mirror of
https://github.com/node-red/node-red.git
synced 2025-03-01 10:36:34 +00:00
New Pi GPIO node based on RPI.GPIO library.
Adds PWM support of outputs and easier access to interrupts for inputs.
This commit is contained in:
dceejay
@@ -45,7 +45,6 @@
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<option value="tri">none</option>
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<option value="up">pullup</option>
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<option value="down">pulldown</option>
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<!--<option value="tri">tristate</option>-->
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</select>
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</div>
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<div class="form-row">
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@@ -63,11 +62,11 @@
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<script type="text/x-red" data-help-name="rpi-gpio in">
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<p>Raspberry Pi input node. Generates a <b>msg.payload</b> with either a 0 or 1 depending on the state of the input pin. Requires the gpio command to work.</p>
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<p>You may also enable the input pullup resitor or the pulldown resistor.</p>
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<p>You may also enable the input pullup resistor or the pulldown resistor.</p>
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<p>The <b>msg.topic</b> is set to <i>pi/{the pin number}</i></p>
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<p>Requires the RPi.GPIO python library version 0.5.8 (or better) in order to work.</p>
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<p><b>Note:</b> we are using the actual physical pin numbers on connector P1 as they are easier to locate.</p>
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<p><b>Note:</b> This node currently polls the pin every 250mS. This is not ideal as it loads the cpu.</p>
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</script>
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</script>
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<script type="text/javascript">
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RED.nodes.registerType('rpi-gpio in',{
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@@ -90,6 +89,7 @@
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},
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oneditprepare: function() {
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var pinnow = this.pin;
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var pinsInUse = {};
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$.getJSON('rpi-gpio/'+this.id,function(data) {
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$('#pitype').text(data.type);
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if ((data.type === "Model B+") || (data.type === "Model A+")) {
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@@ -107,11 +107,31 @@
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$('#node-input-pin').val(pinnow);
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}
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});
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$.getJSON('rpi-pins/'+this.id,function(data) {
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pinsInUse = data || {};
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});
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$("#node-input-pin").change(function() {
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var pinnew = $("#node-input-pin").val();
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if ((pinnew) && (pinnew !== pinnow)) {
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if (pinsInUse.hasOwnProperty(pinnew)) {
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RED.notify("Pin "+pinnew+" already in use.","info");
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}
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pinnow = pinnew;
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}
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});
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$("#node-input-intype").change(function() {
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var newtype = $("#node-input-intype option:selected").val();
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if ((pinsInUse.hasOwnProperty(pinnow)) && (pinsInUse[pinnow] !== newtype)) {
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RED.notify("Pin "+pinnow+" already set as "+pinsInUse[pinnow],"error");
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}
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});
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}
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});
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</script>
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<script type="text/x-red" data-template-name="rpi-gpio out">
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<div class="form-row">
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<label for="node-input-pin"><i class="fa fa-circle"></i> GPIO Pin</label>
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@@ -123,7 +143,7 @@
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<option value="8">8 - TxD </option>
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<option value="10">10 - RxD </option>
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<option value="11">11 - GPIO0</option>
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<option value="12">12 - GPIO1 (PWM)</option>
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<option value="12">12 - GPIO1</option>
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<option value="13">13 - GPIO2</option>
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<option value="15">15 - GPIO3</option>
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<option value="16">16 - GPIO4</option>
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@@ -169,7 +189,8 @@
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<p>Raspberry Pi output node. Expects a <b>msg.payload</b> with either a 0 or 1 (or true or false). Requires the gpio command to work.</p>
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<p>Will set the selected physical pin high or low depending on the value passed in.</p>
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<p>The initial value of the pin at deploy time can also be set to 0 or 1.</p>
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<p>Use of PWM on Pin 12 - GPIO1 will interfere with any other audio playback.</p>
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<p>When using PWM mode - expects an input value of a number 0 - 100.</p>
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<p>Requires the RPi.GPIO python library version 0.5.8 (or better) in order to work.</p>
