1746-IO12
1746-IO12
系統(tǒng)軟件設(shè)計(jì)
4.1 ZigBee終端節(jié)點(diǎn)軟件設(shè)計(jì)
終端采集節(jié)點(diǎn)主要功能是接受來自上位機(jī)的數(shù)據(jù)采集指令后，采集電子標(biāo)簽數(shù)據(jù)信息，并將采集到的數(shù)據(jù)信息發(fā)送到協(xié)調(diào)器節(jié)點(diǎn)。首先ZigBee終端節(jié)點(diǎn)上電初始化，申請加入已組建的 ZigBee網(wǎng)絡(luò)，若加入網(wǎng)絡(luò)成功，進(jìn)入低功耗模式即休眠狀態(tài)，以降低終端節(jié)點(diǎn)功耗。等待定時中斷產(chǎn)生，ZigBee終端節(jié)點(diǎn)微處理器控制主從射頻模塊讀取電子標(biāo)簽信息，并將識別到的標(biāo)簽數(shù)據(jù)信息通過ZigBee無線模塊傳輸給ZigBee協(xié)調(diào)器節(jié)點(diǎn)，然后再通過串口RS232傳輸給上位機(jī)進(jìn)行處理。其終端采集節(jié)點(diǎn)程序流程圖如圖5所示。
圖5 ZigBee終端采集節(jié)點(diǎn)軟件流程圖
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