Product category:
Reference Designs
News Release from: Texas Instruments (April 2001-March 2006) | Subject: Bluetooth HFK development platform
Edited by the Electronicstalk Editorial
Team on 26 April 2004
Hands-free kit design combines Bluetooth
with DSP
Texas Instruments has developed a DSP-based hands-free kit development platform matched with a complete Bluetooth radio subsystem.
Texas Instruments has developed a hands-free kit (HFK) development platform matched with a complete Bluetooth radio subsystem The complete DSP-based platform provides real-time voice and audio-enhancing algorithms and includes a Bluetooth daughtercard to empower developers to drive high-quality, cellular handset accessories to market faster, while reducing cost
This article was originally published on Electronicstalk on 8 Nov 2004 at 8.00am (UK)
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Included in the HFK development platform is Clarity Technologies 's award winning Clear Voice Capture (CVC) echo and noise suppression software.
CVC provides "full duplex" echo suppression for natural conversation and improved voice quality when used in high noise environments like automobiles by eliminating background noise, while also improving speech recognition accuracy.
An added benefit of the HFK development platform is its automotive-class power management system for safeguarding against the noise and voltages spikes of a vehicle's 12V battery.
The HFK development platform has a separate FM transmitter so a caller's voice can be heard through the car sound system, eliminating the need for an external speaker.
Integrated algorithms enable full duplex conversation with superior noise reduction.
Additional HFK development platform features include: a dual-channel A/D convertor, cPLD and three programmable LEDs and pushbuttons.
The Bluetooth daughtercard incorporates the SIG-certified Taiyo Yuden Bluetooth module based on TI's BRF6100 single-chip Bluetooth device and Stonestreet One's Bluetopia software stack.
Ideal for mobile device manufacturers wanting to quickly and easily add Bluetooth functionality, the BRF6100 was the industry's first Bluetooth chip to use digital radio frequency (RF) technology.
Leveraging TI's patented digital RF and 0.13um process, the BRF6100 is one of the industry's smallest, most power efficient and least expensive Bluetooth solution, and the full module is only 9.8 x 9.6 x 1.65mm.
The Bluetooth software from Stonestreet One, Bluetopia, is a full-featured protocol stack including the HCI (Host Controller Interface), L2CAP (Logical Link and Adaptation Protocol), SDP (Service Discovery Protocol), RFCOMM (Radio Frequency Serial Communications Port Emulator) and OBEX (Object Exchange) functionality.
This protocol stack enables even developers new to Bluetooth to immediately begin product evaluation and development.
Bluetopia also includes the following profiles: headset, hands-free, generic access and serial port.
The Bluetooth HFK development kit integrates the hardware and software developers need, from low-level LED drivers to easy-to-use application programming interfaces (APIs) behind the complete audio and Bluetooth subsystems, to quickly develop quality, hands-free kit systems.
"Texas Instruments recognises that with the growing demand for hand-free kits, our customers want faster time to market with high performance products", said Mathew Divjak, HFK Marketing Manager, TI.
"To give our customers a competitive advantage we've brought together fully optimised audio and Bluetooth providers to create a comprehensive and open development platform targeted specifically at the hands-free market".
The HFK development platform provides a solid baseline design, so developers are able to focus on differentiating their products with advanced features rather than wasting valuable time creating system-level software from scratch.
The system-level software is available in a standard, off-the-shelf software package.
Available overhead on the TMS320C5407 DSP, the processor of the HFK, is in the range of 30MIPS, which provides sufficient headroom for implementing unique, value-added features.
In addition, the C5407 has a large internal ROM available for program storage, potentially eliminating the need for external memory.
TI also helps customers identify appropriate third parties who created optimised algorithms for such features on TI's DSPs.
Available today, the HFK development platform (TDMSHFK5407) is priced at $1495 and includes the C5407 DSP motherboard with CVC software from Clarity.
Also priced at $1495, the Bluetooth daughtercard kit (TMDSBTC) will be available in the third quarter of 2004 and includes the Bluetopia stack from Stonestreet One.
Both the development platform and daughtercard include a comprehensive board support package with Code Composer Studio (CCStudio) library examples, application notes, user guides and full schematics, which are useful for immediate development.
Royalty-free evaluation and testing licences are available for the software from Clarity and Stonestreet One.
Developers must have access to CCStudio v2.2, a JTAG emulator, amplified speaker and a microphone for implementation.
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