1. Oppenheimer Technologies Rick King Jonathan Creekmore

2. Problem Current programming solutions for the Ubicom SX microcontroller are expensive. Typical costs range from $150-$240.

3. Requirements Our product must: – Program all Ubicom SX microcontrollers – Cost less than current solutions – Be manufacturable using equipment at Mississippi State University

4. The Programming Specification 17 Frames Per Word 4 Cycles Per Frame Application of 12V DC Required to Program Flash Memory

5. Hardware Design RS-232 Flash Programming Voltage In-System Programming Interface Ubicom SX-18 PC Target System

6. RS-232 Interface RS-232 Ubicom SX-18 PC

7. RS-232 The Concept Most Commonly Available Serial Communications Protocol for Computer. Transceiver Necessary to Translate Between RS-232 Voltage Levels and CMOS Levels.

8. The Hardware 22

9. Where’s the UART? A UART Converts Between Asynchronous Serial Data and Parallel Data This Function is Performed in Firmware by the SX-18 using Ubicom’s Virtual Peripheral UART.

10. Flash Programming Voltage Ubicom SX-18 Target System

11. Where, Oh Where? Where can +12V DC be generated from? – An op-amp? – Derive it from the RS-232 lines? – An IC whose single purpose is to generate a +12V signal from a +5V signal?

12. In-System Programming Interface Ubicom SX-18 Target System

13. Firmware UART Virtual Peripheral HandleCycle and HandleFrame System Control Code

14. The Programming Specification (again) 17 Frames Per Word 4 Cycles Per Frame Application of 12V DC Required to Program Flash Memory

15. Waveform Command Frames (4) Data Frames(12) The Data Word is 0x1FCE. Sync Frame

16. Hardware Costs Current Parts Cost $30.00 Possible Cost Reductions Reduce PCB Cost from $10 to $0.70 Potential Cost (1000 quantity) $15.00

17. Software Design RS-232 Data Link Layer ISP Protocol Interface PC Programming Software Programmer File Format

18. RS-232 Interface RS-232 Data Link Layer PC Programming Software Programmer

19. RS-232 Interface Implements a raw serial interface to the embedded device. Contains commands to send and receive arbitrary length strings of binary data. Test Bench: – Send text and binary strings across serial connection to a software implemented loop-back. – Status : Passed

20. DLL Interface RS-232 Data Link Layer PC Programming Software Programmer

21. DLL Interface Contains a single command to send binary data and block until the receipt of a binary response. Implements a simple checksum algorithm to aid in debugging of the communications channel.

22. DLL Interface Test Bench: – Send text and binary strings across serial connection. – Interject errors in the payload data and check for data consistency in the response. – Status : Passed

23. ISP Protocol Interface PC Programming Software

24. ISP Protocol Interface Contains the following commands:  Start Session  End Session  Erase Device  Read Device Word  Read FuseX Word  Program FuseX Word  Load Data Word  Program Data Word  Read Data Word  Increment Address

25. ISP Protocol Interface Each command is followed by a repeat count to increase the throughput of the serial communications channel. Test Bench : – Commands are sent through a test program and the responses are analyzed to determine if the correct action was taken. – Status : Passed

26. File Format Interface PC Programming Software File Format

27. File Format Interface Contains functionality to read and interpret the Intel 8-bit Merged file format. Contains functionality to interpret out-of-band information such as the Fuse and FuseX bits. Test Bench : – Compare output of the filter with the data used to generate the file. – Status : Passed

28. Screenshot

29. Future Directions All SMT Design USB Serial Interface In-System Debugging Integrated Assembler and Simulator

30. Demo Create sample program that has output noticeable to the audience. Such as a blinking LED? Modify program based on audience interaction. Such as changing the blink rate? Program test microcontroller and demonstrate with the new code.