Serial communication with HEX

[willstuck]

Hello,

I am having major problems communicating with a device I have connected to my computers com port. I wish to send a HEX value to the serial port. I am using Visual C++ 6 and don't have any idea how to even open the port. Please, any advice would be appreciated. Will.

 

[Guest_imported]

what are you trying to control a toaster !?!
Try plugin it in!

 

[Guest_imported]

If you want to open the port try turning the handle!

 

[MKuiper]

You need the API's to do this:
- CreateFile to open the port, like CreateFile ( "COM1:", GENERIC_READ | GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, NULL ); The OPEN_EXISTING is important, other options for a comm-port will cause CreateFile to fail.
- ReadFile to receive data
- WriteFile to send data
- CloseHandle to close the port
- Some functions for confguration and error handling, like SetCommState, ClearCommError and others. They are all in the Platform SDK documentation. Marcel

 

[xwb]

Make sure you have a cross over cable if you are going from PC to PC. Also have a look at

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnfiles/html/msdn_serial.asp