• Clear Serial Buffer Vb Net Worth
• Clear Serial Buffer Vb Net Promoter
• Clear Serial Buffer Vb Net Present Value
• Clear Serial Buffer Vb Net Acces

Clear Serial Buffer Vb Net Worth

Clear Serial Buffer Vb Net Promoter

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Clear Serial Buffer Vb Net Present Value

1. This method is equivalent to the following Visual Basic code: MSComm1.InBufferCount = 0. It clears the receive buffer, but does not affect the transmit buffer.
2. Just want to know how do we clear the receive buffer of my serial port in C#. Seems like the data in the receive buffer just keep accumulating. For example, the flow of incoming data is: Data A, Data B, Data C. The data I want is just Data C. I'm thinking of doing like, when I receive Data A and Data B, I do a clear buffer.

• edited 2012-11-21 - 18:01:59

  If I am not mistaken your BS2 program needs a wait command, I will dig up old posts pertaining to this and post a link as soon as I find it.
  Edit: Browse through this thread. It has pretty much everything you need for doing what you want to do,
  http://forums.parallax.com/showthread.php?96973-VB-Express-to-Stamp-Template
• edited 2012-11-21 - 18:18:07

  If I am not mistaken your BS2 program needs a wait command, I will dig up old posts pertaining to this and post a link as soon as I find it.
  Edit: Browse through this thread. It has pretty much everything you need for doing what you want to do,
  http://forums.parallax.com/showthread.php?96973-VB-Express-to-Stamp-Template

  
  While I was waiting, I actually did some searching on google and found out my problem. I was using the serialport.readline in vb.net. This reads up to the next line. So what I need to add was CR after the SEROUT message. Example: SEROUT 16, 16468, ['HELLO WORLD!', CR]. This worked.
  Here's my only problem that I need help with. Every time I write to the COM Port and send it, when it returns to the VB Program, it has the original string at the beginning of the line. Sounds confusing. Let me solve that with some code.
  Basically, I use the SerialPort.Write in VB.NET. This writes to the BS2 a number. In this case, '1', '2', or '3'. Next it will send that number multiple times with a decimal after the first two digits. When I send '1', for example, the BS2 receives that, and then sends '11.111'. But when it shows up on the vb.net program, it reads 111.111. It's keeping that first string I sent from the program. How do I clear the SerialPort on the BS2? That way the serial port is clear when I send it, therefore it only shows what I wanted it to show in the first place.
• edited 2012-11-21 - 18:21:42

  I am pretty sure that is where the RDY and WAIT commands come in to play. I modified the code from that thread and was able to get both Servos and Steppers to work using it.
  VB Code also needs the RDY command:
  This is just examples from the .doc file in that thread. You will need to modify your code accordingly. The stamp can not send and receive data simultaneously and therefor your VB program needs to tell the stamp it is ready to send/rcv and vice versa. At least, that is the way I understood it when I had similar issues.
• edited 2012-11-21 - 18:42:25

  The original VB.net program was written by Jeff, AKA unsouncode. If you can not get it figured out maybe PM him and I am sure he would be more than happy to help you out. He has helped me dramatically in the past with BS2/VB projects.
• edited 2012-11-21 - 19:41:50

  The reason you are getting what you send from the PC to the BS2 is because you are using the programming port on the BS2. The way this port is built causes it to echo everything it receives. So in reality, you are getting what you sent and the BS2's response. The only way around this would be to use two I/O pins for Tx and Rx instead of the programming port (pseudo pin 16).
• edited 2012-11-22 - 11:33:00

  I don't have time right now for a complete answer but in the mean time think about using headers to seperate your data.
  Everything with a header is read as data everthing else is discarded, including the echo
  For example
  VB looks for the 'mydata' header with ReadLine and knows the following string is valid data.
  In VB Readline looks for a string terminated with a Newline character which has a default value of 10, Carriage return has a value of 13. The default NewLine value can be modified in VB
  eg SerialPort1.NewLine=10 or SerialPort.NewLine=13
  This means the default would be SEROUT 16, 16468,
  Changing to SerialPort.NewLine=13 would mean SEROUT 16, 16468,
  Jeff T.
• edited 2012-11-27 - 12:37:43

  When you say that what you're sending to the BASIC Stamp module seems to be in your input buffer that makes complete sense. The BASIC Stamp modules have a 4.7K resistor between their SIN/SOUT lines, which causes echo. So from the VB application perspective what you send you also receive. From the BASIC Stamp module perspective this never happens because the BASIC Stamps module does not have a serial buffer and since it can perform only one task at a time, all data sent is sent before you can SERIN and see it.

Clear Serial Buffer Vb Net Acces

The device driver detects it and stops sending bytes from the 8k PC serial buffer (in main memory) to the terminal. But minicom still keeps sending out bytes for the terminal into this 8k buffer. When this 8k transmit buffer (on the first serial port) is full, minicom must stop writing to it. Minicom stops and waits. Palm z22 driver download. Why does SerialPort.DiscardInBuffer, SerialPort.DiscardOutBuffer VB.net hang up? Hello, by calling the SerialPort.DiscardInBuffer or SerialPort.DiscardOutBuffer (after Port open and not nothing) the Programm freezes and I'm at least unable to check if the module still works. Clear Buffer and Clear Screen. If you want to clear your terminal screen you can use either the 'Clear buffer' or 'Clear screen' commands. Both are located under the Edit menu. Clear screen will do just that, blank out the terminal screen, but any data received will still be preserved in the buffer. Scroll up in the window to have another look. Bmw epc download. Here we are going to access the SerialPort Class from the dot net framework using Visual Basic.net to communicate with the Hardware Serial Port.In case your PC /Laptop do not have any hardware serial ports as newer models tend to do,you can use a USB to Serial Converter like USB2SERIAL for communicating with the external device.