Perl - Industrial Digital Out 4 Bricklet¶

Simple¶

Download (example_simple.pl)

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#!/usr/bin/perl

use strict;
use Tinkerforge::IPConnection;
use Tinkerforge::BrickletIndustrialDigitalOut4;

use constant HOST => 'localhost';
use constant PORT => 4223;
use constant UID => 'XYZ'; # Change XYZ to the UID of your Industrial Digital Out 4 Bricklet

my $ipcon = Tinkerforge::IPConnection->new(); # Create IP connection
my $ido4 = Tinkerforge::BrickletIndustrialDigitalOut4->new(&UID, $ipcon); # Create device object

$ipcon->connect(&HOST, &PORT); # Connect to brickd
# Don't use device before ipcon is connected

# Set pins alternating high/low 10 times with 100ms delay
for (my $i = 0; $i < 10; $i++)
{
    select(undef, undef, undef, 0.1);
    $ido4->set_value(1 << 0);
    select(undef, undef, undef, 0.1);
    $ido4->set_value(1 << 1);
    select(undef, undef, undef, 0.1);
    $ido4->set_value(1 << 2);
    select(undef, undef, undef, 0.1);
    $ido4->set_value(1 << 3);
}

print "Press key to exit\n";
<STDIN>;
$ipcon->disconnect();

Basic Functions¶

BrickletIndustrialDigitalOut4->new($uid, $ipcon)¶

Parameters:	$uid – Type: string $ipcon – Type: IPConnection
Returns:	$industrial_digital_out_4 – Type: BrickletIndustrialDigitalOut4

Creates an object with the unique device ID $uid:

$industrial_digital_out_4 = BrickletIndustrialDigitalOut4->new("YOUR_DEVICE_UID", $ipcon);

This object can then be used after the IP Connection is connected.

BrickletIndustrialDigitalOut4->set_value($value_mask)¶

Parameters:	$value_mask – Type: int, Range: [0 to 216 - 1]
Returns:	undef

Sets the output value with a bitmask (16bit). A 1 in the bitmask means high and a 0 in the bitmask means low.

For example: The value 3 or 0b0011 will turn pins 0-1 high and the other pins low.

If no groups are used (see set_group()), the pins correspond to the markings on the Industrial Digital Out 4 Bricklet.

If groups are used, the pins correspond to the element in the group. Element 1 in the group will get pins 0-3, element 2 pins 4-7, element 3 pins 8-11 and element 4 pins 12-15.

All running monoflop timers will be aborted if this function is called.

BrickletIndustrialDigitalOut4->get_value()¶

Returns:	$value_mask – Type: int, Range: [0 to 216 - 1]

Returns the bitmask as set by set_value().

BrickletIndustrialDigitalOut4->set_selected_values($selection_mask, $value_mask)¶

Parameters:	$selection_mask – Type: int, Range: [0 to 216 - 1] $value_mask – Type: int, Range: [0 to 216 - 1]
Returns:	undef

Sets the output value with a bitmask, according to the selection mask. The bitmask is 16 bit long, true refers to high and false refers to low.

For example: The values (3, 1) or (0b0011, 0b0001) will turn pin 0 high, pin 1 low the other pins remain untouched.

If no groups are used (see set_group()), the pins correspond to the markings on the Industrial Digital Out 4 Bricklet.

If groups are used, the pins correspond to the element in the group. Element 1 in the group will get pins 0-3, element 2 pins 4-7, element 3 pins 8-11 and element 4 pins 12-15.

Running monoflop timers for the selected pins will be aborted if this function is called.

Advanced Functions¶

BrickletIndustrialDigitalOut4->set_monoflop($selection_mask, $value_mask, $time)¶

Parameters:	$selection_mask – Type: int, Range: [0 to 216 - 1] $value_mask – Type: int, Range: [0 to 216 - 1] $time – Type: int, Unit: 1 ms, Range: [0 to 232 - 1]
Returns:	undef

Configures a monoflop of the pins specified by the first parameter bitmask.

The second parameter is a bitmask with the desired value of the specified pins. A 1 in the bitmask means high and a 0 in the bitmask means low.

The third parameter indicates the time that the pins should hold the value.

