mac025a-0-ws-4-e/040-b-0/wi652lv
ZIGBEE無線通信模塊
（1） 接口程序
ZIGBEE無線通信模塊通過UART1與系統芯片相連，通過此模塊完成與手持設備之間進行數據通信功能。
接口驅動主要包括兩部分：串口初始化和作為波特率發生器的定時器設置。在串口初始化之前應將C8051F120交叉開關調整到UART1使能有效，然后選擇定時器1作為UART1波特率發生器。ZIGBEE無線通信模塊IP-LINK1270 通信波特率為38400bps，必須嚴格設置定時器使UART1與IP-LINK1270波特率相同，否則無法正常數據通信。
（2） 數據傳送
數據的傳送必須滿足zlGBEE無線通信的要求，以一定的報文格式傳送，因此在傳送之前必須將數據封裝成幀，具體數據幀格式如下：
0X44代表數據格式，node為通信節點，這里默認通信節點具有相同的網絡號；0X07為ZIGBEE數據長度，這里設定為7個字節即可滿足要求；Var-parameter為閥門參數，包括讀寫命令，地址等信息，占3個字節；Var-data為閥門數據（閥位值或上下限），為占4個字節的浮點數；CRC為奇偶校驗。
（3） 與ZIGBEE無線手持設備通信
通過嵌入ZIGBEE模塊手持設備可以很方便的以無線的方式讀取閥門定位器數據，通信過程中，通信卡上ZIGBEE模塊充當服務器，數據讀取時， 通信卡發送一讀設備請求指令，通信卡ZIGBEE模塊接受指令，產生中斷響應，中斷服務程序根據手持設備請求指令返回相應的數據信息。除讀取閥門數據外，通信卡也可通過手持設備設置閥門定位器上下限以及閥門其它特性值。
mac025a-0-ws-4-e/040-b-0/wi652lv
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