gpio.md

GPIO

• map
• name
• index
• header
• capture
• release
• releaseall
• pin
• out
• get
• set
• high
• low

GPIO

The GPIO library provides access to the General Purpose Input Output interface available in Linux. The pin mapping functionality is currently only available for Raspberry Pi. The "map" function sets up lookup tables for finding pins by name, index, or header. For Raspberry Pi, the index follows the same number as used by WiringPi.

gpio.map( name )

Sets the pin map that should be used.

--sets the map to the raspberry pi map
gpio.map("ip");

gpio.name( name )

Get a pin from the set map by the name.

pin = gpio.name("SDA");

gpio.index( index )

Get a pin by the index of the pin.

pin = gpio.index(5);

gpio.header( header )

The header number of the pin.

pin = gpio.header(5);

gpio.capture( pin )

Capture pins when you like to control them give the method a pin to capture. No other application can use the pin.

pin = gpio.index(5);
gpio.capture(pin);

gpio.release( pin )

Release the pin back to the operatingsystem.

pin = gpio.index(5);
gpio.release(pin);

gpio.in( pin )

Set the direction of the pin to an input pin.

pin = gpio.index(5);
gpio.in(pin);

gpio.out( pin )

Set the direction of the pin to an output pin.

pin = gpio.index(5);
gpio.out(pin);

gpio.get( pin )

Check pin if it is high or low. Returns true if pin is high.

pin = gpio.index(5);
res = gpio.get(pin);

gpio.set( pin, value )

Set the pin to high or low. Set value to true if pin should be high.

pin = gpio.index(5);
--pin set to high
gpio.set(pin, true);
--pin set to low
gpio.set(pin, false);

gpio.high( pin )

Set the pin to high.

pin = gpio.index(5);
--pin set to high
gpio.high(pin);

gpio.low( pin )

Set the pin to low.

pin = gpio.index(5);
--pin set to low
gpio.low(pin);