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https://github.com/node-red/node-red-nodes.git
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Added BBB-digital-in
Added digital input node - initially this is just BBB-discrete-in
This commit is contained in:
Maxwell Hadley
parent
62d26c04fb
commit
83f7ff429f
111
hardware/BBB/145-digital-in.html
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hardware/BBB/145-digital-in.html
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<!--
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Copyright 2014 Maxwell R Hadley
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<!-- First, the content of the edit dialog is defined. -->
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<script type="text/x-red" data-template-name="BBB-discrete-in">
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<div class="form-row">
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<label for="node-input-pin"><i class="icon-asterisk"></i>Input pin</label>
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<select type="text" id="node-input-pin" style="width: 180px;">
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<option value="">select pin</option>
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<option value="P8_7">GPIO2_2 (P8 pin 7)</option>
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<option value="P8_8">GPIO2_3 (P8 pin 8)</option>
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<option value="P8_9">GPIO2_5 (P8 pin 9)</option>
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<option value="P8_10">GPIO2_4 (P8 pin 10)</option>
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<option value="P8_11">GPIO1_13 (P8 pin 11)</option>
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<option value="P8_12">GPIO1_12 (P8 pin 12)</option>
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<option value="P8_13">GPIO0_23 (P8 pin 13)</option>
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<option value="P8_14">GPIO0_26 (P8 pin 14)</option>
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<option value="P8_15">GPIO1_15 (P8 pin 15)</option>
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<option value="P8_16">GPIO1_14 (P8 pin 16)</option>
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<option value="P8_17">GPIO0_27 (P8 pin 17)</option>
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<option value="P8_18">GPIO2_1 (P8 pin 18)</option>
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<option value="P8_19">GPIO0_22 (P8 pin 19)</option>
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<option value="P8_26">GPIO1_29 (P8 pin 26)</option>
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<option value="P9_11">GPIO0_30 (P9 pin 11)</option>
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<option value="P9_12">GPIO1_28 (P9 pin 12)</option>
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<option value="P9_13">GPIO0_31 (P9 pin 13)</option>
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<option value="P9_14">GPIO1_18 (P9 pin 14)</option>
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<option value="P9_15">GPIO1_16 (P9 pin 15)</option>
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<option value="P9_16">GPIO1_19 (P9 pin 16)</option>
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<option value="P9_17">GPIO0_5 (P9 pin 17)</option>
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<option value="P9_18">GPIO0_4 (P9 pin 18)</option>
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<option value="P9_21">GPIO0_3 (P9 pin 21)</option>
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<option value="P9_22">GPIO0_2 (P9 pin 22)</option>
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<option value="P9_23">GPIO1_17 (P9 pin 23)</option>
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<option value="P9_24">GPIO0_15 (P9 pin 24)</option>
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<option value="P9_26">GPIO0_14 (P9 pin 26)</option>
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<option value="P9_27">GPIO3_19 (P9 pin 27)</option>
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<option value="P9_30">GPIO3_16 (P9 pin 30)</option>
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<option value="P9_41">GPIO0_20 (P9 pin 41)</option>
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<option value="P9_42">GPIO0_7 (P9 pin 42)</option>
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</select>
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</div>
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<div class="form-row">
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<label for="node-input-updateInterval"><i class="icon-repeat"></i>Update every</label>
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<input id="node-input-updateInterval" type="text">
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<label>s</label>
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</div>
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<div class="form-row">
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<label for="node-input-topic"><i class="icon-tasks"></i> Topic</label>
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<input type="text" id="node-input-topic" placeholder="Topic">
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</div>
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<!-- By convention, most nodes have a 'name' property. The following div -->
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<!-- provides the necessary field. -->
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<div class="form-row">
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<label for="node-input-name"><i class="icon-tag"></i> Name</label>
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<input type="text" id="node-input-name" placeholder="Name">
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</div>
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</script>
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<!-- Next, some simple help text is provided for the node. -->
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<script type="text/x-red" data-help-name="BBB-discrete-in">
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<!-- data-help-name identifies the node type this help is for -->
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<!-- This content appears in the Info sidebar when a node is selected -->
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<!-- The first <p> is used as the pop-up tool tip when hovering over a -->
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<!-- node in the palette. -->
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<p>Discrete input for the Beaglebone Black. Sends a message on the first output
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each time the pin changes state, and
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records the total time in the active state</p>
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<p>A timer updates the total active time, sending a message on the 2nd output at the chosen interval.
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An input (any input) message will reset the total active time</p>
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</script>
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<!-- Finally, the node type is registered along with all of its properties -->
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<!-- The example below shows a small subset of the properties that can be set-->
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<script type="text/javascript">
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RED.nodes.registerType('BBB-discrete-in',{
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category: 'advanced-input', // the palette category
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color:"#c6abef",
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defaults: { // defines the editable properties of the node
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name: { value:"" }, // along with default values.
