Package com.gmv.its.deepsy.hal.gpio

Classes
interface	Gpio
	Gpio. More...
interface	GpioConfiguration
	Gpio Configuration. More...
interface	GpioConfigurationEvent
	Gpio Configuration event. More...
enum	GpioDirection
enum	GpioEdgetype
interface	GpioEvent
interface	GpioInformation
	Gpio Information. More...
class	GpioLowLevelException
	Gpio low level exception. More...
interface	GpioManager
	Gpio Manager. More...
class	GpioNotAvailableException
	Gpio not available exception. More...
class	GpioObserver
	Gpio event. More...
interface	GpioStatus
	Gpio Status. More...
interface	GpioStatusEvent
	Gpio Status event. More...

Detailed Description

To work with Deepsy gpio service it is necessary to use DeepsyGpioManager located in com.gmv.its.deepsy.gpio for getting the initial GpioManager object.

GpioManager gpioManager = DeepsyGpioManager.getInstance();

DeepsyGpioManager.getInstance has an optional parameter indicating the ip address of remote service. For instance:

GpioManager gpioManager = DeepsyGpioManager.getInstance("192.168.1.10");

GpioManager is an AutoCloseable interface. An object that may hold resources (such as file or socket handles) until it is closed. The close() method of an AutoCloseable object is called automatically when exiting a try-with-resources block for which the object has been declared in the resource specification header. This construction ensures prompt release, avoiding resource exhaustion exceptions and errors that may otherwise occur. To obtain a list of Gpio objects:

try (GpioManager gpioManager = DeepsyGpioManager.getInstance()){
    List<Gpio> gpioList = gpioManager.getGpios();
} catch (GpioNotAvailableException e) {
        e.printStackTrace();
} catch (GpioLowLevelException e) {
        e.printStackTrace();
}

If this object is not inside a try with resources block, it is recommended to call to gpioManager.close() in order to finalize properly;

gpioManager.close();

Examples

• Get Gpios
  

  
  package com.gmv.its.dpyjavaexamples.gpio;
  
  import java.util.List;
  import com.gmv.its.deepsy.hal.gpio.*;
  import com.gmv.its.deepsy.gpio.*;
  
  public class GetGpiosApp {
      public static void main(String[] args) {
  
          try (DeepsyGpioManager gpioManager = DeepsyGpioManager.getInstance("172.22.198.105")) {
              List<Gpio> gpioList = gpioManager.getGpios();
  
              System.out.println("There are " + gpioList.size() + " GPIOS");
              for (Gpio g : gpioList) {
                  System.out.printf("Gpio id : %s\n", g.getId());
                  System.out.printf("%20s : %s\n", "Alias", g.getConfiguration().getAlias());
                  System.out.printf("%20s : %s\n", "Type", g.getInformation().getType());
                  System.out.printf("%20s : %s\n", "Address", g.getInformation().getAddress());
                  System.out.printf("%20s : %s\n", "Direction", g.getInformation().getDirection());
                  System.out.printf("%20s : %s\n", "Default Value", g.getConfiguration().getDefaultvalue());
                  System.out.printf("%20s : %s\n", "Active Low", g.getConfiguration().getActivelow());
                  System.out.printf("%20s : %s\n", "Edge type", g.getConfiguration().getEdgetype());
                  System.out.printf("%20s : %s\n", "Publish", g.getConfiguration().getPublish());
                  System.out.printf("%20s : %s\n", "Bouncing Time", g.getConfiguration().getBouncingtime());
              }
          } catch (GpioNotAvailableException e) {
              e.printStackTrace();
          } catch (GpioLowLevelException e) {
              e.printStackTrace();
          }
      }
  }

  
  
• Set Gpio Configuration
  

  
  package com.gmv.its.dpyjavaexamples.gpio;
  
  import java.util.List;
  import com.gmv.its.deepsy.hal.gpio.*;
  import com.gmv.its.deepsy.gpio.*;
  
  public class SetGpioConfigurationApp {
      public static void main(String[] args) {
  
          try (DeepsyGpioManager gpioManager = DeepsyGpioManager.getInstance("172.22.198.105")) {
              List<Gpio> gpioList = gpioManager.getGpios();
  
              System.out.println("There are " + gpioList.size() + " GPIOS");
              
              Gpio gpio = null;
              for (Gpio g : gpioList) {
                  if (g.getInformation().getDirection() == GpioDirection.OUTPUT) {
                      gpio = g;
                      break;
                  }
              }
              
              if (gpio != null) {
                  String currentAlias = gpio.getConfiguration().getAlias();
                  int currentDefaultValue = gpio.getConfiguration().getDefaultvalue();
                  int currentBouncingTime = gpio.getConfiguration().getBouncingtime();
                  
                  System.out.println("Initial configuration");
                  System.out.printf("%20s : %s\n", "Alias", currentAlias);
                  System.out.printf("%20s : %s\n", "Default Value", currentDefaultValue);
                  System.out.printf("%20s : %d\n", "Bouncing Time", currentBouncingTime);
  
