1. Embedded Systems Design Weekly Report

2. Assignments From Last Week Team Sensors/E&M Yoshi Matt Luis Hardware Search Dave Brendan Software Dan

3. Team E&M Figure out all the E&M equations/math Determine how much power, cost, size, etc sensors require. Correlations between power, cost, frequency, etc.

4. Hardware Search Determine what processing unit to use. FPGA with or without IP Micro/DSP FPGA with external Micro/DSP

5. Software Determine the complexity of the software. This greatly effects the needed hardware. Review Ken’s code for sound card demo Get an accurate assessment of computational complexity.

6. Block Diagram

7. E&M Progress 3 unique frequencies, one for each coil. Digital pulse to “kick” each coil

8. Software Conclusions -> Hardware Implications Approximately 97 mathematical operations to determine 2D coordinates from sin amplitude/phase info. 1 exp 7 sqrts 1 divide 49 multiplies 39 adds

9. Software Assumptions -> Hardware Implications Assume at minimum 1-2 orders of magnitude more math ops for 3D. Assume maximum of 100 updates/second. Assume worst case ball park guess of 10000 assembly instructions per cycle. 5-10 MIPS processor needed.

10. ADC/DAC Info 1000:1 dynamic range on distance alone. Rotation adds at least an order of magnitude. ADC resolution of 16 bits min needed (65536)

11. Current Hardware Thoughts Blackfin (BF-531) Cheap $5, powerful (400 MHz, 800 MACS). Power hungry (40ish mA) Lack of analog peripherals/USB controller. 16 bit ARM Lots of analog peripherals Powerful More expensive 32 bit PICDSP Freescale

12. Immediate Goals for Next Week Better grasp of sensor design/cost/power consumption/correlation between all variables. Solid understanding of E&M calculation complexity. Much better grasp on software complexity/resulting hardware requirements. Select processor/order development kit by Wednesday 9/28

13. Roadmap for Next Few Weeks Create sound card prototype so that software can be developed/algorithm perfected. In parallel develop hardware prototype that talks to the PC as though it is a mouse. Sensor prototype.