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<p><b>Note:</b> we are using the actual physical pin numbers on connector P1 as they are easier to locate.</p>
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</script>
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@@ -189,7 +210,7 @@
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icon: "rpi.png",
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align: "right",
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label: function() {
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if ((this.pin == 12) && (this.out === "pwm")) { return this.name || "PWM: 12"; }
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if (this.out === "pwm") { return this.name || "PWM: "+this.pin; }
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else { return this.name||"Pin: "+this.pin ; }
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},
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labelStyle: function() {
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@@ -197,6 +218,7 @@
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},
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oneditprepare: function() {
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var pinnow = this.pin;
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var pinsInUse = {};
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if (!$("#node-input-out").val()) { $("#node-input-out").val("out"); }
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$.getJSON('rpi-gpio/'+this.id,function(data) {
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$('#pitype').text(data.type);
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@@ -216,17 +238,26 @@
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}
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});
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var hidepwm = function() {
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if ($('#node-input-pin').val() == 12) {
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$('#node-set-pwm').show();
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$.getJSON('rpi-pins/'+this.id,function(data) {
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pinsInUse = data || {};
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});
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$("#node-input-pin").change(function() {
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var pinnew = $("#node-input-pin").val();
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if ((pinnew) && (pinnew !== pinnow)) {
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if (pinsInUse.hasOwnProperty(pinnew)) {
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RED.notify("Pin "+pinnew+" already in use.","info");
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}
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pinnow = pinnew;
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}
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else {
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$('#node-set-pwm').hide();
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$('#node-input-out').val("out");
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});
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$("#node-input-out").change(function() {
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var newtype = $("#node-input-out option:selected").val();
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if ((pinsInUse.hasOwnProperty(pinnow)) && (pinsInUse[pinnow] !== newtype)) {
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RED.notify("Pin "+pinnow+" already set as "+pinsInUse[pinnow],"error");
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}
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};
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$("#node-input-pin").change(function () { hidepwm(); });
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hidepwm();
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});
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var hidestate = function () {
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if ($("#node-input-out").val() === "pwm") {
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@@ -18,179 +18,202 @@ module.exports = function(RED) {
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"use strict";
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var util = require("util");
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var exec = require('child_process').exec;
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var spawn = require('child_process').spawn;
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var fs = require('fs');
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var gpioCommand = '/usr/local/bin/gpio';
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var gpioCommand = __dirname+'/nrgpio';
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if (!fs.existsSync("/dev/ttyAMA0")) { // unlikely if not on a Pi
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//util.log("Info : Ignoring Raspberry Pi specific node.");
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throw "Info : Ignoring Raspberry Pi specific node.";
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}
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if (!fs.existsSync(gpioCommand)) { // gpio command not installed
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throw "Info : Can't find Raspberry Pi wiringPi gpio command.";
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if (!fs.existsSync("/usr/share/doc/python-rpi.gpio")) {
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util.log("[rpi-gpio] Info : Can't find Pi RPi.GPIO python library.");
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throw "Warning : Can't find Pi RPi.GPIO python library.";
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}
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// Map physical P1 pins to Gordon's Wiring-Pi Pins (as they should be V1/V2 tolerant)
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var pintable = {
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// Physical : WiringPi
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"11":"0",
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"12":"1",
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"13":"2",
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"15":"3",
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"16":"4",
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"18":"5",
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"22":"6",
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"7":"7",
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"3":"8",
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"5":"9",
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"24":"10",
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"26":"11",
