The RAVA Python Driver implements the code for communicating with an RAVA Device running the RAVA Firmware.
The firmware establishes a USB CDC communication protocol with the computer host. Both Linux and Windows are equipped with generic drivers for CDC, eliminating the need for any specific driver software. This package implements the serial commands used to control the RAVA device.
The RAVA_RNG class enables the request of pulse counts, random bits, random bytes, and random numbers (integers and floats). Additionally, it establishes the circuit's basic functionality encompassing key modules such as EEPROM, PWM BOOST, heath tests, peripherals, and interfaces.
The RAVA_RNG_AIO class offers the same functionality as RAVA_RNG but within an asynchronous framework.
The RAVA_RNG_LED class implements the code for controlling the LED module within the RAVA circuit. It allows users to adjust the color and the intensity of an attached WS2812B LED.
For a deeper understanding of how the driver operates, please refer to the documentation provided within the source files and the provided examples.
The driver code is available as the rng_rava PyPI package. To install it, run:
pip install rng_rava
import rng_rava as rava
# Find the serial number of the attached RAVA devices
rava_sns = rava.find_rava_sns()
# Create a RNG instance and connect to the first device
rng = rava.RAVA_RNG()
rng.connect(serial_number=rava_sns[0])
'''
The default PWM BOOST and RNG configuration parameters are stored in the EEPROM
memory and can be accessed with rng.get_eeprom_pwm_boost() and
rng.get_eeprom_rng(). If desired, users can modify the default values using the
respective snd_ functions. Additionally, it is possible to make non-permanent
configuration changes using the following commands:
'''
# Configure PWM BOOST
rng.snd_pwm_boost_setup(freq_id=rava.D_PWM_BOOST_FREQ['50_KHZ'], duty=20)
# Configure RNG
rng.snd_rng_setup(sampling_interval_us=10)
'''
Next, the generation of various random data types is demonstrated.
'''
# Measure 100 pulse counts
pc_a, pc_b = rng.get_rng_pulse_counts(n_counts=100)
# Generate a random bit XORing both channels
bit = rng.get_rng_bits(bit_source_id=rava.D_RNG_BIT_SRC['AB_XOR'])
# Generate 100 random bytes en each channel without post-processing
bytes_a, bytes_b = rng.get_rng_bytes(n_bytes=100, postproc_id=rava.D_RNG_POSTPROC['NONE'])
# Generate 100 8-bit integers between 0 and 99
ints8 = rng.get_rng_int8s(n_ints=100, int_delta=99)
# Generate 100 16-bit integers between 0 and 9999
ints16 = rng.get_rng_int16s(n_ints=100, int_delta=9999)
# Generate 100 32-bit floats ranging between 0 and 1
floats = rng.get_rng_floats(n_floats=100)
# Close RAVA device
rng.close()
Additionally, this package contains the following submodules.
The RAVA_ACQUISITION class implements the generation of extensive datasets comprising random bytes, numbers or pulse counts extracted from a RAVA device. Generation can occur in either threaded or blocking mode, and the output can be presented as a memory array or a disk file.
For further insight, refer to the provided examples: acq_pcs.py, acq_bytes.py, acq_ints.py, and acq_floats.py.
Implements the RAVA_APP and RAVA_SUBAPP classes. The RAVA_APP is a Tk application designed to serve as a foundational framework for various Graphical User Interface (GUI) sub-applications utilizing the RAVA device.
Sub-applications are tk.Toplevel windows that integrate into the main application. Derived from the RAVA_SUBAPP class, they become part of the main application when included in the subapp_dicts argument. Once integrated, these sub-applications are easily accessible through the main application's menu and central buttons.
The Control Panel sub-app provides an GUI interface for testing the features implemented by the RAVA driver, including EEPROM, PWM, RNG, HEALTH, LED, and LAMP capabilities.
Execute it using the following command:
python3 -m rng_rava.tk.ctrlp
The Acquisition sub-app features a GUI interface for utilizing the RAVA_ACQUISITION class to generate files containing pulse counts, random bytes, or numbers.
Execute it using the following command:
python3 -m rng_rava.tk.acq
Regarding the RAVA Firmware:
- Driver versions v1.1.0 through v1.2.1 are compatible with Firmware v1.0.0
- Driver versions >= v2.0.0 are compatible with Firmware >= v2.0.0
gabrielguerrer [at] gmail [dot] com
