Bureaucrats, dave_user, Administrators
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==Peripheral GPIOs ==
In [[ETRA_SOM | ETRA SOM]] there is an I2C I/O Expander: in this way, ETRA can handle external several pins in many different ways and most of them can be configured as GPIOs. When a pin is set as a GPIO, it is possibleto read its value, change its direction or change output value directly from the shellThese GPIOs are available in J11 connector.
==== Usage with i2c command =Accessing the peripheral ===
==== Usage with I2C command ==== Set all GPIO on output mode, all pin pins low:
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root@desk-mp1:~# i2cset -y 1 0x34 0x2a 0xff
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Read input value:
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[[Category:ETRA]] [[Category:ETRA_SBC]]