Chapter 3 Example Programs 3.1 RS-232C Example Programs Example 1 Using a setting command *Send the command in the format specified, when the conditions for the command to be acceptable are met. Private Sub Sample1_Click() '******************************************************************************* ' RS232C SAMPLE PROGRAM NO.1 '******************************************************************************* deli$ = Chr$(13) & Chr$(10) Comm1.PortOpen = True Comm1.Output = ":FUNCTION MEM" & deli$ Comm1.Output = ":CONFIGURE:TDIV 1.E-3" & deli$ Comm1.Output = ":CONFIGURE:SHOT 20" & deli$ Comm1.Output = ":TRIGGER:SOURCE OR" & deli$ Comm1.Output = ":TRIGGER:KIND CH1,LEVEL" & deli$ Comm1.Output = ":TRIGGER:PRETRIG 5" & deli$ Comm1.Output = ":TRIGGER:LEVEL CH1,2" & deli$ Comm1.Output = ":TRIGGER:SLOPE CH1,UP" & deli$ Comm1.Output = ":TRIGGER:KIND CH2,OFF" & deli$ Comm1.Output = ":TRIGGER:KIND CH3,OFF" & deli$ Comm1.Output = ":TRIGGER:KIND CH4,OFF" & deli$ Comm1.Output = ":START" & deli$ Comm1.PortOpen = False End Sub Example 2 Using a query *Send the query in the format specified, when the conditions for the query to be acceptable are met. *The response data from the query is returned in the format Private Sub Sample2_Click() '******************************************************************************* ' RS232C SAMPLE PROGRAM NO.2 '******************************************************************************* deli$ = Chr$(13) & Chr$(10) Comm1.PortOpen = True Comm1.Output = ":HEADER OFF" & deli$ Comm1.Output = ":FUNCTION?" & deli$ Do ans$ = ans$ & Comm1.Input Loop Until InStr(1, ans$, Chr$(10)) Comm1.Output = ":SYSTEM:TIME?" & deli$ Do tm$ = tm$ & Comm1.Input Loop Until InStr(1, tm$, Chr$(10)) Text1.Text = "FUNCTION = " & ans$ Text1.Text = Text1.Text & "TIME = " & tm$ Comm1.PortOpen = False End Sub Example 3 Outputting stored data *Using the :MEMORY:MAXPOINT? query, this program checks whether data can be output from memory. If this query returns zero, no data is stored, and it cannot therefore be output. *Next, the program specifies the channel and point for output, using the :MEMORY:POINT command. As data is input or output, the point is incremented automatically. If capturing data consecutively, it is sufficient to specify the point once only. *To capture data in ASCII format use the :MEMORY:ADATA? query, and to capture data as voltage values use the :MEMORY:VDATA? query. The number of data samples which may be output in one set is 1 to 80 using :ADATA? and 1 to 40 using the :VDATA? query. *Outputting data in bigger sets reduces the overall processing time. *Read data (2000 samples) for channel 1 when stored with a 20-division recording length. Private Sub Sample3_Click() '******************************************************************************* ' RS232C SAMPLE PROGRAM NO.3 '******************************************************************************* deli$ = Chr$(13) & Chr$(10) Dim d(2000) Comm1.PortOpen = True Comm1.Output = ":FUNCTION MEM" & deli$ Comm1.Output = ":CONFIGURE:SHOT 20" & deli$ Comm1.Output = ":TRIGGER:MODE SINGLE" & deli$ Comm1.Output = ":START;*OPC?" & deli$ Do o$ = o$ & Comm1.Input Loop Until InStr(1, o$, Chr$(10)) Comm1.Output = ":HEADER OFF" & deli$ Comm1.Output = ":MEMORY:MAXPOINT?" & deli$ Do mx$ = mx$ & Comm1.Input Loop Until InStr(1, mx$, Chr$(10)) If (Val(mx$) <> 2000) Then Comm1.PortOpen = False Exit Sub End If Comm1.Output = ":MEMORY:POINT CH1,0" & deli$ For i = 0 To 2000 Comm1.Output = ":MEMORY:VDATA? 