1. Wireless Data Acquisition System (WiDAS) Justin Peters Advisor: Professor Steven Gutschlag Senior Design Project 1

2. Outline - Background Information - Project Goals - System Parts (4) - Project Status - Future Work - Questions 2

3. Background - Important for mechanical engineers - Only Excel GUI used from legacy project 3

4. Project Goals - Intake data from various sensors with the MCU (wheel speed, engine speed, coolant temp, etc...)(100ms) - Wireless communication between two wireless boards - GUI for Excel software - GUI for the Amulet color touch-screen - Easily augmentable code (C versus Assembly) 4

5. Overall System Block Diagram 5

6. System Parts - Microcontroller SiLabs 8051F120DK 6

7. Utilization -100 MHz 8-bit processor -5 Timers -2 UARTs -8 A/D channels (12-bit) 7

8. MC1488 – TTL to RS-232 8 SiLabs UART output ---> RS-232 --->

9. Sensors SensorData TypeNotes Wheel Speed (MPH)PulsesWheel Sensor Engine Speed (RPM)PulsesIgnition Coil Coolant TemperatureVariable ResistorLogarithmic In Nature Battery VoltageVoltageDirectly From Battery Oil PressureSwitchActivated When Safe Pressure Is Not Maintained - Five more voltage sensors can easily be added 9

10. Signal Conditioning Circuitry 10

11. Software High-Level Flow Chart 11

12. System Parts – LCD Touchscreen Amulet Color Touch-screen LCD 12

13. Communication -buf_test[0] = 0xE0; // write data response -buf_test[1] = '0'; -buf_test[2] = '2'; // 1 & 2 for which byte -buf_test[3] = 'F'; -buf_test[4] = 'F'; // 3 & 4 for what value - UART_put(buf_test,1); 13

14. Touch-screen GUI 14

15. System Parts – Wireless Devices FIFO, MSK, 433 MHz, 250 kBaud 1% Packet Error per packet of 20 bytes 15

16. System Parts – WinWedge/Excel 16

17. WinWedge - Setup 17 =WinWedge|Com4!'Field(3)'

18. Project Status - All system-level specifications were met - Currently awaiting more specific sensor specs so that the WiDAS can be implemented on the SAE racecar 18

19. Future Work - Bi-directional headset communications between wireless boards - Enhanced GUI for Amulet touch-screen - Enhanced GUI for off-track laptop user 19

20. Questions? 20

21. Microcontroller – Digital Crossbar 21