1 / 30

Oppenheimer Technologies

Oppenheimer Technologies. Rick King Jonathan Creekmore. Problem. Current programming solutions for the Ubicom SX microcontroller are expensive. Typical costs range from $150-$240. Requirements. Our product must: Program all Ubicom SX microcontrollers Cost less than current solutions

bruis
Télécharger la présentation

Oppenheimer Technologies

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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 ProgrammingSpecification • 17 Frames Per Word • 4 Cycles Per Frame • Application of 12V DC Required to Program Flash Memory

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

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

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

  8. The Hardware 2 2 MAX233 SX18 DB9

  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 ProgrammingVoltage Ubicom SX-18 Flash Programming Voltage 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 In-System Programming Interface Target System

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

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

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

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

  18. RS-232 RS-232 Interface PC Programming Software Data Link Layer 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. RS-232 DLL Interface PC Programming Software Data Link Layer 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 ISP Protocol Interface

  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 File Format Interface PC Programming Software

  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.

More Related