HAL file operation

Hi!
I need to open (close, append, read, write) file.
For example to store statistic, to collect and store some values e t c.
How can I do it in HAL? Is it possible?

OK, I tested it.
How to flush FIFO to file every second?
The problem I use "loadusr halsampler -t FILENAME" and only after the end of EMC it flush all data to file
I use new thread called sampler-thread for 1 Sec (loadrt threads name1=sampler-thread period1=1000000000.

andypugh wrote:

you need the realtime part too.

loadrt halsampler
addf halsampler sampler-thread

You also need to specify which pins you want halsampler to have, and then they need to be linked to other hal pins that you want to log.

I did it all. All works, the output in stdout or in file (if I assign it) present.
But there is one alittle problem. If I write to stdout, all other messages about the EMC also present.
If I write to file, then the file not writen at once. The EMC collect all data in cache and flush it only after the exit from EMC or if the buffer (may be 1024 bytes) becomes empty.
I need to get the stream, not buffered operation.

Here is my sample (my hal file)
#each second = 1000000000 nS
loadrt threads name1=sampler-thread period1=1000000000
loadrt sampler depth=3 cfg=ff
addf sampler.0 sampler-thread
#to file
loadusr halsampler -t A-MINMAX
net X.ferror-min <= minmax.0.min sampler.0.pin.0
net X.ferror-max <= minmax.0.max sampler.0.pin.1

I need to get the stream, not buffered operation.

Run halsampler process by hand, not from .hal file