io.mapsmessaging.devices.i2c.devices.output.led.ht16k33.QuadAlphaNumeric Maven / Gradle / Ivy

/*
 *      Copyright [ 2020 - 2023 ] [Matthew Buckton]
 *
 *      Licensed under the Apache License, Version 2.0 (the "License");
 *      you may not use this file except in compliance with the License.
 *      You may obtain a copy of the License at
 *
 *          http://www.apache.org/licenses/LICENSE-2.0
 *
 *      Unless required by applicable law or agreed to in writing, software
 *      distributed under the License is distributed on an "AS IS" BASIS,
 *      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *      See the License for the specific language governing permissions and
 *      limitations under the License.
 */

package io.mapsmessaging.devices.i2c.devices.output.led.ht16k33;

import io.mapsmessaging.devices.impl.AddressableDevice;

import java.io.IOException;

public class QuadAlphaNumeric extends HT16K33Driver {

  private final byte[] buf = new byte[8];

  public QuadAlphaNumeric(AddressableDevice device) throws IOException {
    super(device, Constants.ALPHA_NUMERIC_MAPPING);
  }

  public byte[] encode(String val) {
    for (int x = 0; x < buf.length; x++)
      buf[0] = 0;
    int len = val.length();
    int bufIdx = 0;
    for (int x = 0; x < len; x++) {
      short map = font[val.charAt(x)];
      buf[bufIdx * 2] = (byte) (map & 0xff);
      buf[bufIdx * 2 + 1] = (byte) ((map >> 8) & 0xff);
      if (x + 1 < len && val.charAt(x + 1) == '.') {
        buf[bufIdx * 2 + 1] = (byte) (buf[bufIdx * 2 + 1] | 0x40);
        x++; // Set the . and skip to the next char
      }
      bufIdx++;
      if (bufIdx > 3)
        break;
    }
    return buf;
  }

  @Override
  public String getName() {
    return "Quad Alpha-Numeric LED";
  }

  @Override
  public String getDescription() {
    return "Quad Alpha-Numeric LED";
  }

}