chTimeNow() issue

[Pask]

hi, i have the following code:

Code: Select all

count = 0;
void function(){
if(count==0)
now=chTimeNow();
if(count==1)
now1=chTimeNow();
count++;
}

i call function() from a thread every 1000 ms and finally read through GDB global var now and now1. Why now is greater than now1?

[Giovanni]

System time is supposed to wrap back to zero after a while, probably this is what you are seeing.

Giovanni

[Pask]

Back to zero in only 1 second?
Not 2^32/CH_FREQUENCY seconds?

[Pask]

is there a way to get real system time ticks since start?
can someone give me a simple solution? pls

[Giovanni]

You should rather ask yourself, is there anything I am doing wrong?

If you read zero the 2nd time it could be an external factor clearing the variable, an overflow, a reset or something else.