Ishraq Ibne Ashraf
and 1 contributors

NAME

Tinkerforge::BrickletIO4 - 4-channel digital input/output

CONSTANTS

DEVICE_IDENTIFIER

This constant is used to identify a IO-4 Bricklet.

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

DEVICE_DISPLAY_NAME

This constant represents the display name of a IO-4 Bricklet.

CALLBACK_INTERRUPT

This constant is used with the register_callback() subroutine to specify the CALLBACK_INTERRUPT callback.

CALLBACK_MONOFLOP_DONE

This constant is used with the register_callback() subroutine to specify the CALLBACK_MONOFLOP_DONE callback.

FUNCTION_SET_VALUE

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_GET_VALUE

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_SET_CONFIGURATION

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_GET_CONFIGURATION

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_SET_DEBOUNCE_PERIOD

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_GET_DEBOUNCE_PERIOD

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_SET_INTERRUPT

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_GET_INTERRUPT

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_SET_MONOFLOP

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_GET_MONOFLOP

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_SET_SELECTED_VALUES

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_GET_EDGE_COUNT

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_SET_EDGE_COUNT_CONFIG

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_GET_EDGE_COUNT_CONFIG

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTION_GET_IDENTITY

This constant is used with the get_response_expected(), set_response_expected() and set_response_expected_all() subroutines.

FUNCTIONS

new()

Creates an object with the unique device ID *uid* and adds it to the IP Connection *ipcon*.

set_value()

Sets the output value (high or low) with a bitmask (4bit). A 1 in the bitmask means high and a 0 in the bitmask means low.

For example: The value 3 or 0b0011 will turn the pins 0-1 high and the pins 2-3 low.

.. note:: This function does nothing for pins that are configured as input. Pull-up resistors can be switched on with :func:`Set Configuration`.

get_value()

Returns a bitmask of the values that are currently measured. This function works if the pin is configured to input as well as if it is configured to output.

set_configuration()

Configures the value and direction of the specified pins. Possible directions are 'i' and 'o' for input and output.

If the direction is configured as output, the value is either high or low (set as *true* or *false*).

If the direction is configured as input, the value is either pull-up or default (set as *true* or *false*).

For example:

* (15, 'i', true) or (0b1111, 'i', true) will set all pins of as input pull-up. * (8, 'i', false) or (0b1000, 'i', false) will set pin 3 of as input default (floating if nothing is connected). * (3, 'o', false) or (0b0011, 'o', false) will set pins 0 and 1 as output low. * (4, 'o', true) or (0b0100, 'o', true) will set pin 2 of as output high.

The default configuration is input with pull-up.

get_configuration()

Returns a value bitmask and a direction bitmask. A 1 in the direction bitmask means input and a 0 in the bitmask means output.

For example: A return value of (3, 5) or (0b0011, 0b0101) for direction and value means that:

* pin 0 is configured as input pull-up, * pin 1 is configured as input default, * pin 2 is configured as output high and * pin 3 is are configured as output low.

set_debounce_period()

Sets the debounce period of the :cb:`Interrupt` callback in ms.

For example: If you set this value to 100, you will get the interrupt maximal every 100ms. This is necessary if something that bounces is connected to the IO-4 Bricklet, such as a button.

The default value is 100.

get_debounce_period()

Returns the debounce period as set by :func:`Set Debounce Period`.

set_interrupt()

Sets the pins on which an interrupt is activated with a bitmask. Interrupts are triggered on changes of the voltage level of the pin, i.e. changes from high to low and low to high.

For example: An interrupt bitmask of 10 or 0b1010 will enable the interrupt for pins 1 and 3.

The interrupt is delivered with the :cb:`Interrupt` callback.

get_interrupt()

Returns the interrupt bitmask as set by :func:`Set Interrupt`.

set_monoflop()

Configures a monoflop of the pins specified by the first parameter as 4 bit long bitmask. The specified pins must be configured for output. Non-output pins will be ignored.

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

The third parameter indicates the time (in ms) 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 an IO-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 set to high. Pin 0 will be high all the time. If now the RS485 connection is lost, then pin 0 will get low in at most two seconds.

get_monoflop()

Returns (for the given pin) the current value and the time as set by :func:`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.

set_selected_values()

Sets the output value (high or low) with a bitmask, according to the selection mask. The bitmask is 4 bit long, *true* refers to high and *false* refers to low.

For example: The parameters (9, 4) or (0b0110, 0b0100) will turn pin 1 low and pin 2 high, pin 0 and 3 will remain untouched.

.. note:: This function does nothing for pins that are configured as input. Pull-up resistors can be switched on with :func:`Set Configuration`.

get_edge_count()

Returns the current value of the edge counter for the selected pin. You can configure the edges that are counted with :func:`Set Edge Count Config`.

If you set the reset counter to *true*, the count is set back to 0 directly after it is read.

.. versionadded:: 2.0.1$nbsp;(Plugin)

set_edge_count_config()

Configures the edge counter for the selected pins.

The edge type parameter configures if rising edges, falling edges or both are counted if the pin is configured for input. Possible edge types are:

* 0 = rising (default) * 1 = falling * 2 = both

The debounce time is given in ms.

Configuring an edge counter resets its value to 0.

If you don't know what any of this means, just leave it at default. The default configuration is very likely OK for you.

Default values: 0 (edge type) and 100ms (debounce time)

.. versionadded:: 2.0.1$nbsp;(Plugin)

get_edge_count_config()

Returns the edge type and debounce time for the selected pin as set by :func:`Set Edge Count Config`.

.. versionadded:: 2.0.1$nbsp;(Plugin)

get_identity()

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' or 'd'.

The device identifier numbers can be found :ref:`here <device_identifier>`. |device_identifier_constant|