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[on:]

Can we put the "UCSRB = 0;" info for disabling the serial port into the reference docs? I had a few students who were having trouble with this...

thanks

D

[Reply #1 on:]

Maybe it's better to add a Serial.end() function that does the same thing?  And making pins 0 and 1 available as digital i/o if Serial.begin() hasn't been called?

[Reply #2 on:]

we couldn't get pin 0 and/or 1 to act as regular I/O, without any serial commands at all. As soon as we put the "UCSRB=0" line in, they magically came to life, or at least they could be addressed with digitalWrite()... but maybe we're doing something wrong?

[Reply #3 on:]

You're not doing anything wrong.  But we could have the Arduino core automatically disconnect the serial connection from pins 0 and 1 (so you can use them as regular digital i/o) when your sketch starts (since the bootloader was using the serial connection, the pins are, I think, already configured that way).  That is, I should put UCSRB=0; into main() before the call to setup().

[Reply #4 on:]

sorry, but this doesn't work for me.
when i add UCRSB = 0; in setup() i get an error message. the same is true also for Serial.end ()
please tell what to do to activate pin 0 and 1 so digitalWrite may work!!!!!!
thanks for your help.

[Reply #5 on:]

You wil get an error if the UCSRB = 0; statement isn't inside of void setup().

You have it mistyped in your post, check that it's correct in your code. You've got
UCRSB = 0;

which should actuallly be
UCSRB = 0;

In Arudino 7 it is implemented by default-- i.e. the digital pins on 0 and 1 are available without the above command.
D

[Reply #6 on:]

i downloaded version 7.
now pins 0 and 1 work like a charm!
thanks.