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"19":"12",
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"21":"13",
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"23":"14",
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"8":"15",
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"10":"16",
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"27":"30",
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"28":"31",
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"29":"21",
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"31":"22",
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"32":"26",
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"33":"23",
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"35":"24",
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"36":"27",
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"37":"25",
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"38":"28",
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"40":"29"
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}
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var tablepin = {
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// WiringPi : Physical
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"0":"11",
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"1":"12",
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"2":"13",
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"3":"15",
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"4":"16",
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"5":"18",
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"6":"22",
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"7":"7",
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"8":"3",
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"9":"5",
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"10":"24",
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"11":"26",
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"12":"19",
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"13":"21",
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"14":"23",
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"15":"8",
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"16":"10",
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"30":"27",
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"31":"28",
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"21":"29",
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"22":"31",
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"26":"32",
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"23":"33",
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"24":"35",
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"27":"36",
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"25":"37",
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"28":"38",
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"29":"40"
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if ( !(1 & parseInt ((fs.statSync(gpioCommand).mode & parseInt ("777", 8)).toString (8)[0]) )) {
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util.log("[rpi-gpio] Error : "+gpioCommand+" needs to be executable.");
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throw "Error : nrgpio must to be executable.";
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}
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var pinsInUse = {};
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var pinTypes = {"out":"digital output", "tri":"input", "up":"input with pull up", "down":"input with pull down", "pwm":"PWM output"};
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function GPIOInNode(n) {
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RED.nodes.createNode(this,n);
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this.buttonState = -1;
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this.pin = pintable[n.pin];
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this.pin = n.pin;
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this.intype = n.intype;
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this.read = n.read || false;
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if (this.read) { this.buttonState = -2; }
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var node = this;
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if (!pinsInUse.hasOwnProperty(this.pin)) {
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pinsInUse[this.pin] = this.intype;
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}
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else {
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if ((pinsInUse[this.pin] !== this.intype)||(pinsInUse[this.pin] === "pwm")) {
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node.error("GPIO pin "+this.pin+" already set as "+pinTypes[pinsInUse[this.pin]]);
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}
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}
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if (node.pin !== undefined) {
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exec(gpioCommand+" mode "+node.pin+" "+node.intype, function(err,stdout,stderr) {
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if (err) { node.error(err); }
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else {
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node._interval = setInterval( function() {
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exec(gpioCommand+" read "+node.pin, function(err,stdout,stderr) {
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if (err) { node.error(err); }
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else {
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if (node.buttonState !== Number(stdout)) {
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var previousState = node.buttonState;
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node.buttonState = Number(stdout);
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if (previousState !== -1) {
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var msg = {topic:"pi/"+tablepin[node.pin], payload:node.buttonState};
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node.send(msg);
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}
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}
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}
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});
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}, 250);
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if (node.intype === "tri") {
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node.child = spawn(gpioCommand, ["in",node.pin]);
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} else {
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node.child = spawn(gpioCommand, ["in",node.pin,node.intype]);
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}
