【正文】 +) { TxRxBuf[i]=SpiRead()。 // Read data and save to buffer } CSN=1。 nrf905_Delay(10)。 TRX_CE=1。 }//數(shù)據(jù)接收void RX(void){ SetRxMode()。 // while (CheckDR()==0)。 為了實現(xiàn)雙向通信，就不能一直處于接收等待狀態(tài)，所以注釋掉 nrf905_Delay(10)。 RxPacket()。 dot3flag=~dot3flag。}（4） 上位機Option ExplicitDim NowX As Integer 39。現(xiàn)在的X軸位置Dim MaxPlotNo As Long 39。最長的X軸范圍Dim PreValue As Single 39。前一個測量值39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。當選擇通信端口的Combo控件被選中后激活此事件39。若用戶改變通信端口時，關閉通信端口39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。Private Sub cmbCOM_Click() 39。若通信端口號碼和現(xiàn)在的選擇一樣時就不必理會，直接跳出此子程序 If + 1 = Then Exit Sub = False 39。關閉定時器 TimeDelay 100 If Then = False 39。關閉通信端口 End If = 已停止檢測并關閉通訊端口 = True 39。允許使用【打開通信端口】按鈕End Sub39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。單擊【結束】按鈕后激活此事件39。使用End命令將系統(tǒng)結束39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。Private Sub cmdEnd_Click() = False 39。關閉通信端口 EndEnd Sub39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。單擊【打開通信端口】按鈕后激活此事件39。將MSComm控件的參數(shù)設置好，并打開39。激活【開始檢測】按鈕39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。Private Sub cmdOpenCOM_Click() 39。判斷端口號碼是否落在116之間 If = 0 And = 16 Then = + 1 Else MsgBox 指定通信端口時發(fā)生錯誤！, vbCritical + vbOKOnly, 系統(tǒng)信息 Exit Sub End If 39。激活錯誤檢測機制 On Error GoTo Err = 9600,n,8,1 39。設定通信參數(shù) = True 39。打開通信端口 = False 39。將此按鈕設為禁用狀態(tài) = True 39。激活【開始檢測】按鈕 = 可單擊【開始檢測】按鈕，執(zhí)行檢測的工作。 Exit SubErr: MsgBox 打開通信端口時發(fā)生錯誤！請確定通信端口存在且正常。, vbCritical + vbOKOnly, 系統(tǒng)信息End Sub39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。單擊【開始檢測】按鈕后激活此事件39。將定時器激活或關閉，并顯示對應的文字在按鈕上，以指示用戶操作39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。Private Sub cmdStart_Click() = Not If Then = 停止檢測 Else = 開始檢測 = 已停止檢測 End IfEnd Sub39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。窗體的Load事件39。輸入圖形暫時設為灰色，表示無狀態(tài)信息進入39。將通訊端口號碼及站號填入Combo控件；并默認二者的選項是第一個39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。Private Sub Form_Load() Dim i% MaxPlotNo = 100 COM1 COM2 COM3(USB) COM4(USB) COM5 COM6 COM7 COM8 COM9 COM10 COM11 COM12 COM12 COM14 COM15 COM16 = 0 = False 39。以下設定繪圖范圍，(Xmin,YMax)(XMax,YMin) (0, 50)(MaxPlotNo, 0) = 2 39。使用兩個像素寬度的畫筆End Sub39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。定時器的Timer事件引發(fā)后，就不斷地執(zhí)行其中的程序。39。將模擬讀值命令送出，再取得返回字符串并判斷。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。39。Private Sub Timer1_Timer() Dim Buf$, ValueStr As Single, Pos1% Buf$ = Buf$ + 39。讀取變量 TimeDelay 2150 lblMsg = Now ValueStr = Val(Mid(Buf, Pos1 + 1, 7)) 39。分離出正號以后的數(shù)值 = 39。清空上一次數(shù)據(jù) = Format(ValueStr, ) amp。 ℃ 39。顯示在畫面上 If NowX = 0 Then 39。清除圖形 (0, ValueStr) 39。設定起點 Else 39。以下判斷現(xiàn)在的讀值是否大于前一次的讀值，若是，則以紅色繪線 39。若否，則以藍色繪線 39。If ValueStr PreValue + Then (NowX, ValueStr), RGB(255, 0, 0) 39。由上一次的位置畫至此點 39。Else 39。 (NowX, ValueStr), RGB(0, 0, 255) 39。由上一次的位置畫至此點 39。End If End If PreValue = ValueStr NowX = NowX + 1 39。位置加1 If NowX MaxPlotNo Then NowX = 0 39。超過范圍則數(shù)值歸零End Sub