[beagleboard] GPIO input not working

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1

Do any of the other pins work with this method?

2

From BeagleBone's manual :

*6.3.7 A/D Converters*

Seven 100K sample per second A to D converters are available on the expansion header.

*NOTE: Maximum voltage is 1.8V. Do not exceed this voltage. Voltage dividers
should be used for voltages higher than 1.8V.*

In order to use these signals, level shifters will be required. These signals connect direct
to the processor and care should be taken not to exceed this voltage.

Al 20/08/12 14:47, En/na Jack Mitchell ha escrit:

3

Hi Mitchell,
No, I tried with pins 38, 39 and 49 but none of them working

4

Hi Jordi,
Ya you are right for Analog input, but other GPIO operates with 3.3v.

5

Can you try with an already muxed pin on a different chip bank (not sure if you are referring to GPIO pin numbers, or expansion header pins above...)

Have a go with Pin 42 on the P9 Expansion header

echo 7 > /sys/class/gpio/export

echo in > /sys/class/gpio/gpio7/direction

cat /sys/class/gpio/gpio7/value

Regards,