Re: USB pins: INPUT or OUTPUT?

2011-11-15T14:41:12+02:00

Both. The USB pins are bi-directional. I think the USB code configures them anyhow, for bi-directional ports you need to change both the DDR and PORT register.

Statistics: Posted by Daid — Tue Nov 15, 2011 2:41 pm

USB pins: INPUT or OUTPUT?

2011-11-15T00:11:29+02:00

Hi all,

Code:

DDRD = ~(1 << 2);   /* all outputs except PD2 = INT0 */
DDRB = ~USBMASK;    /* set all pins as outputs except USB */

form the PowerSwitch example project
so USB is input

Code:

DDRD = 7;    /* 0000 0111 bin: all pins input except USB (-> USB reset) */

from HIDKeys example project
so USB is output

what now, input or output?

thx

Statistics: Posted by TheDude — Tue Nov 15, 2011 12:11 am

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Re: USB pins: INPUT or OUTPUT?

USB pins: INPUT or OUTPUT?