If this function is called with the parameters (9, 1, 1500) or (0b1001, 0b0001, 1500): Pin 0 will get high and pin 3 will get low. In 1.5s pin 0 will get low and pin 3 will get high again.

A monoflop can be used as a fail-safe mechanism. For example: Lets assume you have a RS485 bus and a Digital Out 4 Bricklet connected to one of the slave stacks. You can now call this function every second, with a time parameter of two seconds and pin 0 high. Pin 0 will be high all the time. If now the RS485 connection is lost, then pin 0 will turn low in at most two seconds.

BrickletIndustrialDigitalOut4->get_monoflop($pin)¶

Parameters:	$pin – Type: int, Range: [0 to 15]
Return Array:	0: $value – Type: int, Range: [0 to 1] 1: $time – Type: int, Unit: 1 ms, Range: [0 to 232 - 1] 2: $time_remaining – Type: int, Unit: 1 ms, Range: [0 to 232 - 1]

Returns (for the given pin) the current value and the time as set by set_monoflop() as well as the remaining time until the value flips.

If the timer is not running currently, the remaining time will be returned as 0.

BrickletIndustrialDigitalOut4->set_group(\@group)¶

Parameters:	\@group – Type: [char, ...], Length: 4, Range: ['a' to 'd', 'n']
Returns:	undef

Sets a group of Digital Out 4 Bricklets that should work together. You can find Bricklets that can be grouped together with get_available_for_group().

The group consists of 4 elements. Element 1 in the group will get pins 0-3, element 2 pins 4-7, element 3 pins 8-11 and element 4 pins 12-15.

Each element can either be one of the ports ('a' to 'd') or 'n' if it should not be used.

For example: If you have two Digital Out 4 Bricklets connected to port A and port B respectively, you could call with ['a', 'b', 'n', 'n'].

Now the pins on the Digital Out 4 on port A are assigned to 0-3 and the pins on the Digital Out 4 on port B are assigned to 4-7. It is now possible to call set_value() and control two Bricklets at the same time.

BrickletIndustrialDigitalOut4->get_group()¶

Returns:	\@group – Type: [char, ...], Length: 4, Range: ['a' to 'd', 'n']

Returns the group as set by set_group()

BrickletIndustrialDigitalOut4->get_available_for_group()¶

Returns:	$available – Type: int, Range: [0 to 15]

Returns a bitmask of ports that are available for grouping. For example the value 5 or 0b0101 means: Port A and port C are connected to Bricklets that can be grouped together.

BrickletIndustrialDigitalOut4->get_identity()¶

Return Array:

0: $uid – Type: string, Length: up to 8 1: $connected_uid – Type: string, Length: up to 8 2: $position – Type: char, Range: ['a' to 'h', 'z'] 3: \@hardware_version – Type: [int, ...], Length: 3 0: $major – Type: int, Range: [0 to 255] 1: $minor – Type: int, Range: [0 to 255] 2: $revision – Type: int, Range: [0 to 255] 4: \@firmware_version – Type: [int, ...], Length: 3 0: $major – Type: int, Range: [0 to 255] 1: $minor – Type: int, Range: [0 to 255] 2: $revision – Type: int, Range: [0 to 255] 5: $device_identifier – Type: int, Range: [0 to 216 - 1]

Returns the UID, the UID where the Bricklet is connected to, the position, the hardware and firmware version as well as the device identifier.

The position can be 'a', 'b', 'c', 'd', 'e', 'f', 'g' or 'h' (Bricklet Port). A Bricklet connected to an Isolator Bricklet is always at position 'z'.

The device identifier numbers can be found here. There is also a constant for the device identifier of this Bricklet.

Callback Configuration Functions¶

BrickletIndustrialDigitalOut4->register_callback($callback_id, $function)¶

Parameters:	$callback_id – Type: int $function – Type: string
Returns:	undef

Registers the given $function name with the given $callback_id.

The available callback IDs with corresponding function signatures are listed below.

