module.exports = function(RED) { "use strict"; var util = require("util"); var spawn = require('child_process').spawn; var fs = require('fs'); var gpioCommand = __dirname+'/nrgpio.py'; if (!fs.existsSync("/dev/ttyAMA0")) { // unlikely if not on a Pi //util.log("Info : Ignoring Raspberry Pi specific node."); throw "Info : Ignoring Raspberry Pi specific node."; } if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) { util.log("[rpi-gpio] Info : Can't find Pi RPi.GPIO python library."); throw "Warning : Can't find Pi RPi.GPIO python library."; } if ( !(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]) )) { util.log("[rpi-gpio] Error : "+gpioCommand+" needs to be executable."); throw "Error : " + gpioCommand + " must to be executable."; } function PiLiter(n) { RED.nodes.createNode(this,n); this.pinv = n.pin; this.dir = (n.dir ? 1 : 0) || 0; var node = this; if (this.pinv === "bar") { node.child = spawn(gpioCommand, ["byte",node.dir]); node.on("input", function(msg) { var out = Number(msg.payload); if ((out >= 1) && (out <= 8)) { out = Math.pow(2, out) - 1; } else { out = 0; } if (node.child !== null) { node.child.stdin.write(out+"\n"); } else { node.warn("Command not running"); } }); } else if (this.pinv === "meter") { node.child = spawn(gpioCommand, ["byte",node.dir]); node.on("input", function(msg) { var out = Number(msg.payload); if ((out >= 1) && (out <= 8)) { out = Math.pow(2, (out-1)); } else { out = 0; } if (node.child !== null) { node.child.stdin.write(out+"\n"); } else { node.warn("Command not running"); } }); } else if (this.pinv === "all") { node.child = spawn(gpioCommand, ["byte",node.dir]); node.on("input", function(msg) { var out = msg.payload; if ((out === 1)|(out === true)|(out === "1")|(out === "on")) { out = 255; } else { out = 0; } if (node.child !== null) { node.child.stdin.write(out+"\n"); } else { node.warn("Command not running"); } }); } else if (this.pinv === "pin") { node.child = spawn(gpioCommand, ["byte",node.dir]); var byte = 0; node.on("input", function(msg) { if (typeof msg.payload === "object") { var out = Number(msg.payload.led); var l = Number(msg.payload.state); if ((out >= 1) && (out <= 8)) { out = (Math.pow(2, (out-1))); if (l === 0) { out = ~ out; } byte = byte & out & 255; console.log("NOW",byte); if (node.child !== null) { node.child.stdin.write(byte+"\n"); } else { node.warn("Command not running"); } } else { node.warn("Not a valid object - see Info panel."); } } else { node.warn("Not a valid object - see Info panel."); } }); } else { node.child = spawn(gpioCommand, ["byte",node.dir]); node.on("input", function(msg) { var out = Number(msg.payload); if ((out >= 0) && (out <= 255)) { if (node.child !== null) { node.child.stdin.write(out+"\n"); } else { node.warn("Command not running"); } } else { node.warn("Invalid input - not between 0 and 255"); } }); } node.on("close", function() { if (node.child != null) { node.child.kill('SIGKILL'); } if (RED.settings.verbose) { node.log("end"); } }); } RED.nodes.registerType("rpi-liter",PiLiter); }