wiringPi nit wrapper

Installation

You need to install the wiringPi library. Refer to download and install manual.

Compiling

Link to the library must be passed to nit compiler:

nitc myprogram.nit --cc-lib-name wiringPi

Usage

You first need to initialize the wiringPi library using a setup methods.

Setup methods are:

• wiringPi_setup: This initialises wiringPi and assumes that the calling program is going to be using the wiringPi pin numbering scheme;
• wiringPi_setup_gpio: Same as wiringPi_setup, however it allows the calling programs to use the Broadcom GPIO pin numbers directly with no re-mapping;
• wiringPi_setup_phys: Identical to wiringPi_setup, however it allows the calling programs to use the physical pin numbers on the P1 connector only;
• wiringPi_setup_sys: This initialises wiringPi but uses the /sys/class/gpio interface rather than accessing the hardware directly;

For example:

wiringPi_set_gpio

Then you can refer to a GPIO Pin using its id:

var pin = new RPIPin(23)

Before read or write a value on a pin you need to set its mode.

Modes are:

• INPUT
• OUTPUT
• PWM_OUTPUT
• GPIO_CLOCK

Note that only wiringPi pin 1 (BCM_GPIO 18) supports PWM output and only wiringPi pin 7 (BCM_GPIO 4) supports CLOCK output modes.

pin.mode(new RPIPinMode.output_mode)

You can then write or read a value from the pin:

pin.write(true)
pin.read

Copyrigth

The wiringPi library is released under GNU LGPLv3 licence.