Making development easier for low-power wireless systems, Texas Instruments recently released a new tool for designing embedded systems that combines ultra-low-power MSP430 microcontrollers (MCU) with wireless communications. The new eZ430-RF2500 development tool, packaged in a convenient USB stick form-factor, offers two RF-enabled microcontroller target boards and a PC debugging interface that may be used to develop standalone wireless projects. Developers are expected to find it easier than ever to build low-power wireless systems for sensing and metering, home security and automation, medical and other innovative applications.
The eZ430-RF2500 provides all the hardware and software needed to program the MSP430 MCU and the Low-Power RF 2,4 GHz transceiver on the postage stamp-sized target board. The kit provides a complete solution for writing code as well as operating and testing the application in the field.
The USB stick development interface plugs into a PC port with no additional driver software, and then connects directly to an MCU-RF target board. Two target boards are included in the kit, providing the developer with the essentials of a wireless network. A battery pack, also included in the kit, enables a target board to operate as a standalone system, and standard through-hole pin connectors make it easy for external components or existing systems to attach to the target board. Features of the target board include two programmable LEDs to display activity, a programmable toggle button for interface and an integrated zero-power brownout detector that resets the MSP430 when power drops.
An MSP430F2274 MCU and a CC2500 RF transceiver are integrated in the target board. The MCU, based on a 16-bit RISC architecture, can handle generous amounts of code and data with its 32 KBytes of flash memory and 1 KByte of RAM. The MSP430F2274 also features high performance, integrated analog such as a 12-channel 10-bit analog-to-digital converter (ADC) that samples at up to 200 kilosamples per second. Other on-chip peripherals include two operational amplifiers and support for UART, SPI, I²C and IrDA communications. The MCU offers five low-power modes for maximum power efficiency and features an ultra-fast wake-up from standby mode in less than one microsecond. The CC2500 is a highly-integrated multichannel RF transceiver designed for low-power wireless applications in the 2,4 GHz Industrial Scientific Medical (ISM) band. It has an automated packet engine and supports data rates from 1,2 to 500 Kbps.
The kit comes with all the software needed to program wireless MSP430 applications, and the USB development interface provides the required hardware for emulation and debugging on the target board. The user can choose either the IAR Embedded Workbench IDE or TI's Code Composer Studio Essentials IDE to write and download code, then debug the application at full speed using hardware breakpoints and single stepping, consuming no extra hardware resources. The kit's software includes a protocol stack for low-power RF networks and hardware abstraction layers (HAL) enabling the rapid design and prototyping of wireless systems. In addition, the kit includes a complete example project, measuring temperature and voltage through a wireless sensor network. Full documentation for the tool and software is also included.
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