Digital Telematics

Realize an On-Star vehicle communications platform with digital and analog cellular connectivity, positioning capabilities and vehicle interface, for crash notification, emergency services, stolen vehicle tracking, remote door lock/unlock, horn & lights activation, route guidance, remote diagnostics, memo recording and personal calling.

Responsibilities

• Defined the Host-DSP interface and communication protocol over an I2C bus.
• Developed the software modem functionality.
• Designed the voice recognition and keyboard interfaces.
• Participated in the system integration and Software Change Request (SCR) tracking procedure.
• Participated in design reviews.

Functional Environment

Telematics, OnStar call center simulator, Airbiquity aqLink Frequency Shift Keying (FSK) software modem, I2C

Technical Environment

C, assembly, NEC V850, TI TMS320C5509, NEC Tools (compiler, assembler, linker, simulator, emulator, debugger), NEC in-circuit emulator, Spectrum Digital JTAG emulator, TI Code Composer Studio, Borland CodeWright, Telelogic Synergy, Microsoft Visio, Microsoft NetMeeting

Innovations

• Developed a generic state machine engine to be used across control software modules.
• Incorporated a fail-safe mechanism to prevent I2C bus lock conditions in a multi-slave configuration; identified and tested the solution using an I2C analyzer.
• Limited availability of target board and cellular infrastructure at the Bangalore center: used Microsoft NetMeeting to access the development hardware at the Kokomo center.