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PIC16877A CCS how to make the program will only printf 1 time?
I wish to make the code below will only execute "printf" one time. How should I edit the code below ?
thanks
while(1 ...

Well not all USB 232 devices meet the rs232 standard. Now suppose your device doesn't (when sending chars from the PC to your rs232 level shifter)
and doesn't drive the rs232 voltage to the the specs ...

Well another piece of the puzzle is shown, you're NOT using 'normal' or 'old school' comports! Old guys like me, assume a comport to be a real UART with a DB25 or DE9 connected to it NOT a USB<-> ...

The code you have is a simple receive a char and transmit the char received (echo). This works because it is one in one out. Now as things get more complicated more in than out or the reverse you will ...

Seems like you've narrowed it down to your PC.... IF the VB program is the exact same one on both PCs(you did copy it, NOT rewrite it ?)

Though very rare, you may have blown the RS232 interface c ...

But the problem that I am facing is, I can run it perfectly in my simulation and my friend pc (win7). However, the data cannot be transmitted from pc to pic by using my pc (win XP). Have you ever seen ...

I have tried this code in real circuit and it cannot work.
I am using 4 capacitors, 1 max 232 ic, 1 pic16f877a.
When the PIC used "printf and putc" function, my computer can receive
the ...

I am using PIC 16F877A and I want to interface with pc.
How should I write the code?
Is it like this?
And the coding is correct?
What I want is when the computer sends me "1"
Then I wil ...