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node.running = true;
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node.status({fill:"green",shape:"dot",text:"OK"});
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node.child.stdout.on('data', function (data) {
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data = data.toString().trim();
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if (data.length > 0) {
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if (node.buttonState !== -1) {
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node.send({ topic:"pi/"+node.pin, payload:Number(data) });
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}
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node.buttonState = data;
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node.status({fill:"green",shape:"dot",text:data});
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if (RED.settings.verbose) { node.log("out: "+data+" :"); }
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}
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});
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node.child.stderr.on('data', function (data) {
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if (RED.settings.verbose) { node.log("err: "+data+" :"); }
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});
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node.child.on('close', function (code) {
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if (RED.settings.verbose) { node.log("ret: "+code+" :"); }
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node.child = null;
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node.running = false;
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node.status({fill:"red",shape:"circle",text:""});
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});
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node.child.on('error', function (err) {
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if (err.errno === "ENOENT") { node.warn('Command not found'); }
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else if (err.errno === "EACCES") { node.warn('Command not executable'); }
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else { node.log('error: ' + err); }
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});
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}
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else {
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node.error("Invalid GPIO pin: "+node.pin);
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}
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node.on("close", function() {
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clearInterval(node._interval);
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if (node.child != null) {
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node.child.stdin.write(" close "+node.pin);
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node.child.kill('SIGKILL');
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}
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node.status({fill:"red",shape:"circle",text:""});
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delete pinsInUse[node.pin];
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if (RED.settings.verbose) { node.log("end"); }
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});
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}
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RED.nodes.registerType("rpi-gpio in",GPIOInNode);
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function GPIOOutNode(n) {
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RED.nodes.createNode(this,n);
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this.pin = pintable[n.pin];
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this.pin = n.pin;
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this.set = n.set || false;
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this.level = n.level || 0;
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this.out = n.out || "out";
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var node = this;
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(node.out === "pwm") ? (node.op = "pwm") : (node.op = "write");
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if (!pinsInUse.hasOwnProperty(this.pin)) {
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pinsInUse[this.pin] = this.out;
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}
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else {
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if ((pinsInUse[this.pin] !== this.out)||(pinsInUse[this.pin] === "pwm")) {
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node.error("GPIO pin "+this.pin+" already set as "+pinTypes[pinsInUse[this.pin]]);
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}
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}
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function inputlistener(msg) {
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if (msg.payload === "true") { msg.payload = true; }
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if (msg.payload === "false") { msg.payload = false; }
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var out = Number(msg.payload);
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var limit = 1;
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if (node.out === "pwm") { limit = 100; }
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if ((out >= 0) && (out <= limit)) {
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if (RED.settings.verbose) { node.log("inp: "+msg.payload); }
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if (node.child !== null) { node.child.stdin.write(msg.payload+"\n"); }
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else { node.warn("Command not running"); }
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node.status({fill:"green",shape:"dot",text:msg.payload});
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}
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else { node.warn("Invalid input: "+out); }
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}
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if (node.pin !== undefined) {
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exec(gpioCommand+" mode "+node.pin+" "+node.out, function(err,stdout,stderr) {
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if (err) { node.error(err); }
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else {
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if (node.set && (node.out === "out")) {
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exec(gpioCommand+" write "+node.pin+" "+node.level, function(err,stdout,stderr) {
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if (err) { node.error(err); }
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});
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}
