Daisy GPIO

This module provide a simple full asynchronous interface to manage Acmesystems Daisy modules for Aria and FoxBoard products. Visit AcmeSystems official site for more informations about this hardware.

To create documentation you must install JSDuck and type in your terminal:

$ ./gen_doc.sh

Please visit Yoovant website for more informations.

Usage

If you have a new amazing Acmesystem Aria board or a FoxBoad G20, you can easy manage GPIO using Node.js and this module to manage Daisy board for fast prototyping.

Install the package as usual:

debarm:~# npm install daisy_gpio

Now you can write a simple program to turn on a led when push a button using two prototype boards: Daisy5 and Daisy11. Assuming you connect Daisy5 to D5 connector and Daisy11 to D2 connector of your FoxBoard, your first program seems like this:

var daisy = require('daisy')({
    model: 'fox',   // set to aria if you have this board
    test: false,    // set true if you want use a fake gpio path.
                    // Note that the change, falling and rising events can't fires
    debug: false    // set true if you want see debug messages into terminal window
});
// create a new Daisy5 instance (8 buttons array)
var daisy5 = new daisy.Daisy5();
// attach the init event (fired when ALL buttons are ready)
daisy5.attach('init', function(event) {
    console.log('init daisy5');
});
// create a new Daisy11 instance (8 leds array)
var daisy11 = new daisy.Daisy11();
// attach the init event (fired when ALL leds are ready)
daisy11.attach('init', function(event) {
    console.log('init daisy11');
});
// attach the rising event fired for EVERY button when pressed
daisy5.attach('rising', function(event) {
    daisy11.instances[event.data.sender.index].setHigh();
});
// attach the falling event fired for EVERY button when released
daisy5.attach('falling', function(event) {
    daisy11.instances[event.data.sender.index].setLow();
});
// attach the rising event fired for EVERY led is turned on
daisy11.attach('rising', function(event) {
    console.log('turned on led #' + event.data.sender.index);
});
// attach the falling event fired for EVERY led is turned off
daisy11.attach('falling', function(event) {
    console.log('turned off led #' + event.data.sender.index);
});

Save your file as presstolight.js and run in your terminal:

debarm:~# node presstolight.js

Now if you push a button, the corresponding led is turned on. Easy, right? Note that the init and free events are fired only when ALL leds (buttons) of Daisy11 (Daisy5) are ready to use and available respectively, whereas the rising and falling events are fired by every led (button). Note also that all events have a data property that contains two properties:

• err: the error if occurred
• sender: the Gpio instance that has fired the event

The event.data for a change event has also a value property with the last value.

See full documentation into doc folder and some examples into test folder within the daisy_gpio package.