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Memec Design Simplifies Bluetooth Development A new development kit from Memec Design lets you implement Bluetooth wireless technology on Spartan-IIE FPGAs with MicroBlaze soft processors. Embedded Bluetooth Development Kit 64 Xcell Journal Fall 2003
y Jim Beneke Director of Technical Marketing Memec jim_beneke@mei.memec.com Dennis Schlaht Director of Technical Marketing Insight Memec dennis_schlaht@ins.memec.com After several false starts, Bluetooth shorthaul wireless connectivity technology for embedded systems finally seems ready for prime time. Bluetooth technology is just now beginning to gain momentum, and we expect it to grow significantly in the coming years. For that reason, Insight Memec and Memec Design have developed an Embedded Bluetooth Development Kit featuring a Xilinx Spartan-IIE FPGA coupled with a Xilinx MicroBlaze soft-processor core. Bluetooth Basics Bluetooth technology is a frequency hopping spread spectrum (FHSS) system that operates in radio frequencies in the 2.4 GHz to 2.5 GHz ISM band, and it has a maximum data throughput of 723.2 Kbps. As with most standards, interoperability is key to success. The Bluetooth Special Interest Group’s goals include maintaining an open specification, delivering voice and data capability, and providing worldwide usability for short-range wireless solutions. The specification defines the protocols and profiles used by Bluetooth-certified products. Usage models define the real-world applications, and these usage models result in profiles as defined in the Bluetooth specification. Profiles are basically instructions for implementing usage models. The profiles assure interoperability by providing a welldefined set of higher layer procedures and uniform ways of using the lower layers of the Bluetooth protocol. The serial port profile (SPP), for example, provides basic RS- 232 serial cable emulation for Bluetooth devices. Legacy applications do not have to be modified to use Bluetooth technology; they can simply treat a Bluetooth link as a serial cable connection. RF Radio Baseband Processor Bluetooth Transceiver Adding Bluetooth capability requires the key elements shown in Figure 1. The RF radio and the baseband processor are typically available as an integrated Bluetooth transceiver solution. The transceiver chip provides a serial interface to the host processor via USB or UART ports. The host processor typically executes the upper protocol-specific functions defined by the Bluetooth standard. These protocol functions are known as the Bluetooth protocol stack and can be licensed in processor-specific binary or independent source code formats from stack providers, such as Stonestreet One. Integrated Solutions In a Windows or PocketPC-based environment, a Pentium or ARM processor actually executes the upper stack functions, which are usually included as part of some Bluetooth software applications. In an embedded application, the Bluetooth upper stack and host processor function must be accounted for in some other way, typically with an embedded core. The host processor performance requirements for supporting the Bluetooth protocol are minimal, usually less than 1 MIPS. Thus, it is very easy to add Bluetooth support to an embedded application if the host processor has processing bandwidth and a Bluetooth stack is available for the targeted processor. The 150 D-MIPS performance of the MicroBlaze soft-processor core means the additional 1 MIPS of processing overhead can often be accommodated with relative ease. The availability of the Bluetooth protocol stack presents a bigger obstacle, because the stack must be ported to the targeted embedded processor. However, with the introduction of the Memec Design Embedded Bluetooth Development Kit, this issue has been addressed for any MicroBlaze-based system. Host Processor Figure 1 – Key elements of a typical Bluetooth application Windows PC HyperTerminal Optional RS-232 P160 Bluetooth Module Spartan-IIE Board with MicroBlaze Figure 2 – Bluetooth Development Kit with wireless link The Embedded Bluetooth Kit The Memec Design kit provides all the necessary components to build and test a Bluetooth system: • An evaluation version of the Bluetooth stack ported to the MicroBlaze core • A Spartan-IIE development board • Two P160 Bluetooth modules • An evaluation version of the BTExplorer Windows application • Xilinx EDK software • Cables • Power supplies • Documentation. Figure 2 shows a typical setup of the Bluetooth kit. P160 Bluetooth Module Fall 2003 Xcell Journal 65 USB or RS-232 Windows PC BTExplorer
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ISSUE 47, FALL 2003 XCELL JOURNAL X
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EDITOR IN CHIEF Carlis Collins edit
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View from the top Innovation, Educa
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High Density Spartan-3 Support ISE
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compilation block from the XtremeDS
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Get Physical with the PALACE Synthe
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Page 15 and 16: Integration of Functions Glue Logic
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Page 33 and 34: Design Security Consider the philos
Page 35 and 36: Bitstream Encryption Simple Encrypt
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Page 45 and 46: cisely 0-1-0-1, the cell’s fitnes
Page 47 and 48: y Liza Boland System Architect, Con
Page 49 and 50: team plans to migrate to a more com
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Page 71 and 72: Take the Titanium Solution Xilinx T
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Page 78 and 79: Xilinx AllianceCORE Third-Party IP
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Page 82 and 83: Mikrokrets AS www.mikrokrets.no/ FP
Page 85 and 86: XILINX CPLD http://www.xilinx.com/p
Page 87 and 88: XILINX VIRTEX-II SERIES FPGAs http:
Page 89 and 90: XILINX SPARTAN FPGAs http://www.xil
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