Hi all!
I have a basic question with file opening.
I would like to make use of the data accessed from i2c sensors through sysfs.
Here's the code:
fd = open(/sys/bus/i2c/.../temp2_input,O_RDONLY);
while(1) {
char[64] buf;
read(fd,buf,siezof(buf));
...
do_something
...
sleep(5);
}
The thing is I always get the same reading in each read() :(.
When I do:
# cat /sys/bus/i2c.../temp2_input
I see that the temperature is changing, but my code still displays the
same reading.
So what's the deal? Why is it cached?
Am I supposed to open() and close() the file inside 'while' loop??
What's the proper way to do it?
--
Regards
Karol Krzak
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