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Wireless bi-directional data link for an EEG recording system using STM32

: Vaithianathan, T.; Zhou, H.; Hauer, J.


Institute of Electrical and Electronics Engineers -IEEE-; IEEE Instrumentation and Measurement Society:
IEEE International Symposium on Medical Measurements and Applications, MeMeA 2014. Proceedings : Lisbon, Portugal, 11 - 12 June 2014
Piscataway, NJ: IEEE, 2014
ISBN: 978-1-4799-2922-1
ISBN: 978-1-4799-2921-4
ISBN: 978-1-4799-2920-7
International Symposium on Medical Measurements and Applications (MeMeA) <9, 2014, Lisbon>
Fraunhofer IIS ()

A wireless bi-directional data link for an electroencephalogram (EEG) recording system is presented in this paper. The system is mainly composed of a prototype model of an implant and a data recorder. Both the implant and the data recorder use STM32 microcontrollers with an inbuilt radio frequency (RF) transceiver to establish a wireless link between them. The main component of the implant is a mixed-signal EEG acquisition ASIC with 8 channels. The STM32 and the ASIC of the implant module communicate via two SPI interfaces. Optimized software codes for the STM32 microcontrollers have been written to ensure a reliable wireless communication between the implant and the data recorder. A PC is connected to the data recorder which enables the communication by sending the configuration data to the implant. The data received by the data recorder is stored in a PC. The amount of input referred noise of the ASIC present in the output is estimated with the help of MATLAB.