writing to SD Card

[neil84]

Hi all,

I try to write a measure file to SD-CARD with labview ARM.

If I open and close file outside the while loop, the file is created but no data is writen. It works fine if I open and close file inside the loop. however, this means the file is reopened every  time. did any one knows what happens?

This is my VI:

[Gmg]

Perhaps youre overflowing the buffer somehow.  Try closing the file reference before you write 4kB of data.

As in...  Open and close the file within the while loop, but only a subset of the iterations.

[cgarel]

Hello!

I have the same type of problem so I post there.

I' try to write on a file on the SD card, and if I don't open and close the file on the loop, there's only one line writed.

Unfortunately, on my application, I have to read the measure and write them on a file quickly than 10 ms and if I open and close the file each time, writing part take too long.

Is there a tip to resolve this?

Regards,

Cédric

[Stranman]

Have you tried a master/slave loop implementation? 

The master loop reads AI, then Que's the data to a slave loop that reads the Que and records chunks of data to disk?