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Microsoft Comm Control
- Thread starter cdelaney
- Start date
cdelaney,<br>
Change the comInputMode to the 'binary' (in the Properties listbox, it's called something else but you'll get the picture). Read into a Byte. What do you want to display in the textbox? The visual representation of the byte value, such as you'd see in a dump from dos's debug or Norton's disk editor? Or just the ascii value of the byte?<br>
--Jim
Change the comInputMode to the 'binary' (in the Properties listbox, it's called something else but you'll get the picture). Read into a Byte. What do you want to display in the textbox? The visual representation of the byte value, such as you'd see in a dump from dos's debug or Norton's disk editor? Or just the ascii value of the byte?<br>
--Jim
- Thread starter
- #3
I have already changed the value in MSCOMM to input binary but I want to be able to show the actual contents of the byte for example if the byte that came in was 01010101 I would like to show it as this or if not at least be able to convert it to hex so I can easily work with it.
cdelany,<br>
Here is an example--The oncomm event, and a function to parse/display the bytes as you want-(-admittedly theres little error control, but you can do that as you like)<br>
Private Sub MSComm2_OnComm()<br>
If Me!MSComm2.CommEvent = 2 Then<br>
Dim vr As Variant, bt As Byte<br>
vr = Me!MSComm2.Input<br>
On Error Resume Next<br>
For i = 0 To 1024 'or whatever input buff is<br>
Debug.Print vr(i)<br>
If Err = 9 Then Exit For 'subscript out of range--not sure how to get ubound of vr<br>
bt = vr(i)<br>
Me!Text2.Text = Me!Text2.Text & BitField(bt)<br>
Next i<br>
End If<br>
End Sub<br>
<br>
Function BitField(bt As Byte) As String<br>
Dim j As Integer, i As Integer, strBitField As String<br>
j = 1<br>
strBitField = "00000000" 'init<br>
For i = 1 To 8<br>
Mid$(strBitField, i, 1) = IIf(bt And j, "1", "0"
<br>
j = j * 2 'Increment AND mask<br>
Next i<br>
BitField = strBitField<br>
End Function<br>
<br>
<br>
I don't know how much experience you have with comm, I've got moderate, so as a caveat, you need to keep an eye on the Recieve threshold and input len, etc. I typically set both to 1 (if text mode) so my oncomm is always guaranteed to have 1 char, in binary mode, I'm not sure what's the best<br>
--Jim
Here is an example--The oncomm event, and a function to parse/display the bytes as you want-(-admittedly theres little error control, but you can do that as you like)<br>
Private Sub MSComm2_OnComm()<br>
If Me!MSComm2.CommEvent = 2 Then<br>
Dim vr As Variant, bt As Byte<br>
vr = Me!MSComm2.Input<br>
On Error Resume Next<br>
For i = 0 To 1024 'or whatever input buff is<br>
Debug.Print vr(i)<br>
If Err = 9 Then Exit For 'subscript out of range--not sure how to get ubound of vr<br>
bt = vr(i)<br>
Me!Text2.Text = Me!Text2.Text & BitField(bt)<br>
Next i<br>
End If<br>
End Sub<br>
<br>
Function BitField(bt As Byte) As String<br>
Dim j As Integer, i As Integer, strBitField As String<br>
j = 1<br>
strBitField = "00000000" 'init<br>
For i = 1 To 8<br>
Mid$(strBitField, i, 1) = IIf(bt And j, "1", "0"
<br>j = j * 2 'Increment AND mask<br>
Next i<br>
BitField = strBitField<br>
End Function<br>
<br>
<br>
I don't know how much experience you have with comm, I've got moderate, so as a caveat, you need to keep an eye on the Recieve threshold and input len, etc. I typically set both to 1 (if text mode) so my oncomm is always guaranteed to have 1 char, in binary mode, I'm not sure what's the best<br>
--Jim
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