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node.on("input", function(msg) {
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if (msg.payload === "true") { msg.payload = true; }
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if (msg.payload === "false") { msg.payload = false; }
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var out = Number(msg.payload);
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var limit = 1;
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if (node.out === "pwm") { limit = 1023; }
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if ((out >= 0) && (out <= limit)) {
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exec(gpioCommand+" "+node.op+" "+node.pin+" "+out, function(err,stdout,stderr) {
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if (err) { node.error(err); }
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});
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}
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else { node.warn("Invalid input: "+out); }
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});
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}
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if (node.set && (node.out === "out")) {
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node.child = spawn(gpioCommand, [node.out,node.pin,node.level]);
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} else {
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node.child = spawn(gpioCommand, [node.out,node.pin]);
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}
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node.running = true;
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node.status({fill:"green",shape:"dot",text:"OK"});
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node.on("input", inputlistener);
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node.child.stdout.on('data', function (data) {
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if (RED.settings.verbose) { node.log("out: "+data+" :"); }
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});
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node.child.stderr.on('data', function (data) {
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if (RED.settings.verbose) { node.log("err: "+data+" :"); }
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});
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node.child.on('close', function (code) {
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if (RED.settings.verbose) { node.log("ret: "+code+" :"); }
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node.child = null;
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node.running = false;
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node.status({fill:"red",shape:"circle",text:""});
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});
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node.child.on('error', function (err) {
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if (err.errno === "ENOENT") { node.warn('Command not found'); }
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else if (err.errno === "EACCES") { node.warn('Command not executable'); }
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else { node.log('error: ' + err); }
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});
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}
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else {
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node.error("Invalid GPIO pin: "+node.pin);
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}
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node.on("close", function() {
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exec(gpioCommand+" mode "+node.pin+" in");
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if (node.child != null) {
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node.child.stdin.write(" close "+node.pin);
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node.child.kill('SIGKILL');
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}
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node.status({fill:"red",shape:"circle",text:""});
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delete pinsInUse[node.pin];
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if (RED.settings.verbose) { node.log("end"); }
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});
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}
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var pitype = { type:"" };
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exec(gpioCommand+" -v | grep Type", function(err,stdout,stderr) {
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exec(gpioCommand+" rev 0", function(err,stdout,stderr) {
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if (err) {
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util.log('[36-rpi-gpio.js] Error: "'+gpioCommand+' -v" command failed for some reason.');
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console.log('[rpi-gpio] Version command failed for some reason.');
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}
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else {
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pitype = { type:(stdout.split(","))[0].split(": ")[1], rev:(stdout.split(","))[1].split(": ")[1] };
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if (stdout.trim() == "0") { pitype = { type:"Compute" }; }
|
||||
else if (stdout.trim() == "1") { pitype = { type:"A/B v1" }; }
|
||||
else if (stdout.trim() == "2") { pitype = { type:"A/B v2" }; }
|
||||
else if (stdout.trim() == "3") { pitype = { type:"Model B+" }; }
|
||||
else { console.log("SAW Pi TYPE",stdout.trim()); }
|
||||
}
|
||||
});
|
||||
|
||||
RED.nodes.registerType("rpi-gpio in",GPIOInNode);
|
||||
RED.nodes.registerType("rpi-gpio out",GPIOOutNode);
|
||||
|
||||
RED.httpAdmin.get('/rpi-gpio/:id',function(req,res) {
|
||||
res.send( JSON.stringify(pitype) );
|
||||
});
|
||||
|
||||
RED.httpAdmin.get('/rpi-pins/:id',function(req,res) {
|
||||
res.send( JSON.stringify(pinsInUse) );
|
||||
});
|
||||
}
|
||||
|
||||
16
nodes/core/hardware/nrgpio
Executable file
16
nodes/core/hardware/nrgpio
Executable file
@@ -0,0 +1,16 @@
|
||||
#
|
||||
# Copyright 2014 IBM Corp.
|
||||
#
|
||||
# Licensed under the Apache License, Version 2.0 (the "License");
|
||||
# you may not use this file except in compliance with the License.
|
||||
# You may obtain a copy of the License at
|
||||
# http://www.apache.org/licenses/LICENSE-2.0
|
||||
# Unless required by applicable law or agreed to in writing, software
|
||||
# distributed under the License is distributed on an "AS IS" BASIS,
|
||||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
# See the License for the specific language governing permissions and
|
||||
# limitations under the License.
|
||||
#
|
||||
|
||||
BASEDIR=$(dirname $0)
