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node-red-nodes/hardware/intel/mraa-gpio-din.js
Ivan Mikhaylov 983dafff13
mraa gpio din features (#929)
* mraa-gpio-din: add iot2050 board

This patch adds iot2050 board in possible list of boards.

Signed-off-by: zengchao <chao.zeng@siemens.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Ivan Mikhaylov <ivan.mikhaylov@siemens.com>

* mraa-gpio-din: add cleanup on close

Required as nodejs will only lazily delete the node objects, and we may
race with the next user requesting the resources. ISR thread release.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Ivan Mikhaylov <ivan.mikhaylov@siemens.com>

* mraa-gpio-din: extend GPIO lines

Signed-off-by: zengchao <chao.zeng@siemens.com>
Signed-off-by: Ivan Mikhaylov <ivan.mikhaylov@siemens.com>

* mraa-gpio-din: add configurable GPIO mode for DIN

GPIO mode wasn't set correctly, it was set from Pinmuxes modes instead
of GPIO. Add way to control GPIO modes on DINs from Node-RED with
possible values from mraa : Strong, Hiz, Pull-down, Pull-up.

Signed-off-by: Ivan Mikhaylov <ivan.mikhaylov@siemens.com>

* mraa-gpio-din: add support for initial message from digital input

This allows to send out an initial message with the current digital pin
state on startup, simplifying initializations of certain flows.

Based on siemens/meta-iot2000@5fc2bbe patch 0003.

Signed-off-by: Ivan Mikhaylov <ivan.mikhaylov@siemens.com>
2022-07-12 10:10:49 +01:00

76 lines
2.3 KiB
JavaScript

module.exports = function(RED) {
var m = require('mraa');
//console.log("BOARD :",m.getPlatformName());
function gpioDin(n) {
RED.nodes.createNode(this,n);
this.pin = n.pin;
this.interrupt = n.interrupt;
this.mode = n.mode;
this.initialMsg = n.initial;
this.x = new m.Gpio(parseInt(this.pin));
this.board = m.getPlatformName();
this.defaultTimeout = 100;
var node = this;
node.x.mode(parseInt(this.mode));
node.x.dir(m.DIR_IN);
var eventHandler = function(g) {
var msg = { payload:g, topic:node.board+"/D"+node.pin };
switch (g) {
case 0: {
node.status({fill:"green",shape:"ring",text:"low"});
if (node.interrupt=== "f" || node.interrupt === "b") {
node.send(msg);
}
break;
}
case 1: {
node.status({fill:"green",shape:"dot",text:"high"});
if (node.interrupt=== "r" || node.interrupt === "b") {
node.send(msg);
}
break;
}
default: {
node.status({fill:"grey",shape:"ring",text:"unknown"});
}
}
}
var isrCallback = function() {
eventHandler(node.x.read());
}
node.x.isr(m.EDGE_BOTH, isrCallback);
var initialState = node.x.read();
switch (initialState) {
case 0: {
node.status({fill:"green",shape:"ring",text:"low"});
break;
}
case 1: {
node.status({fill:"green",shape:"dot",text:"high"});
break;
}
default: {
node.status({});
}
}
if (this.initialMsg) {
setTimeout(() => {
node.send( { payload: node.x.read(), topic:node.board+"/D"+node.pin } );
}, this.defaultTimeout);
}
this.on('close', function() {
node.x.isr(m.EDGE_BOTH, null);
node.x.isrExit();
node.x.close();
});
}
RED.nodes.registerType("mraa-gpio-din", gpioDin);
}