create a string with serial input data

William50

I have a logging device sending serial data into the serial port. The first eight bytes of the data is a string header. After the header is sent I am storing the data that follows on a memory card.

I want to create a file on the memory card using the object "fsrw" and name the file using the string header. Is there a way to assemble the first eight ASCII header bytes into a string?

Cheers,

William

Beau Schwabe

William50,

Make the 9th byte a Zero, and use the address of the first byte as the string address pointer.

...or you could 'copy' the data bytes using bytemove into a scratch pad area and essentially do the same thing. make sure the last byte is zero, and point to the first byte as the string address.

MagIO2

Depending on the reliability of the serial connection I'd do some checks before using such a string as filename. FSRW is not limiting the filename and you can use weird names to create a file. But you are not able to read those files later on on a PC. So, I'd suggest to do at least a range check for ascii characters/numbers.

William50

Thank you for the replies.

So if I create a buffer for the filename string such as:

byte filename[8]

I point to the string by:

@filename

Do I have this correct?

MagIO2

In fact you need to create a buffer with 9 bytes because you have to set the byte after the last character of the filename to zero, which is the string-end character.

Don't forget the extension ... FILENAME.EXT ... so the buffer should in the end be 13 bytes with the dot being fixed at position [ 8 ] - hope I remember this right ;o)