Struct JoystickBricklet

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pub struct JoystickBricklet { /* private fields */ }

Expand description

2-axis joystick with push-button

Implementations§

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pub fn new(uid: Uid, connection: AsyncIpConnection) -> JoystickBricklet

Creates an object with the unique device ID uid. This object can then be used after the IP Connection ip_connection is connected.

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pub fn get_response_expected( &mut self, fun: JoystickBrickletFunction, ) -> Result<bool, GetResponseExpectedError>

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.

See set_response_expected for the list of function ID constants available for this function.

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pub fn set_response_expected( &mut self, fun: JoystickBrickletFunction, response_expected: bool, ) -> Result<(), SetResponseExpectedError>

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.

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pub fn set_response_expected_all(&mut self, response_expected: bool)

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

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pub fn get_api_version(&self) -> [u8; 3]

Returns the version of the API definition (major, minor, revision) 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.

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pub async fn get_position_callback_receiver( &mut self, ) -> impl Stream<Item = PositionEvent>

This receiver is triggered periodically with the period that is set by set_position_callback_period. The parameter is the position of the joystick.

The get_position_callback_receiver receiver is only triggered if the position has changed since the last triggering.

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pub async fn get_analog_value_callback_receiver( &mut self, ) -> impl Stream<Item = AnalogValueEvent>

This receiver is triggered periodically with the period that is set by [set_analog_value_callback_period]. The parameters are the analog values of the joystick.

The [get_analog_value_callback_receiver] receiver is only triggered if the values have changed since the last triggering.

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pub async fn get_position_reached_callback_receiver( &mut self, ) -> impl Stream<Item = PositionReachedEvent>

This receiver is triggered when the threshold as set by [set_position_callback_threshold] is reached. The parameters are the position of the joystick.

If the threshold keeps being reached, the receiver is triggered periodically with the period as set by [set_debounce_period].

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pub async fn get_analog_value_reached_callback_receiver( &mut self, ) -> impl Stream<Item = AnalogValueReachedEvent>

This receiver is triggered when the threshold as set by [set_analog_value_callback_threshold] is reached. The parameters are the analog values of the joystick.

If the threshold keeps being reached, the receiver is triggered periodically with the period as set by [set_debounce_period].

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pub async fn get_pressed_callback_receiver(&mut self) -> impl Stream<Item = ()>

This receiver is triggered when the button is pressed.

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pub async fn get_released_callback_receiver(&mut self) -> impl Stream<Item = ()>

This receiver is triggered when the button is released.

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pub async fn get_position(&mut self) -> Result<Position, TinkerforgeError>

Returns the position of the joystick. The middle position of the joystick is x=0, y=0. The returned values are averaged and calibrated (see [calibrate]).

If you want to get the position periodically, it is recommended to use the [get_position_callback_receiver] receiver and set the period with [set_position_callback_period].

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pub async fn is_pressed(&mut self) -> Result<bool, TinkerforgeError>

Returns true if the button is pressed and false otherwise.

It is recommended to use the [get_pressed_callback_receiver] and [get_released_callback_receiver] receivers to handle the button.

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pub async fn get_analog_value( &mut self, ) -> Result<AnalogValue, TinkerforgeError>

Returns the values as read by a 12-bit analog-to-digital converter.

§Note

The values returned by [get_position] are averaged over several samples to yield less noise, while [get_analog_value] gives back raw unfiltered analog values. The only reason to use [get_analog_value] is, if you need the full resolution of the analog-to-digital converter.

If you want the analog values periodically, it is recommended to use the [get_analog_value_callback_receiver] receiver and set the period with [set_analog_value_callback_period].

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pub async fn calibrate(&mut self) -> Result<(), TinkerforgeError>

Calibrates the middle position of the joystick. If your Joystick Bricklet does not return x=0 and y=0 in the middle position, call this function while the joystick is standing still in the middle position.

The resulting calibration will be saved on the EEPROM of the Joystick Bricklet, thus you only have to calibrate it once.

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pub async fn set_position_callback_period( &mut self, period: u32, ) -> Result<(), TinkerforgeError>

Sets the period with which the [get_position_callback_receiver] receiver is triggered periodically. A value of 0 turns the receiver off.

The [get_position_callback_receiver] receiver is only triggered if the position has changed since the last triggering.

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pub async fn get_position_callback_period( &mut self, ) -> Result<u32, TinkerforgeError>

Returns the period as set by [set_position_callback_period].

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pub async fn set_analog_value_callback_period( &mut self, period: u32, ) -> Result<(), TinkerforgeError>

Sets the period with which the [get_analog_value_callback_receiver] receiver is triggered periodically. A value of 0 turns the receiver off.

The [get_analog_value_callback_receiver] receiver is only triggered if the analog values have changed since the last triggering.

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pub async fn get_analog_value_callback_period( &mut self, ) -> Result<u32, TinkerforgeError>

Returns the period as set by [set_analog_value_callback_period].

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pub async fn set_position_callback_threshold( &mut self, option: char, min_x: i16, max_x: i16, min_y: i16, max_y: i16, ) -> Result<(), TinkerforgeError>

Sets the thresholds for the [get_position_reached_callback_receiver] receiver.

The following options are possible:

Option	Description
‘x’	Receiver is turned off
‘o’	Receiver is triggered when the position is outside the min and max values
‘i’	Receiver is triggered when the position is inside the min and max values
‘<’	Receiver is triggered when the position is smaller than the min values (max is ignored)
‘>’	Receiver is triggered when the position is greater than the min values (max is ignored)

Associated constants:

JOYSTICK_BRICKLET_THRESHOLD_OPTION_OFF
JOYSTICK_BRICKLET_THRESHOLD_OPTION_OUTSIDE
JOYSTICK_BRICKLET_THRESHOLD_OPTION_INSIDE
JOYSTICK_BRICKLET_THRESHOLD_OPTION_SMALLER
JOYSTICK_BRICKLET_THRESHOLD_OPTION_GREATER

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pub async fn get_position_callback_threshold( &mut self, ) -> Result<PositionCallbackThreshold, TinkerforgeError>

Returns the threshold as set by [set_position_callback_threshold].

Associated constants:

JOYSTICK_BRICKLET_THRESHOLD_OPTION_OFF
JOYSTICK_BRICKLET_THRESHOLD_OPTION_OUTSIDE
JOYSTICK_BRICKLET_THRESHOLD_OPTION_INSIDE
JOYSTICK_BRICKLET_THRESHOLD_OPTION_SMALLER
JOYSTICK_BRICKLET_THRESHOLD_OPTION_GREATER

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pub async fn set_analog_value_callback_threshold( &mut self, option: char, min_x: u16, max_x: u16, min_y: u16, max_y: u16, ) -> Result<(), TinkerforgeError>

Sets the thresholds for the [get_analog_value_reached_callback_receiver] receiver.

The following options are possible:

Option	Description
‘x’	Receiver is turned off
‘o’	Receiver is triggered when the analog values are outside the min and max values
‘i’	Receiver is triggered when the analog values are inside the min and max values
‘<’	Receiver is triggered when the analog values are smaller than the min values (max is ignored)
‘>’	Receiver is triggered when the analog values are greater than the min values (max is ignored)