reading from serial communication port

[sfhj]

i design  program to send string value from pic16f877 to serial port and i want to read this values in labview and plot it using serial port

[AdnanZ]

Have you gone through the examples in the Example Finder (Help -> Find Examples)? Also, there are so many tutorials available on the NI website (just search for 'serial tutorial'). If you are having any issues, let us know.

[Coq_Rouge]

I have to ask, as this is a quite common beginner mistake. Do you have a proper TTL to RS232 level converter on the pic16f877 side? Like some max232 type circuit.

Message Edited by Coq Rouge on 05-22-2010 12:03 PM

[sfhj]

yes, offcourse i have

[sfhj]

but how to plot the converted signal taken in account that it is a string

i take the output of read string that is in labview example and convert it in to byte array and display it on waveform graph is that right , but it didnt give the same shape of  signal that i send it

[RavensFan]

That's a completely different question from what you started asking.  What does the string look like?  Use the appropriate string to number conversions in the string palette.

[sfhj]

its the same question i asked about converting a string to the real value of my signal and plot it thats all

is string to number will display my analog signal or there is a change 

thanks

[RavensFan]

Your question was how to read the serial port.  Now the question is how to convert the string you read to a number.  As I said, look on the string palette for string to number conversion functions.