VB PC receives the MCU data-CodePudding

Oncomm event how to write A program, microcontroller is to measure the resistance of the potentiometer and send data in ASCII format, such as the measured resistance is 15, then send A R ASCII, A 15 ASCII, A five ASCII, potentiometer rotation Angle of 30 degrees, at this time is to send an A ASCII code, A 3 ASCII, A 0 ASCII, VB how to receive and to distinguish these data? Is to define an array, by first ASCII to differentiate between the data type and then use the data behind the CRH function into characters and deposited in the corresponding text text box code? Ask for advice

CodePudding user response:

 Option Explicit 

Private Sub Form_Load () 
With MSComm1 
. The CommPort=1 
The Settings="9600, N, 8, 1" 
. An InputMode=comInputModeText 'in character mode to accept' 
. RThreshold=3 '3 characters full of trigger OnComm news' 
. InputLen=3 read three characters' a '
. PortOpen=True 
End With 
End Sub 

Private Sub MSComm1_OnComm () 
Dim sData As String 

With MSComm1 
If the CommEvent=comEvReceive Then 
While the InBufferCount & gt;=3 
SData=https://bbs.csdn.net/topics/.Input 
The Debug. Print sData 
Wend 
End the If 
End With 
End Sub