                  GpioConfiguration configuration = gpio.getConfiguration();
                  configuration.setAlias("New Alias");
                  configuration.setDefaultvalue(1);
                  configuration.setBouncingtime(10);
                  gpio.setConfiguration(configuration);
                  
                  List<Gpio> gpioList2 = gpioManager.getGpios();
                  Gpio gpio2 = null;
                  for (Gpio g : gpioList2) {
                      if (g.getInformation().getDirection() == GpioDirection.OUTPUT) {
                          gpio2 = g;
                          break;
                      }
                  }
                  
                  System.out.println("New configuration");
                  System.out.printf("%20s : %s\n", "Alias", gpio2.getConfiguration().getAlias());
                  System.out.printf("%20s : %s\n", "Default Value", gpio2.getConfiguration().getDefaultvalue());
                  System.out.printf("%20s : %d\n", "Bouncing Time", gpio2.getConfiguration().getBouncingtime());
  
                  //Set configuration as it was
                  GpioConfiguration currentConfiguration = gpio2.getConfiguration();
                  currentConfiguration.setAlias(currentAlias);
                  currentConfiguration.setDefaultvalue(currentDefaultValue);
                  currentConfiguration.setBouncingtime(currentBouncingTime);
                  gpio2.setConfiguration(currentConfiguration);
                  
              }
          } catch (GpioNotAvailableException e) {
              e.printStackTrace();
          } catch (GpioLowLevelException e) {
              e.printStackTrace();
          }
      }
  }

  
  
• Subscribe to Gpio events
  

  
  package com.gmv.its.dpyjavaexamples.gpio;
  
  import java.util.List;
  import java.io.*;
  import com.gmv.its.deepsy.hal.CannotSubscribeException;
  import com.gmv.its.deepsy.hal.gpio.*;
  import com.gmv.its.deepsy.gpio.*;
  
  class MyGpioObserver extends GpioObserver {
      @Override
      public void notifyGpioStatus(GpioStatusEvent event) {
          String gpioid = event.getGpioid();
          GpioStatus gpioStatus = event.getStatus();
  
          System.out.printf("Status Event. Gpio %s. Value %s Counter %s\n", gpioid, gpioStatus.getValue(), gpioStatus.getCounter());
      }
      
      @Override
      public void notifyGpioConfiguration(GpioConfigurationEvent event) {
          String gpioid = event.getGpioid();
          GpioConfiguration gpioConfiguration = event.getGpioconfiguration();
  
          System.out.printf("Configuration Event. Gpio %s\n", gpioid);
          System.out.printf("%20s : %s\n", "New Alias", gpioConfiguration.getAlias());
          System.out.printf("%20s : %s\n", "New Default Value", gpioConfiguration.getDefaultvalue());
          System.out.printf("%20s : %s\n", "New Active Low", gpioConfiguration.getActivelow());
          System.out.printf("%20s : %s\n", "New Edge type", gpioConfiguration.getEdgetype());
          System.out.printf("%20s : %s\n", "New Publish", gpioConfiguration.getPublish());
          System.out.printf("%20s : %s\n", "New Bouncing Time", gpioConfiguration.getBouncingtime());
      }
  }
  
  public class SubscribeGpioEventsApp {
      public static void main(String[] args) {
  
          try (DeepsyGpioManager gpioManager = DeepsyGpioManager.getInstance("172.22.198.103")) {
              List<Gpio> gpioList = gpioManager.getGpios();
  
              System.out.println("There are " + gpioList.size() + " GPIOS");
  
              for (Gpio g : gpioList) {
                  g.subscribe(new MyGpioObserver());
              }
              
              System.out.println("Press any key for exit\n");
              InputStreamReader isr = new InputStreamReader(System.in);
              BufferedReader br = new BufferedReader(isr);
              br.readLine();
          } catch (GpioNotAvailableException e) {
              e.printStackTrace();
          } catch (GpioLowLevelException e) {
              e.printStackTrace();
          } catch (CannotSubscribeException e) {
              e.printStackTrace();
          } catch (Exception e) {
              e.printStackTrace();
          }
      }
  }

  
  
• Get Gpio value
  

  
  package com.gmv.its.dpyjavaexamples.gpio;
  
  import java.util.List;
  import com.gmv.its.deepsy.hal.gpio.*;
  import com.gmv.its.deepsy.gpio.*;
  
  public class GetGpiosValueApp {
      public static void main(String[] args) {
  
          try (DeepsyGpioManager gpioManager = DeepsyGpioManager.getInstance("172.22.198.105")) {
              List<Gpio> gpioList = gpioManager.getGpios();
  
              System.out.println("There are " + gpioList.size() + " GPIOS");
              for (Gpio g : gpioList) {
                  if (g.getInformation().getDirection() == GpioDirection.INPUT) {
                      System.out.printf("Gpio id : %s\n", g.getId());
                      System.out.printf("%20s : %s\n", "Value", g.getStatus().getValue());
                      System.out.printf("%20s : %s\n", "Counter", g.getStatus().getCounter());
                  }
              }
          } catch (GpioNotAvailableException e) {
              e.printStackTrace();
          } catch (GpioLowLevelException e) {
              e.printStackTrace();
          }
      }
  }