Hayden123

I am trying to create GUI to work with the interigation of Microprocessor with a LCD readout. The processor does not have a buffer so it can only handle one character at a time. I could use some help writing a statement that would separate the characters Sent with about a 1000 of a sec pause.

BugMan

Quote:

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Originally Posted by Hayden123
I am trying to create GUI to work with the interigation of Microprocessor with a LCD readout. The processor does not have a buffer so it can only handle one character at a time. I could use some help writing a statement that would separate the characters Sent with about a 1000 of a sec pause.

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There are many other posts that address this issue. After reading, if you have additional questions then it may be beneficial to give the details (model#s) of the processor and/or the emulator kit/board. I have several different processors and emulation boards and it would help to know with which you are referring to.

BillSoo

So you wish to send characters to your microprocessor one at a time with a 1ms delay between each char.

It's easy enough to put in a delay; just use the QueryPerformanceCounter API (see my tutorial on "A brief history of Time and Date" in Tutors Corner)....

One possible problem lies with the nature of windows communication routines. As I understand it, windows *may* buffer any data you send via the API (the mscomm control is just a wrapper for the API) and then blow it out the port in one go. This is not good for you....

*IF* this is the case, then you will need to send the characters out the port yourself without using windows API. The way to do this is to use the INP and OUT commands from the INPOUT32.DLL module (check the FAQ at the top of the communications forum) to send data directly to the port address.

It may be that mscomm will work for you, if so, great. But if it doesn't, then try the inpout32.dll method.