ELECTRONICS DESIGN
Figure 2: Under Rutronik System Solutions developed boards, like the RAB1 - Sensorfusion Board, the Adapter Board - Text To Speech, the RAB2 - CO2 or the HMS Anybus, can be stacked on the RDK2. In addition, all boards can be combined with each other, which provides even more possibilities for development
adjustment and can be used for subsequent applications.
The emergency power supply, i.e. a battery or supercapacitor, powers the integrated power management IC (PMIC). It controls the power supply for the controller and for the rest of the system (sensors and actuators or Arduino shields). Activation is via push button or the real-time clock (RTC) alarm. This enables the implementation of energy-saving solutions for applications in the industrial and automotive sectors.
The USB-C plug combined with USB power delivery capability enables more power transferring in the same period as its USB-A and USB-B predecessors. Charging times can thus be reduced significantly. As such, the RDK2 also ensures conformity with the USB-PD specification.
The CapSense technology of the PSoC62 provides high sensitivity for accurate touch response, even in noisy environments, and fast sensing times for elegant, reliable, and easy-to- use capacitive touch-sensing applications. To do so, it utilises a patented Capacitive Sigma Delta (CSD) sensing algorithm, which provides capacitive sensing through a switched capacitor technique with a delta-sigma modulator.
With the KitProg3 from Infineon, debugging is possible directly via the board without an external debugger. KitProg is a low-level communication firmware for programming and debugging PSoC microcontrollers. KitProg3 uses the industry standard CMSIS-DAP as the transport mechanism, while USB bulk endpoints provide fast communication.
Infineon provides the IDE “ModusToolbox” free of charge for programming. It includes a collection of easy-to-use software and powerful stand-alone tools, e.g. configurators.
They can be combined flexibly with any compilers, editors, debuggers, and revision control systems.
Easily expandable with Arduino adapter boards
The RDK2 is designed in the shape of a butterfly. Arduino headers are placed in the centre, to which users can plug any Arduino shields. This design not only ensures recognition value, but also high electromagnetic compatibility (EMC). Since the Arduino Shields thus have a certain distance to the baseboard, the current flow is not disturbed at high frequencies, e.g. by copper on the board.
Rutronik has already developed several such adapter boards and provides the corresponding software stacks for them. All boards have an Arduino interface and can therefore be easily combined with the RDK2, for example. This capability makes it possible to evaluate any combination of components. In addition, all components used for the boards are available on Rutronik’s line card. The Rutronik Adapter Board - Text To Speech shortens the development time for high- quality speech output. It has an integrated speech IC from Epson that can output freely definable sentences in twelve languages (e.g. French, Spanish or Mandarin) with the aid of appropriate PC software from the manufacturer. For this purpose, Rutronik has developed software with which the created text files can be loaded from the PC to the RDK2 via an operable graphical user interface (GUI). An audio amplifier and a 3.5mm jack socket can then be used to direct the sentences from the kit and output them via the loudspeaker. The Anybus NP40 network processor from HMS forms the basis for the Rutronik Adapter Board - HMS Anybus. This can be controlled serially
and output various Industrial Ethernet and fieldbus protocols. It enables the integration of optimised infrastructure components, such as switches for high-performance Ethernet. Additional ASICs and FPGAs for communication are not necessary. TwinCAT enables the implementation of EtherCAT applications. Equipped with state-of-the-art sensors from Infineon, Sensirion and Bosch, the Rutronik Adapter Board - RAB1 Sensorfusion provides a dedicated platform for evaluation and prototyping of environmental sensors and an inertial sensor. A single 3.3V supply powers the board via Arduino headers. All sensors come configured to work with the I2C interface, except for the DPS310XTSA - it can be used with either SPI or I2C. Each individual sensor can be disconnected from the power supply and I2C circuits by desoldering solder bridges. This provides the option of using only the sensors that need testing for a particular sensor fusion application.
The Rutronik Adapter Board - RAB2 for CO2 Sensing tests the most suitable CO2 sensor for an application. For this purpose, the independent sensors PASCO2V01 from Infineon and SCD41-D-R1 from Sensirion are mounted on the board. Both sensors operate on a photoacoustic measurement principle and feature a compact design. The board and the state-of-the-art components enable valid measurement and faster development of proprietary solutions, which can accelerate time to market. Of course, the RDK2 allows further combinations with other Arduino shields. However, the user must personally make the necessary software adjustments themselves.
Rutronik
www.rutronik.com DECEMBER/JANUARY 2023 | ELECTRONICS TODAY 25
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