|
||||
sudo python -u $BASEDIR/nrgpio.py $@
|
||||
125
nodes/core/hardware/nrgpio.py
Normal file
125
nodes/core/hardware/nrgpio.py
Normal file
@@ -0,0 +1,125 @@
|
||||
#
|
||||
# Copyright 2014 IBM Corp.
|
||||
#
|
||||
# Licensed under the Apache License, Version 2.0 (the "License");
|
||||
# you may not use this file except in compliance with the License.
|
||||
# You may obtain a copy of the License at
|
||||
# http://www.apache.org/licenses/LICENSE-2.0
|
||||
# Unless required by applicable law or agreed to in writing, software
|
||||
# distributed under the License is distributed on an "AS IS" BASIS,
|
||||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
# See the License for the specific language governing permissions and
|
||||
# limitations under the License.
|
||||
#
|
||||
|
||||
# Import library functions we need
|
||||
import RPi.GPIO as GPIO
|
||||
import sys
|
||||
|
||||
bounce = 20 # bounce time in mS to apply
|
||||
|
||||
if len(sys.argv) > 1:
|
||||
cmd = sys.argv[1].lower()
|
||||
pin = int(sys.argv[2])
|
||||
GPIO.setmode(GPIO.BOARD)
|
||||
GPIO.setwarnings(False)
|
||||
|
||||
if cmd == "pwm":
|
||||
#print "Initialised pin "+str(pin)+" to PWM"
|
||||
GPIO.setup(pin,GPIO.OUT)
|
||||
p = GPIO.PWM(pin, 100)
|
||||
p.start(0)
|
||||
|
||||
while True:
|
||||
try:
|
||||
data = raw_input()
|
||||
if data == "close":
|
||||
GPIO.cleanup(pin)
|
||||
sys.exit(0)
|
||||
p.ChangeDutyCycle(float(data))
|
||||
except EOFError: # hopefully always caused by us sigint'ing the program
|
||||
GPIO.cleanup(pin)
|
||||
sys.exit(0)
|
||||
except Exception as ex:
|
||||
print "bad data: "+data
|
||||
|
||||
if cmd == "buzz":
|
||||
#print "Initialised pin "+str(pin)+" to Buzz"
|
||||
GPIO.setup(pin,GPIO.OUT)
|
||||
p = GPIO.PWM(pin, 100)
|
||||
p.stop()
|
||||
|
||||
while True:
|
||||
try:
|
||||
data = raw_input()
|
||||
if data == "close":
|
||||
GPIO.cleanup(pin)
|
||||
sys.exit(0)
|
||||
elif float(data) == 0:
|
||||
p.stop()
|
||||
else:
|
||||
p.start(50)
|
||||
p.ChangeFrequency(float(data))
|
||||
except EOFError: # hopefully always caused by us sigint'ing the program
|
||||
GPIO.cleanup(pin)
|
||||
sys.exit(0)
|
||||
except Exception as ex:
|
||||
print "bad data: "+data
|
||||
|
||||
elif cmd == "out":
|
||||
#print "Initialised pin "+str(pin)+" to OUT"
|
||||
GPIO.setup(pin,GPIO.OUT)
|
||||
if len(sys.argv) == 4:
|
||||
GPIO.output(pin,int(sys.argv[3]))
|
||||
|
||||
while True:
|
||||
try:
|
||||
data = raw_input()
|
||||
if data == "close":
|
||||
GPIO.cleanup(pin)
|
||||
sys.exit(0)
|
||||
data = int(data)
|
||||
except EOFError: # hopefully always caused by us sigint'ing the program
|
||||
GPIO.cleanup(pin)
|
||||
sys.exit(0)
|
||||
except:
|
||||
data = 0
|
||||
if data != 0:
|
||||
data = 1
|
||||
GPIO.output(pin,data)
|
||||
|
||||
elif cmd == "in":
|
||||
#print "Initialised pin "+str(pin)+" to IN"
|
||||
def handle_callback(chan):
|
||||
print GPIO.input(chan)
|
||||
|
||||
if len(sys.argv) == 4:
|
||||
if sys.argv[3].lower() == "up":
|
||||
GPIO.setup(pin,GPIO.IN,GPIO.PUD_UP)
|
||||
elif sys.argv[3].lower() == "down":
|
||||
GPIO.setup(pin,GPIO.IN,GPIO.PUD_DOWN)
|
||||
else:
|
||||
GPIO.setup(pin,GPIO.IN)
|
||||
else:
|
||||
GPIO.setup(pin,GPIO.IN)
|
||||
print GPIO.input(pin)
|
||||
GPIO.add_event_detect(pin, GPIO.BOTH, callback=handle_callback, bouncetime=bounce)
|
||||
|
||||
while True:
|
||||
try:
|
||||
data = raw_input()
|
||||
if data == "close":
|
||||
GPIO.cleanup(pin)
|
||||
sys.exit(0)
|
||||
except EOFError: # hopefully always caused by us sigint'ing the program
|
||||
GPIO.cleanup(pin)
|
||||
sys.exit(0)
|
||||
|
||||
elif cmd == "rev":
|
||||
print GPIO.RPI_REVISION
|
||||
|
||||
elif cmd == "ver":
|
||||
print GPIO.VERSION
|
||||
|
||||
else:
|
||||
print "Bad parameters - {in|out|pwm} {pin} {value|up|down}"
|
||||
Reference in New Issue
Block a user