Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

I have a problem with printf

i use a cyclone the hardware is construct and run already on my prototype if i use the instruction printf on debug mode my hardware stop to run and i can't find why have you one idea?
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

I have "similar" problems.

I amb writing a program with the Nios SDK, which consists on a bucle, and and interrupt.

The STDIO is a uart, I have system timer, and I have a cable connected.

First, I have no printfs in the bucle, and some in the interrupt (it occurs once a second, with enough time for the traces to process). I receive the interrupt 4 times and it stops (I don't know if the program stops, or only the interrupt).

If I define traces in the main bucle (a "."), when the interrupt fires it hangs (without tracing anything of the interrupt).

If I don't call any printfs, all works OK.

So this seem to show that printfs are smoeway dangerous... why? Should they?

Alex