From 983dafff137f0adef2709f3638ac570594ce4f2e Mon Sep 17 00:00:00 2001
From: Ivan Mikhaylov <fr0st61te@gmail.com>
Date: Tue, 12 Jul 2022 12:10:49 +0300
Subject: [PATCH] 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>
---
 hardware/intel/mraa-gpio-din.html | 30 +++++++++++++++++++++++++++---
 hardware/intel/mraa-gpio-din.js   | 29 ++++++++++++++++++++++++-----
 2 files changed, 51 insertions(+), 8 deletions(-)

diff --git a/hardware/intel/mraa-gpio-din.html b/hardware/intel/mraa-gpio-din.html
index fdbcfc45..88e256bd 100644
--- a/hardware/intel/mraa-gpio-din.html
+++ b/hardware/intel/mraa-gpio-din.html
@@ -1,13 +1,15 @@
 
 <script type="text/javascript">
     RED.nodes.registerType('mraa-gpio-din',{
-        category: 'Intel gpio',
+        category: 'GPIO',
         color: '#a6bbcf',
         paletteLabel: 'digital',
         defaults: {
             name: {value:""},
             pin:  {value:"", required: true},
-            interrupt: {value:"", required: true}
+            interrupt: {value:"", required: true},
+            mode: {value:"", required: true},
+            initial: {value: false}
         },
         inputs:0,
         outputs:1,
@@ -30,6 +32,7 @@
                 if (data === 5) { t = "Raspberry Pi"; }
                 if (data === 6) { t = "Beaglebone"; }
                 if (data === 7) { t = "Banana"; }
+                if (data === 25) { t = "IOT2050"; }
                 $('#type-tip').text(t);
                 $('#node-input-pin').val(pinnow);
             });
@@ -59,6 +62,22 @@
             <option value="11">D11</option>
             <option value="12">D12</option>
             <option value="13">D13</option>
+            <option value="14">D14</option>
+            <option value="15">D15</option>
+            <option value="16">D16</option>
+            <option value="17">D17</option>
+            <option value="18">D18</option>
+            <option value="19">D19</option>
+        </select>
+    </div>
+    <div class="form-row">
+        <label for="node-input-name"><i class="fa-level-up"></i> Mode</label>
+        <select type="text" id="node-input-mode" style="width: 250px;">
+            <option value='' disabled selected style='display:none;'>select mode</option>
+            <option value="0">Strong </option>
+            <option value="1">Pull-up </option>
+            <option value="2">Pull-down </option>
+            <option value="3">Hiz </option>
         </select>
     </div>
     <div class="form-row">
@@ -70,6 +89,11 @@
             <option value="b">Both </option>
         </select>
     </div>
+    <div class="form-row" id="node-initial-tick">
+        <label>&nbsp;</label>
+        <input type="checkbox" id="node-input-initial" style="display: inline-block; width: auto; vertical-align: top;">
+        <label for="node-input-initial" style="width: 70%;">Send initial message with level of pin.</label>
+    </div>
     <div class="form-row">
         <label for="node-input-name"><i class="fa fa-tag"></i> Name</label>
         <input type="text" id="node-input-name" placeholder="Name" style="width: 250px;">
@@ -78,7 +102,7 @@
 </script>
 
 <script type="text/x-red" data-help-name="mraa-gpio-din">
-    <p>A digital input pin for an Intel Galileo or Edison board.</p>
+    <p>A digital input pin for an Intel Galileo/Edison/Siemens IOT2050 board.</p>
     <p>The <code>msg.payload</code> contains the value (0 or 1), and <code>msg.topic</code>
     contains "{the_board_name}/D{the pin number}".</p>
 </script>
diff --git a/hardware/intel/mraa-gpio-din.js b/hardware/intel/mraa-gpio-din.js
index 5966e448..cfb79612 100644
--- a/hardware/intel/mraa-gpio-din.js
+++ b/hardware/intel/mraa-gpio-din.js
@@ -7,13 +7,16 @@ module.exports = function(RED) {
         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(m.PIN_GPIO);
+        node.x.mode(parseInt(this.mode));
         node.x.dir(m.DIR_IN);
-        node.x.isr(m.EDGE_BOTH, function() {
-            var g = node.x.read();
+
+        var eventHandler = function(g) {
             var msg = { payload:g, topic:node.board+"/D"+node.pin };
             switch (g) {
                 case 0: {
@@ -34,8 +37,15 @@ module.exports = function(RED) {
                     node.status({fill:"grey",shape:"ring",text:"unknown"});
                 }
             }
-        });
-        switch (node.x.read()) {
+        }
+
+        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;
@@ -48,8 +58,17 @@ module.exports = function(RED) {
                 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);