開(kāi)發(fā)工具包加速亞千兆赫項(xiàng)目

　　德克薩斯儀器CC1110迷你開(kāi)發(fā)工具包是一種價(jià)格低廉、功能齊全的開(kāi)發(fā)工具包，提供了一個(gè)低功耗的sub-GHz開(kāi)始快速（868至915兆赫）的無(wú)線項(xiàng)目。

　　CC1110迷你開(kāi)發(fā)工具包（見(jiàn)圖1）是專為無(wú)線報(bào)警和安全系統(tǒng)的快速原型、工業(yè)監(jiān)控應(yīng)用中，無(wú)線傳感器網(wǎng)絡(luò)。該套件包括兩smartrfcc1110-868靶板；一個(gè)轉(zhuǎn)換板和電纜CC調(diào)試器；的評(píng)估版本ew8051 IAR嵌入式工作臺(tái)；和一個(gè)PCB天線預(yù)先ETSI和FCC標(biāo)準(zhǔn)。用戶手冊(cè)甚至建議您可以通過(guò)切換電阻器的位置來(lái)添加自己的外部天線。使用附帶的源代碼和格伯的文件，很容易將這些板轉(zhuǎn)化為現(xiàn)實(shí)世界的應(yīng)用，其中德克薩斯儀器顯然已經(jīng)認(rèn)真考慮。

　　本文將研究測(cè)試板的操作和性能，以及進(jìn)行范圍測(cè)試，這產(chǎn)生了一些令人吃驚的結(jié)果。

　　Getting Started

　　The kit comes with two boards pre-programmed with a test link that operates at 868.3 MHz using GFSK modulation at a bit rate of 2.4 kbps. The link test establishes point-to-point communication between the master and slave mode using TI‘s SimpliciTI protocol.

　　To run the link test， after powering up each board， press the master button on one board and the slave button on the other. Each board contains red and green LEDs， with the blinking pattern indicating their status. Within a few minutes of opening the box， the link test was up and running. Once the link is established， the master sends packets to the slave and waits 250 ms for acknowledgment. The slave remains in receive mode except to transmit acknowledgement packets back to the master. The whole cycle with the preprogrammed link test takes about 1.3 seconds， though the data rate， timing， and power can all be changed by recompiling the source code and reflashing the chip. TI provides the full source code for this application， which developers can easily modify using the IAR Embedded Workbench and the CC debugger， both of which are included with the kit. Reflashing requires downloading the SmartRF Flash Programmer and testing requires the SmartRF Studio. Both are free.