We help IT Professionals succeed at work.

Changing COM Port Settings

tomerlei
tomerlei asked
on
Medium Priority
211 Views
Last Modified: 2010-04-05
Hi there,
When im using the API WriteFile/ReadFile procedures to access the com port
how can i change the baud rate to 9600 and the flow control to Xon/Xoff?
Comment
Watch Question

Commented:
var
  dcbPort:TDCB;
  hPort: THandle;
begin
    hPort := CreateFile('COM1',
                      GENERIC_READ or GENERIC_WRITE,
                      0, nil,
                      OPEN_EXISTING,
                      FILE_ATTRIBUTE_NORMAL,
                      LongInt(0));
    if hPort <> INVALID_HANDLE_VALUE then
      begin
      if GetCommState(hPort, dcbPort) then
        begin
        dcbPort.BaudRate := 9600;
        dcbPort.XoffChar := ;
        dcbPort.XonChar := ;
        SetCommState(hPort, dcbPort);
        end;
    end;
  end
end;

Not the solution you were looking for? Getting a personalized solution is easy.

Ask the Experts
Access more of Experts Exchange with a free account
Thanks for using Experts Exchange.

Create a free account to continue.

Limited access with a free account allows you to:

  • View three pieces of content (articles, solutions, posts, and videos)
  • Ask the experts questions (counted toward content limit)
  • Customize your dashboard and profile

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.