Specifics for making a directory and files

[lecutus]

Hello to all,

To save everybody a little trouble. I'm asking this rookie question as to spare me from beating my head against the wall.

The question: what are the specifics for making a directory and accompanying files in this particular form of C. I just need a tutorial or website to go to, I can figure out the rest.

I'm trying to diagnose a problem and I need to follow the printf's within in the context of how info is being passed and processed.

I'm using Pcwhd 4.079, pic18f258.

Thanks
L.

[PCM programmer]

Always post a description of your project when you ask a question like
this. If you're writing to an SD card, then say it in your post. Also
post the file system that you want to use (FAT16, FAT32, etc.). We
don't remember what your project is about, between different threads.

[lecutus]

The project is a frac control system that is to be computer based. It is to have a laptop or pc linked to the actual truck thats doing the pumping on site.

I'm hoping to write the printf's to the computer, the embedded chip is on the truck itself. The two are linked by rs232. I'm trying to diagnose the behaviours of the chip to the truck.

As to the file system fat32 might do. I trying to write from the pc18f258 on the truck across rs232 to the controlling computer. If that's even possible.

I'm hoping it is, I'm already getting some data through the controller program I have on the computer: its own diagnostic file. This file contains a lot other information besides the pc18f258 output.

I'd like to have something similar but just for the pc18f258.

There I hope thats enuff info. If not, I'll send more.

One other question, does the version of C used by CCS differ from standard C.

L.

[asmboy]

so there is already a PC in the picture ?
well then, let the PC do what it is good at:
there is a fine fully developed file system at your command in the PC already - fast, capacious and easy to use.

Open a file on the PC, using any old serial capture program.

Then catch whatever data you want stored in the PC file system.

Use whatever Printf format your heart desires. ( hint ASCII %G, %Lu , %u %c and so on etc)

when done dumping the data - close the file on the pc

you could even have a minimal C app running on the PC and use escape sequences in the serial stream, to cause file open/create and file closure - all remotely commanded by your PIC program

and with next to NO overhead in the PIC either.

am i making sense to you Sir Lectus ?

[lecutus]

If I'm understanding correctly. Just setup a file, use standard stdio.h, open, write, and close.

Now, I have a program already monitoring and controlling the truckunit/pic chip. So since the rs232 is already open, and being used in a two way fashion already, just pass another set of info, brilliant!

As to the serial capture program, what would you suggest Mr asmboy.

Thanx

L.

[asmboy]

realterm - shareware - free to use

VERY flexible with a simple capture to file option

LOTS of config options

and works with EITHER physical 9 pin RS-232 ports if your PC has them

and virtual USB com ports alal edgeport / FTDI etc etc

type translation drivers

just google :
realterm download

and you are good to go