Callbacks¶

Callbacks can be registered to receive time critical or recurring data from the device. The registration is done with the register_callback() function of the device object. The first parameter is the callback ID and the second parameter the callback function name:

sub my_callback
{
    print "@_[0]";
}

$industrial_digital_out_4->register_callback(BrickletIndustrialDigitalOut4->CALLBACK_EXAMPLE, 'my_callback')

The callback function will be called from an internal thread of the IP Connection. In contrast to many other programming languages, variables are not automatically shared between threads in Perl. If you want to share a global variable between a callback function and the rest for your program it has to be marked as :shared. See the documentation of the threads::shared Perl module for more details.

The available constants with inherent number and type of parameters are described below.

BrickletIndustrialDigitalOut4->CALLBACK_MONOFLOP_DONE¶

Callback Parameters:	$selection_mask – Type: int, Range: [0 to 216 - 1] $value_mask – Type: int, Range: [0 to 216 - 1]

This callback is triggered whenever a monoflop timer reaches 0. The parameters contain the involved pins and the current value of the pins (the value after the monoflop).

Virtual Functions¶

Virtual functions don't communicate with the device itself, but operate only on the API bindings device object. They can be called without the corresponding IP Connection object being connected.

BrickletIndustrialDigitalOut4->get_api_version()¶

Return Array:	0: \@api_version – Type: [int, ...], Length: 3 0: $major – Type: int, Range: [0 to 255] 1: $minor – Type: int, Range: [0 to 255] 2: $revision – Type: int, Range: [0 to 255]

Returns the version of the API definition implemented by this API bindings. This is neither the release version of this API bindings nor does it tell you anything about the represented Brick or Bricklet.

BrickletIndustrialDigitalOut4->get_response_expected($function_id)¶

Parameters:	$function_id – Type: int, Range: See constants
Returns:	$response_expected – Type: bool

Returns the response expected flag for the function specified by the function ID parameter. It is true if the function is expected to send a response, false otherwise.

For getter functions this is enabled by default and cannot be disabled, because those functions will always send a response. For callback configuration functions it is enabled by default too, but can be disabled by set_response_expected(). For setter functions it is disabled by default and can be enabled.

Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is sent and errors are silently ignored, because they cannot be detected.

The following constants are available for this function:

For $function_id:

• BrickletIndustrialDigitalOut4->FUNCTION_SET_VALUE = 1
• BrickletIndustrialDigitalOut4->FUNCTION_SET_MONOFLOP = 3
• BrickletIndustrialDigitalOut4->FUNCTION_SET_GROUP = 5
• BrickletIndustrialDigitalOut4->FUNCTION_SET_SELECTED_VALUES = 9

BrickletIndustrialDigitalOut4->set_response_expected($function_id, $response_expected)¶

Parameters:	$function_id – Type: int, Range: See constants $response_expected – Type: bool
Returns:	undef

Changes the response expected flag of the function specified by the function ID parameter. This flag can only be changed for setter (default value: false) and callback configuration functions (default value: true). For getter functions it is always enabled.

Enabling the response expected flag for a setter function allows to detect timeouts and other error conditions calls of this setter as well. The device will then send a response for this purpose. If this flag is disabled for a setter function then no response is sent and errors are silently ignored, because they cannot be detected.

The following constants are available for this function:

For $function_id:

• BrickletIndustrialDigitalOut4->FUNCTION_SET_VALUE = 1
• BrickletIndustrialDigitalOut4->FUNCTION_SET_MONOFLOP = 3
• BrickletIndustrialDigitalOut4->FUNCTION_SET_GROUP = 5
• BrickletIndustrialDigitalOut4->FUNCTION_SET_SELECTED_VALUES = 9

BrickletIndustrialDigitalOut4->set_response_expected_all($response_expected)¶

Parameters:	$response_expected – Type: bool
Returns:	undef

Changes the response expected flag for all setter and callback configuration functions of this device at once.

Constants¶

BrickletIndustrialDigitalOut4->DEVICE_IDENTIFIER¶

This constant is used to identify a Industrial Digital Out 4 Bricklet.

The get_identity() function and the IPConnection->CALLBACK_ENUMERATE callback of the IP Connection have a device_identifier parameter to specify the Brick's or Bricklet's type.

BrickletIndustrialDigitalOut4->DEVICE_DISPLAY_NAME¶

This constant represents the human readable name of a Industrial Digital Out 4 Bricklet.