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[aadelgadov]

aadelgadov

aadelgadov

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• Super Hero
• Posts: 11

Hi,
Following guidelines from AT91SAM9G20 chip manual and some other posts on this forum I have been able to configure PIO registers to use PIO_B and PIO_C pins as output.  I also need to use some of them as input but after configuring them according to manual, system is not getting signals from external devices connected to the mentioned I/O pins.

I know care must be taken with shared tasks for each I/O pin.  Could you please tell us what the 40 pins for General Purpose I/O on the expansion connector J16 are, and if possible give hints to set and use them as input.

Thanks.

[admin]

admin

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• Administrator
• Super Hero
• Posts: 342

The GPIO usage of J16 is documented in the user's manual in table 9.  The function column indicates what the default usage is on the board.  GPIO lines without any comment in the function column are free to use and will not have any conflict with other usage.