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[ Rhythm Reloaded ]

[ Rhythm Reloaded ]. Team 6 Progress Presentation. Team 6 Reintroduction. Ben Moes. Andy Gabler. David van Geest. Nathan Brinks. Outline. Project Reintroduction Design Norms Medical Community Surveys Microprocessor Decision Operating System Decision Challenges Progress Resources

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[ Rhythm Reloaded ]

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  1. [ Rhythm Reloaded ] Team 6 Progress Presentation

  2. Team 6 Reintroduction Ben Moes Andy Gabler David van Geest Nathan Brinks

  3. Outline • Project Reintroduction • Design Norms • Medical Community Surveys • Microprocessor Decision • Operating System Decision • Challenges • Progress • Resources • Project Feasibility • Questions

  4. Project Reintroduction • An electronic stethoscope that will: • Perform the functions of a traditional stethoscope • Record digital audio data from the patient • Reduce ambient noise • Perform frequency filtering • Store the audio files on the device • Transfer the audio files to a computer via USB • Contain these features in a convenient media-player like form-factor

  5. Technical Block Diagram

  6. Design Norms • Transparency: must be easy to use, no technical experience required • Stewardship: must protect the user, patient, and environment. RoHS, Latex Free, HIPAA • Integrity: must provide an accurate representation of the sounds produced by the body

  7. Medical Community Survey • 30 participants: 21 nurses (70%), 2 doctors (7%), 6 students (20%), and 1 Nurse Practitioner (3%) • Overall favorable response

  8. Medical Community Survey • 78% would use the device if it was purchased for them by their employer • 18% Yes, 46% Unsure, 36% No, if payment required

  9. Medical Community Survey • Average price: $150 • 47% report hearing difficulties • 20% report uncomfortable earpieces

  10. Microprocessor Decision • Main Criteria: • USB Device functionality • DSP Functionality (Hardware Multiply) • Power consumption • Clock Speed • RoHS compliance • Minor Considerations • Available memory, removable media interface, GPIO, ADC, price, dev kit

  11. Microprocessor Decision • First choice: FreescaleColdfire MCF5251 • Development Problems: • No Ethernet on dev board • File transfer rate over serial • Memory image conversion from binary to SREC • Second Choice: FreescaleColdfire MCF5275 • Onboard Ethernet • Full OS support

  12. OS Decision • Main Criteria: • Hardware Support • Open-Source Code • User Community • Documentation • Code Footprint • Familiarity to team • Price • Multi-tasking

  13. OS Decision Matrix

  14. Challenges • Microprocessor selection • Chestpiece design • Trivial File Transfer Protocol (TFTP) setup • IP ownership

  15. Progress • Received microprocessor development kit • Compiled μClinux OS kernel (1.2 MB size) • Booted the OS on the development board • Compiled HelloWorld for our processor • Ran HelloWorld under μClinux (Milestone 1) • Received and tested various microphones • Found FIR filter source code • Received sample flash, CODEC parts • Completed first draft of PPFS

  16. μClinux Screenshot

  17. Resources • Francis Andries – Andries Auscultation • Dr. Rob “The Bossman” Bossemeyer • David Dunayczan – Freescale Semiconductor • Dick Almay – Spansion • Justin Kohmescher – Analog Devices, Micron • Dr. SrinivasJanardan – Grand River Gastroenterology • David Josephson – Josephson Engineering • DornerWorks Embedded Systems Engineering • CodeSourcery • Prof. Randall Brouwer • Prof. Steven VanderLeest • uClinux-dev, uClinux-coldfire, uClinux.org, uCdot.org, CLUG

  18. Project Feasibility • Schedule • All tasks put into Microsoft Project • Focus on crucial elements: audio components, recording, filtering, chestpiece, USB interface • Less focus on mechanical design, aesthetics, FDA approval • Budget • Money spent thus far: $7.75 • Value of donated resources: $1500 • Estimated remaining expenses: $600 • Potential for further monetary support • Technical aspects proven in previous applications • Project is feasible

  19. Questions?

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