCanal(1,false);//Sets clock output to 5V
    SPI_CP.setStareCanal(0,false);//Sets SPI_CS to 5V

  }

  /**
   * Calculates bit sequence that will be send to the lcd display
   */
  private byte[] CalculVectorDate(byte[] data)
  {
    int lungime = data.length * 4;
    int lungime_data = data.length;
    byte [] aux = new byte[lungime];
    int k = 0;
    int x,y,z;

    for(int i=0;i<lungime_data;i++)
    {
      y = data[i];
      x = y;
      y = y >> 6;
      z = 0x22 | (0x55 & ((y & 1) << 6) | ((y & 1) << 4) | ((y & 2) << 1) | ((y & 2) >> 1));
      aux[k++] = (byte)z;

      y = x >> 4;
      z = 0x22 | (0x55 & ((y & 1) << 6) | ((y & 1) << 4) | ((y & 2) << 1) | ((y & 2) >> 1));
      aux[k++] = (byte)z;

      y = x >> 2;
      z = 0x22 | (0x55 & ((y & 1) << 6) | ((y & 1) << 4) | ((y & 2) << 1) | ((y & 2) >> 1));
      aux[k++] = (byte)z;

      y = x;
      z = 0x22 | (0x55 & ((y & 1) << 6) | ((y & 1) << 4) | ((y & 2) << 1) | ((y & 2) >> 1));
      aux[k++] = (byte)z;
    }

    return aux;
  }
}