class Tinkerforge::BrickletDistanceUSV2
Measures distance between 30cm and 500cm with ultrasound
Constants
- CALLBACK_DISTANCE
This callback is triggered periodically according to the configuration set by
BrickletDistanceUSV2#set_distance_callback_configuration
.The parameter is the same as
BrickletDistanceUSV2#get_distance
.
Public Class Methods
Creates an object with the unique device ID uid
and adds it to the IP Connection ipcon
.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 74 def initialize(uid, ipcon) super uid, ipcon, DEVICE_IDENTIFIER, DEVICE_DISPLAY_NAME @api_version = [2, 0, 0] @response_expected[FUNCTION_GET_DISTANCE] = RESPONSE_EXPECTED_ALWAYS_TRUE @response_expected[FUNCTION_SET_DISTANCE_CALLBACK_CONFIGURATION] = RESPONSE_EXPECTED_TRUE @response_expected[FUNCTION_GET_DISTANCE_CALLBACK_CONFIGURATION] = RESPONSE_EXPECTED_ALWAYS_TRUE @response_expected[FUNCTION_SET_UPDATE_RATE] = RESPONSE_EXPECTED_FALSE @response_expected[FUNCTION_GET_UPDATE_RATE] = RESPONSE_EXPECTED_ALWAYS_TRUE @response_expected[FUNCTION_SET_DISTANCE_LED_CONFIG] = RESPONSE_EXPECTED_FALSE @response_expected[FUNCTION_GET_DISTANCE_LED_CONFIG] = RESPONSE_EXPECTED_ALWAYS_TRUE @response_expected[FUNCTION_GET_SPITFP_ERROR_COUNT] = RESPONSE_EXPECTED_ALWAYS_TRUE @response_expected[FUNCTION_SET_BOOTLOADER_MODE] = RESPONSE_EXPECTED_ALWAYS_TRUE @response_expected[FUNCTION_GET_BOOTLOADER_MODE] = RESPONSE_EXPECTED_ALWAYS_TRUE @response_expected[FUNCTION_SET_WRITE_FIRMWARE_POINTER] = RESPONSE_EXPECTED_FALSE @response_expected[FUNCTION_WRITE_FIRMWARE] = RESPONSE_EXPECTED_ALWAYS_TRUE @response_expected[FUNCTION_SET_STATUS_LED_CONFIG] = RESPONSE_EXPECTED_FALSE @response_expected[FUNCTION_GET_STATUS_LED_CONFIG] = RESPONSE_EXPECTED_ALWAYS_TRUE @response_expected[FUNCTION_GET_CHIP_TEMPERATURE] = RESPONSE_EXPECTED_ALWAYS_TRUE @response_expected[FUNCTION_RESET] = RESPONSE_EXPECTED_FALSE @response_expected[FUNCTION_WRITE_UID] = RESPONSE_EXPECTED_FALSE @response_expected[FUNCTION_READ_UID] = RESPONSE_EXPECTED_ALWAYS_TRUE @response_expected[FUNCTION_GET_IDENTITY] = RESPONSE_EXPECTED_ALWAYS_TRUE @callback_formats[CALLBACK_DISTANCE] = [10, 'S'] @ipcon.add_device self end
Public Instance Methods
Returns the current bootloader mode, see BrickletDistanceUSV2#set_bootloader_mode
.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 219 def get_bootloader_mode check_validity send_request FUNCTION_GET_BOOTLOADER_MODE, [], '', 9, 'C' end
Returns the temperature as measured inside the microcontroller. The value returned is not the ambient temperature!
The temperature is only proportional to the real temperature and it has bad accuracy. Practically it is only useful as an indicator for temperature changes.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 277 def get_chip_temperature check_validity send_request FUNCTION_GET_CHIP_TEMPERATURE, [], '', 10, 's' end
Returns the distance.
If you want to get the value periodically, it is recommended to use the CALLBACK_DISTANCE
callback. You can set the callback configuration with BrickletDistanceUSV2#set_distance_callback_configuration
.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 110 def get_distance check_validity send_request FUNCTION_GET_DISTANCE, [], '', 10, 'S' end
Returns the callback configuration as set by BrickletDistanceUSV2#set_distance_callback_configuration
.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 148 def get_distance_callback_configuration check_validity send_request FUNCTION_GET_DISTANCE_CALLBACK_CONFIGURATION, [], '', 18, 'L ? k S S' end
Returns the LED configuration as set by BrickletDistanceUSV2#set_distance_led_config
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 180 def get_distance_led_config check_validity send_request FUNCTION_GET_DISTANCE_LED_CONFIG, [], '', 9, 'C' end
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 :ref:`Isolator Bricklet <isolator_bricklet>` is always at position 'z'.
The device identifier numbers can be found :ref:`here <device_identifier>`. |device_identifier_constant|
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 324 def get_identity send_request FUNCTION_GET_IDENTITY, [], '', 33, 'Z8 Z8 k C3 C3 S' end
Returns the error count for the communication between Brick and Bricklet.