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updateInterval: { value:5 },
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topic: { value:"", required:true },
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pin: { value:"", required:true },
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},
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inputs:1, // set the number of inputs - only 0 or 1
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outputs:2, // set the number of outputs - 0 to n
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icon: "arrow-in.png", // set the icon (held in public/icons)
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label: function() { // sets the default label contents
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return this.name || "discrete-in: " + this.pin;
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},
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labelStyle: function() { // sets the class to apply to the label
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return this.name?"node_label_italic":"";
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}
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});
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</script>
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137
hardware/BBB/145-digital-in.js
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hardware/BBB/145-digital-in.js
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/**
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* Copyright 2014 Maxwell R Hadley
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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**/
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// Require main module
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var RED = require(process.env.NODE_RED_HOME + "/red/red");
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// Require bonescript
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try {
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var bs = require("bonescript");
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} catch(err) {
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require("util").log("[BBB-discrete-in] Error: cannot find module 'bonescript'");
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}
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// The node constructor
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function DiscreteInputNode(n) {
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RED.nodes.createNode(this, n);
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// Store local copies of the node configuration (as defined in the .html)
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this.topic = n.topic; // the topic is not currently used
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this.pin = n.pin; // The Beaglebone Black pin identifying string
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this.updateInterval = n.updateInterval*1000; // How often to send total active time messages
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// Define 'node' to allow us to access 'this' from within callbacks (the 'var' is essential -
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// otherwise there is only one 'node' for all instances of DiscreteInputNode!)
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var node = this;
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this.interruptAttached = false; // Flag: should we detach interrupt when we are closed?
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this.intervalId = null; // Remember the timer ID so we can delete it when we are closed
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this.currentState = 0; // The pin input state "1" or "0"
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this.lastActiveTime = 0; // The date (in ms since epoch) when the pin last went high
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this.totalActiveTime = 0; // The total time in ms that the pin has been high (since reset)
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this.starting = true;
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// This function is called whenver the input pin changes state. We update the currentState
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// and the ActiveTime variables, and send a message on the first output with the new state
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var interruptCallback = function (x) {
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if (node.currentState == x.value) {
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node.error("Spurious interrupt" + x.value);
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} else {
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node.currentState = x.value;
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var now = Date.now();
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if (node.currentState == "1") {
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node.lastActiveTime = now;
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} else {
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node.totalActiveTime += now - node.lastActiveTime;
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}
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}
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var msg = {};
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msg.payload = node.currentState;
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node.send([msg, null]);
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};
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// This function is called by the timer. It updates the ActiveTime variables, and sends a
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// message on the second output with the latest value of the total active time, in seconds
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var timerCallback = function () {
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if (node.currentState == "1") {
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var now = Date.now();
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node.totalActiveTime += now - node.lastActiveTime;
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node.lastActiveTime = now;
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}
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var msg = {};
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msg.payload = node.totalActiveTime/1000;
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node.send([null, msg]);
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};
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// This function is called when we receive an input message. Clear the ActiveTime variables
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// (so we start counting from zero again)
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var inputCallback = function (msg) {
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node.totalActiveTime = 0;
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if (node.currentState == "1") {
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node.lastActiveTime = Date.now();
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}
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if (node.starting) {
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node.starting = 0;
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var msg1 = {};
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msg1.payload = node.currentState;
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var msg2 = {};
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msg2.payload = node.totalActiveTime/1000;
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node.send([null, msg2]);
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node.send([msg1, null]);
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node.error("Initial message" + msg1 + " " + msg2);
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}
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};
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// If we have a valid pin, set it as an input and read the (digital) state
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if (["P8_7", "P8_8", "P8_9", "P8_10", "P8_11", "P8_12", "P8_13", "P8_14", "P8_15",
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"P8_16", "P8_17", "P8_18", "P8_19", "P8_26", "P9_11", "P9_12", "P9_13", "P9_14",
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"P9_15", "P9_16", "P9_17", "P9_18", "P9_21", "P9_22", "P9_23", "P9_24", "P9_26",
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"P9_27", "P9_30", "P9_41", "P9_42"].indexOf(node.pin) >= 0) {
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bs.pinMode(node.pin, bs.INPUT);
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bs.digitalRead(node.pin, function (x) {
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// Initialise the currentState and lastActveTime variables based on the value read
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node.currentState = x;
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if (node.currentState == "1") {
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node.lastActiveTime = Date.now();
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}
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// Attempt to attach a change-of-state interrupt handler to the pin. If we succeed,
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// set the input event and interval handlers, then send an initial message with the
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// pin state on the first output
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if (bs.attachInterrupt(node.pin, true, bs.CHANGE, interruptCallback)) {
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node.interruptAttached = true;
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node.on("input", inputCallback);
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node.intervalId = setInterval(timerCallback, node.updateInterval);
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} else {
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node.error("Failed to attach interrupt");
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}
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setTimeout(function () { node.starting = 1; node.emit("input", {}); }, 250);
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});
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} else {
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node.error("Unconfigured input pin");
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}
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}
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// Register the node by name. This must be called before overriding any of the Node functions.
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RED.nodes.registerType("BBB-discrete-in", DiscreteInputNode);
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// On close, detach the interrupt (if we attaced one) and clear the interval (if we set one)
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DiscreteInputNode.prototype.close = function () {
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if (this.interruptAttached) {
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bs.detachInterrupt(this.pin);
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}
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if (this.intervalId!= null) {
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clearInterval(this.intervalId);
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}
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};
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