1" & deli$ Do vd$ = vd$ & Comm1.Input Loop Until InStr(1, vd$, Chr$(10)) d(i) = Val(vd$) Next For i = 0 To 2000 Text1.Text = d(i) Next Comm1.PortOpen = False End Sub Example 4 Inputting storage data. *This program prepares storage memory, using the :MEMORY:PREPARE command. *Next, the program specifies the channel and point for input, using the :MEMORY:POINT command, and then uses the :MEMORY:ADATA command to input data. Private Sub Sample4_Click() '******************************************************************************* ' RS232C SAMPLE PROGRAM NO.4 '******************************************************************************* deli$ = Chr$(13) & Chr$(10) Comm1.PortOpen = True Comm1.Output = ":FUNCTION MEM" & deli$ Comm1.Output = ":CONFIGURE:SHOT 20" & deli$ Comm1.Output = ":MEMORY:PREPARE;*OPC?" & deli$ Do o$ = Comm1.Input Loop Until InStr(1, o$, Chr$(10)) Comm1.Output = ":MEMORY:POINT CH1,0" & deli$ For i = 0 To 2000 Comm1.Output = ":MEMORY:ADATA " & Ltrim(Str$(Int(500 * Sin(3.14 * i / 500)))) & deli$ Next Comm1.PortOpen = False End Sub Example 5 Checking the presence of input channel, and displaying the input ranges on the screen. Private Sub Sample5_Click() '******************************************************************************* ' RS232C SAMPLE PROGRAM NO.5 '******************************************************************************* deli$ = Chr$(13) & Chr$(10) Comm1.PortOpen = True Comm1.Output = ":HEADER OFF" & deli$ Comm1.Output = "*OPT?" & deli$ Do op$ = op$ & Comm1.Input Loop Until InStr(1, op$, Chr$(10)) ch1% = Val(Mid$(op$, 1, 1)) ch2% = Val(Mid$(op$, 3, 1)) ch3% = Val(Mid$(op$, 5, 1)) ch4% = Val(Mid$(op$, 7, 1)) Comm1.Output = ":MEMORY:GETREAL"& deli$ If (ch1% <> 0) Then Comm1.Output = ":MEMORY:AREL? CH1" & deli$ ar$ = "" Do ar$ = ar$ & Comm1.Input Loop Until InStr(1, ar$, Chr$(10)) ch1_data$ = "CH1 = " & ar$ Else ch1_data$ = "CH1 = NON" End If If (ch2% <> 0) Then Comm1.Output = ":MEMORY:AREL? CH2" & deli$ ar$ = "" Do ar$ = ar$ & Comm1.Input Loop Until InStr(1, ar$, Chr$(10)) ch2_data$ = "CH2 = " & ar$ Else ch2_data$ = "CH2 = NON" End If If (ch3% <> 0) Then Comm1.Output = ":MEMORY:AREL? CH3" & deli$ ar$ = "" Do ar$ = ar$ & Comm1.Input Loop Until InStr(1, ar$, Chr$(10)) ch3_data$ = "CH3 = " & ar$ Else ch3_data$ = "CH3 = NON" End If If (ch4% <> 0) Then Comm1.Output = ":MEMORY:AREL? CH4" & deli$ ar$ = "" Do ar$ = ar$ & Comm1.Input Loop Until InStr(1, ar$, Chr$(10)) ch4_data$ = "CH4 = " & ar$ Else ch4_data$ = "CH4 = NON" End If Text1.Text = ch1_data$ & deli$ & ch2_data$ & deli$ & ch3_data$ & deli$ & ch4_data$ & deli$ Comm1.PortOpen = False End Sub Example 6 Saving stored data onto drive A Private Sub Sample6_Click() '******************************************************************************* ' RS232C SAMPLE PROGRAM NO.6 '******************************************************************************* deli$ = Chr$(13) & Chr$(10) na$ = "a:\sample.dat" Comm1.PortOpen = True Comm1.Output = ":HEADER OFF" & deli$ Comm1.Output = ":MEMORY:MAXPOINT?" & deli$ Do mx$ = mx$ & Comm1.Input Loop Until InStr(1, mx$, Chr$(10)) If (Val(mx$) = 0) Then Comm1.PortOpen = False Exit Sub End If Open na$ For Output As #1 Comm1.Output = ":MEMORY:POINT CH1,0" & deli$ Print #1, 10 For i = 0 To 10 Comm1.Output = ":MEMORY:ADATA? 1" & deli$ ad$ = "" Do ad$ = ad$ & Comm1.Input Loop Until InStr(1, ad$, Chr$(10)) Print #1, Val(ad$) Next Close #1 Comm1.PortOpen = False End Sub Example 7 Reading the data saved in Example 6, and loading it into the unit. Private Sub Sample7_Click() '******************************************************************************* ' RS232C SAMPLE PROGRAM NO.7 '******************************************************************************* deli$ = Chr$(13) & Chr$(10) na$ = "a:\sample.dat" Comm1.PortOpen = True Comm1.Output = ":HEADER OFF" & deli$ Comm1.Output = ":MEMORY:PREPARE" & deli$ Do o$ = Comm1.Input Loop Until InStr(1, o$, Chr$(10)) Open na$ For Output As #1 Comm1.Output = ":MEMORY:POINT CH1,0" & deli$ Input #1, mx For i = 0 To mx Input #1, dt Comm1.Output = ":MEMORY:ADATA " & Str$(dt) & deli$ Next Close #1 Comm1.PortOpen = False End SubDownload Driver Pack
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