Arduino Micro PORTD problem

Development Tools IDE 1.x
1

I have a Micro that seems to work ok, that is until I tried using port instructions.

I set D0-D7 to OUTPUT.
My D5 pin doesn't respond when written to with PORTD = B11111111;
I back-tracked and digitalWrite(5,255) works just fine.
Is there a problem in firmware?
Did I get a Dud from Radio-Shack?
Al

2

On your arduino Micro board the chip ( 32U4 ) the arduino pin 5 maps from port C bit 6, not the D port. At least that is what the schematic drawing shows.

Edit: corrected link

Lefty

3

Lefty, I think you pasted the wrong link.

aramsdell:
Did I get a Dud from Radio-Shack?

Since digitalWrite() eventually uses the same registers you are trying to use to "write" to the ports, I don't see how it could be a "dud".

Of course as Lefty points out, digital pin 5 isn't on PORTD. It's on PORTC.

aramsdell:
Is there a problem in firmware?

What firmware?

4

This appears even more useful:

Lefty