| ??? 02/21/05 22:07 Read: times |
#88094 - Serial Comms and Visual Basic Responding to: ???'s previous message |
As I look through this thread, I notice there is no mention that you have to add the control to the form and then set up the port prior to using it. You need to open it, set the baud rate plus a whole bunch of other options.
Your setup should look something like With UserForm1.MSComm1 .CommPort=1 .Handshaking=comNone .Settings= "4800,N,8,1" .InputMode=comInputModeBinary .InputLen=1 .RThreshold=1 .DTREnable=True .RTSEnable=False End With etc. Have you done this? The best coverage of the topic I found to be in Jan Axelson's book "Serial Port Complete". I used it for the basis of two of the chapters of my book "Excel by Example : A Microsoft Excel Cookbook for Electronics Engineers". (Please forgive me if you consider this advertising- I won't go into unrelated details on the book. I am new to the forum and I am not sure of my manners yet.) The two chapters actually cover using the serial port within Excel and interfacing to electronics instrumentation, but it is in Visual Basic and the details are applicable to VB as well as VBA. I also found some good information at this URL http://www.yes-tele.com/vb.html There is also quite a bit of documentation in the VB help file although I am not sure if it shows up if the VB control is not installed. |
| Topic | Author | Date |
| 8051 <-> RS232 comunication | 01/01/70 00:00 | |
| VB to Microcontroller | 01/01/70 00:00 | |
| Very Informative! | 01/01/70 00:00 | |
| Language(s)? | 01/01/70 00:00 | |
| Languages | 01/01/70 00:00 | |
| Line buffering? | 01/01/70 00:00 | |
| furthermore Russell Bull | 01/01/70 00:00 | |
| Line buffering | 01/01/70 00:00 | |
| buffer | 01/01/70 00:00 | |
| Serial Comms and Visual Basic | 01/01/70 00:00 | |
| Another URL | 01/01/70 00:00 | |
| MSComm config | 01/01/70 00:00 | |
| More on VB setup | 01/01/70 00:00 | |
| VB Setup | 01/01/70 00:00 | |
| Code for 8051/VB | 01/01/70 00:00 | |
| Thank you | 01/01/70 00:00 | |
| MSDN | 01/01/70 00:00 | |
| Flush your buffers | 01/01/70 00:00 | |
| Stu | 01/01/70 00:00 | |
| REN ??? | 01/01/70 00:00 | |
| REN !! | 01/01/70 00:00 | |
| Hardware/software | 01/01/70 00:00 | |
| Got a MAX232 or 1488/9 chip? | 01/01/70 00:00 | |
MAX232 and oscilloscope | 01/01/70 00:00 |