Serial output from CapSense example in Chapter08 is garbage about avr-programming HOT 2 CLOSED

That's hilarious. (Or as hilarious as a horrible bug can be...) I just ran into this problem myself a couple days ago.

What's happening is that the compiler builds up the serial library, you change the processor speed, and the compiler doesn't re-build the serial functions again to match the new speed. This glitch crept in when I switched over to a (better? more general-purpose?) version of the Makefile.

The quick fix is to delete any old copies of USART.o. In particular, if you're using the stock setup, it should be in the AVR-Programming/AVR-Programming-Library/ directory unless you've moved it anywhere else.

Delete USART.o and recompile. It will make it with the right F_CPU value (in the Makefile) and you'll be good to go. You'll probably have to delete it again if you switch back to a low-speed program. Sigh.

I'll fix up the Makefile too, which'll squish the bug for real.

Thanks for catching this!

from avr-programming.

Hi Elliot

Awesome, that was fast man! It works :-D Thank you very, very much man!!
I'm so happy to see this self made touch sensor working :-)
Now I'll have a beer.

I wish you and your family a very nice christmas and also the best for
2016!! And good luck with your next projects!!

Greetings from the Saarland
Boris

2015-12-20 23:18 GMT+01:00 Elliot Williams [email protected]:

That's hilarious. (Or as hilarious as a horrible bug can be...) I just ran
into this problem myself a couple days ago.

What's happening is that the compiler builds up the serial library, you
change the processor speed, and the compiler doesn't re-build the serial
functions again to match the new speed. This glitch crept in when I
switched over to a (better? more general-purpose?) version of the Makefile.

The quick fix is to delete any old copies of USART.o. In particular, if
you're using the stock setup, it should be in the
AVR-Programming/AVR-Programming-Library/ directory unless you've moved it
anywhere else.

Delete USART.o and recompile. It will make it with the right F_CPU value
(in the Makefile) and you'll be good to go. You'll probably have to delete
it again if you switch back to a low-speed program. Sigh.

I'll fix up the Makefile too, which'll squish the bug for real.

Thanks for catching this!

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