Input items vs Output items

Hi Marcus

Thanks for the quick answer. I didn’t know about nitems_written(0)

but I did wonder why the system didn’t already know. It’s been

a while since I used GDB but I will have a go.

I don’t quite understand - when you say "do make sure

your string isn’t going to be longer than your noutput_items" I

don’t know what that means because that’s something coming

from the scheduler isn’t it? If so how can I know beforehand what

that number is? I know a few hundred bytes that will be triggered

by the one last input bit for the packet.

I am afraid any of the tagged streams or messages are a bit

of a mystery to me.

Mike

Hi Mike,

I don?t quite understand ? when you say ?do make sure

your string isn’t going to be longer than your noutput_items? I

don?t know what that means because that?s something coming

from the scheduler isn?t it?

I was assuming you vsprintf into the output buffer, hence the
recommendation that you make not to print beyond the end of what you’re
allowed to fill.
Maybe you could share what you print where :slight_smile:

Best regards,
Marcus

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