Class gpio_java

java.lang.Object

gpio_java

public class gpio_java
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String[]	action Array with all allowed actions.
static java.lang.String[][]	rel_map Mapping from generic relay name to particular gpio port.

Constructor Summary

Constructors

Constructor and Description
gpio_java()

Method Summary

Modifier and Type	Method and Description
static void	checkargs(java.lang.String[] argumens) The checkargs method checks whether two correct arguments have been entered.
static void	gpio_cmdhandler(java.lang.String port, java.lang.String cmd) The gpio_cmdhandler method switches the relays on, off or returns the status.
static int	gpio_getport(java.lang.String port) The gpio_getport method searches in the rel_map variable for the correct port and return index.
static void	gpio_read_status(java.lang.String port) The method checks the status and displays it in the command line.
static void	init_gpio() The init_gpio method defines all relevant GPIO ports as output.
static java.lang.String	launchcmd(java.lang.String cmd) The launchcmd method runs the command.
static void	main(java.lang.String[] args) Implement the main function of the application gpio_java.
static void	show_usage() The show_usage method provides assistance in case of wrong input.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

rel_map

public static java.lang.String[][] rel_map

Mapping from generic relay name to particular gpio port.

action

public static java.lang.String[] action

Array with all allowed actions.

Constructor Detail

gpio_java

public gpio_java()

Method Detail

main

public static void main(java.lang.String[] args)

Implement the main function of the application gpio_java.

Parameters:

args - The passing argument in the commandline.

checkargs

public static void checkargs(java.lang.String[] argumens)

The checkargs method checks whether two correct arguments have been entered. If not, an error message appears.

Parameters:

argumens - Commandline argument

init_gpio

public static void init_gpio()

The init_gpio method defines all relevant GPIO ports as output.

gpio_getport

public static int gpio_getport(java.lang.String port)

The gpio_getport method searches in the rel_map variable for the correct port and return index.

Parameters:

port - relay(rel1-rel8)

Returns:

idx returns an index. The index allows access to the array rel_map. If an error occurs in the function, the value -1 is returned.

gpio_cmdhandler

public static void gpio_cmdhandler(java.lang.String port,
                                   java.lang.String cmd)

The gpio_cmdhandler method switches the relays on, off or returns the status.

Parameters:

port - relay(rel1-rel8)

cmd - action (on/off/status)

gpio_read_status

public static void gpio_read_status(java.lang.String port)

The method checks the status and displays it in the command line.

Parameters:

port - the relay board

show_usage

public static void show_usage()

The show_usage method provides assistance in case of wrong input.

launchcmd

public static java.lang.String launchcmd(java.lang.String cmd)

The launchcmd method runs the command.

Parameters:

cmd - a specified system command.

Returns:

retvalue returns a string