The errors are divided into
-
ACK checksum errors,
-
message checksum errors,
-
framing errors and
-
overflow errors.
The errors counts are for errors that occur on the Bricklet side. All Bricks have a similar function that returns the errors on the Brick side.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 197 def get_spitfp_error_count check_validity send_request FUNCTION_GET_SPITFP_ERROR_COUNT, [], '', 24, 'L L L L' end
Returns the configuration as set by BrickletDistanceUSV2#set_status_led_config
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 265 def get_status_led_config check_validity send_request FUNCTION_GET_STATUS_LED_CONFIG, [], '', 9, 'C' end
Returns the update rate as set by BrickletDistanceUSV2#set_update_rate
.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 165 def get_update_rate check_validity send_request FUNCTION_GET_UPDATE_RATE, [], '', 9, 'C' end
Returns the current UID as an integer. Encode as Base58
to get the usual string version.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 308 def read_uid check_validity send_request FUNCTION_READ_UID, [], '', 12, 'L' end
Registers a callback with ID id
to the block block
.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 329 def register_callback(id, &block) callback = block @registered_callbacks[id] = callback end
Calling this function will reset the Bricklet. All configurations will be lost.
After a reset you have to create new device objects, calling functions on the existing ones will result in undefined behavior!
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 289 def reset check_validity send_request FUNCTION_RESET, [], '', 8, '' end
Sets the bootloader mode and returns the status after the requested mode change was instigated.
You can change from bootloader mode to firmware mode and vice versa. A change from bootloader mode to firmware mode will only take place if the entry function, device identifier and CRC are present and correct.
This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 212 def set_bootloader_mode(mode) check_validity send_request FUNCTION_SET_BOOTLOADER_MODE, [mode], 'C', 9, 'C' end
The period is the period with which the CALLBACK_DISTANCE
callback is triggered periodically. A value of 0 turns the callback off.
If the `value has to change`-parameter is set to true, the callback is only triggered after the value has changed. If the value didn't change within the period, the callback is triggered immediately on change.
If it is set to false, the callback is continuously triggered with the period, independent of the value.
It is furthermore possible to constrain the callback with thresholds.
The `option`-parameter together with min/max sets a threshold for the CALLBACK_DISTANCE
callback.
The following options are possible:
"Option", "Description" "'x'", "Threshold is turned off" "'o'", "Threshold is triggered when the value is *outside* the min and max values" "'i'", "Threshold is triggered when the value is *inside* or equal to the min and max values" "'<'", "Threshold is triggered when the value is smaller than the min value (max is ignored)" "'>'", "Threshold is triggered when the value is greater than the min value (max is ignored)"
If the option is set to 'x' (threshold turned off) the callback is triggered with the fixed period.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 141 def set_distance_callback_configuration(period, value_has_to_change, option, min, max) check_validity send_request FUNCTION_SET_DISTANCE_CALLBACK_CONFIGURATION, [period, value_has_to_change, option, min, max], 'L ? k S S', 8, '' end
Configures the distance LED to be either turned off, turned on, blink in heartbeat mode or show the distance (brighter = object is nearer).
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 173 def set_distance_led_config(config) check_validity send_request FUNCTION_SET_DISTANCE_LED_CONFIG, [config], 'C', 8, '' end
Sets the status LED configuration. By default the LED shows communication traffic between Brick and Bricklet, it flickers once for every 10 received data packets.
You can also turn the LED permanently on/off or show a heartbeat.
If the Bricklet is in bootloader mode, the LED is will show heartbeat by default.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 258 def set_status_led_config(config) check_validity send_request FUNCTION_SET_STATUS_LED_CONFIG, [config], 'C', 8, '' end
Sets the update rate to 2 Hz or 10 Hz.
With 2 Hz update rate the noise is about ±1mm, while with 10 Hz update rate the noise increases to about ±5mm.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 158 def set_update_rate(update_rate) check_validity send_request FUNCTION_SET_UPDATE_RATE, [update_rate], 'C', 8, '' end
Sets the firmware pointer for BrickletDistanceUSV2#write_firmware
. The pointer has to be increased by chunks of size 64. The data is written to flash every 4 chunks (which equals to one page of size 256).
This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 231 def set_write_firmware_pointer(pointer) check_validity send_request FUNCTION_SET_WRITE_FIRMWARE_POINTER, [pointer], 'L', 8, '' end
Writes 64 Bytes of firmware at the position as written by BrickletDistanceUSV2#set_write_firmware_pointer
before. The firmware is written to flash every 4 chunks.
You can only write firmware in bootloader mode.
This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 245 def write_firmware(data) check_validity send_request FUNCTION_WRITE_FIRMWARE, [data], 'C64', 9, 'C' end
Writes a new UID into flash. If you want to set a new UID you have to decode the Base58
encoded UID string into an integer first.
We recommend that you use Brick Viewer to change the UID.
# File lib/tinkerforge/bricklet_distance_us_v2.rb, line 300 def write_uid(uid) check_validity send_request FUNCTION_WRITE_UID, [uid], 'L', 8, '' end