Add byte mode and mouse buttons to Pi node

nodes/core/hardware/36-rpi-gpio.html

@@ -288,3 +288,47 @@
         }
     });
 </script>
+
+<script type="text/x-red" data-template-name="rpi-mouse">
+    <div class="form-row">
+        <label for="node-input-butt"><i class="fa fa-circle"></i> Button</label>
+        <select type="text" id="node-input-butt" style="width: 250px;">
+            <option value="1">left</option>
+            <option value="2">right</option>
+            <option value="4">middle</option>
+            <option value="7">any</option>
+         </select>
+    </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">
+    </div>
+</script>
+
+<script type="text/x-red" data-help-name="rpi-mouse">
+    <p>Raspberry Pi mouse button node. Generates a <b>msg.payload</b> with
+    either a 1 or 0 when the selected mouse button is pressed and released</p>
+    <p>Also sets <b>msg.button</b> to the code value, 1 = left, 2 = right, 4 = middle,
+    so you can work out which button or combination was pressed.</p>
+    <p>And sets <b>msg.topic</b> to <i>pi/mouse</i>.</p>
+</script>
+
+<script type="text/javascript">
+    RED.nodes.registerType('rpi-mouse',{
+        category: 'Raspberry Pi',
+        color:"#c6dbef",
+        defaults: {
+            name: { value:"" },
+            butt: { value:"1",required:true }
+        },
+        inputs:0,
+        outputs:1,
+        icon: "rpi.png",
+        label: function() {
+            return this.name||"Pi Mouse" ;
+        },
+        labelStyle: function() {
+            return this.name?"node_label_italic":"";
+        }
+    });
+</script>

nodes/core/hardware/36-rpi-gpio.js

@@ -38,6 +38,9 @@ module.exports = function(RED) {
         throw "Error : nrgpio must to be executable.";
     }
 
+    // the magic to make python print stuff immediately
+    process.env.PYTHONUNBUFFERED = 1;
+
     var pinsInUse = {};
     var pinTypes = {"out":"digital output", "tri":"input", "up":"input with pull up", "down":"input with pull down", "pwm":"PWM output"};
 
@@ -209,6 +212,48 @@ module.exports = function(RED) {
     });
     RED.nodes.registerType("rpi-gpio out",GPIOOutNode);
 
+    function PiMouseNode(n) {
+        RED.nodes.createNode(this,n);
+        this.butt = n.butt || 7;
+        var node = this;
+
+        node.child = spawn(gpioCommand+".py", ["mouse",node.butt]);
+        node.status({fill:"green",shape:"dot",text:"OK"});
+
+        node.child.stdout.on('data', function (data) {
+            data = Number(data);
+            if (data === 0) { node.send({ topic:"pi/mouse", button:data, payload:0 }); }
+            else { node.send({ topic:"pi/mouse", button:data, payload:1 }); }
+        });
+
+        node.child.stderr.on('data', function (data) {
+            if (RED.settings.verbose) { node.log("err: "+data+" :"); }
+        });
+
+        node.child.on('close', function (code) {
+            if (RED.settings.verbose) { node.log("ret: "+code+" :"); }
+            node.child = null;
+            node.running = false;
+            node.status({fill:"red",shape:"circle",text:""});
+        });
+
+        node.child.on('error', function (err) {
+            if (err.errno === "ENOENT") { node.warn('Command not found'); }
+            else if (err.errno === "EACCES") { node.warn('Command not executable'); }
+            else { node.log('error: ' + err); }
+        });
+
+        node.on("close", function() {
+            if (node.child != null) {
+                node.child.kill('SIGINT');
+                node.child = null;
+            }
+            node.status({fill:"red",shape:"circle",text:""});
+            if (RED.settings.verbose) { node.log("end"); }
+        });
+    }
+    RED.nodes.registerType("rpi-mouse",PiMouseNode);
+
     RED.httpAdmin.get('/rpi-gpio/:id',function(req,res) {
         res.send( JSON.stringify(pitype) );
     });

nodes/core/hardware/nrgpio.py

@@ -1,3 +1,4 @@
+#!/usr/bin/python
 #
 # Copyright 2014 IBM Corp.
 #
@@ -43,7 +44,7 @@ if len(sys.argv) > 1:
             except Exception as ex:
                 print "bad data: "+data
 
-    if cmd == "buzz":
+    elif cmd == "buzz":
         #print "Initialised pin "+str(pin)+" to Buzz"
         GPIO.setup(pin,GPIO.OUT)
         p = GPIO.PWM(pin, 100)
@@ -115,11 +116,56 @@ if len(sys.argv) > 1:
                 GPIO.cleanup(pin)
                 sys.exit(0)
 
+    elif cmd == "byte":
+        #print "Initialised BYTE mode - "+str(pin)+
+        list = [7,11,13,12,15,16,18,22]
+        GPIO.setup(list,GPIO.OUT)
+
+        while True:
+            try:
+                data = raw_input()
+                if data == "close":
+                    GPIO.cleanup()
+                    sys.exit(0)
+                data = int(data)
+            except EOFError:        # hopefully always caused by us sigint'ing the program
+                GPIO.cleanup()
+                sys.exit(0)
+            except:
+                data = 0
+            for bit in range(8):
+                if pin == 1:
+                    mask = 1 << (7 - bit)
+                else:
+                    mask = 1 << bit
+                GPIO.output(list[bit], data & mask)
+
     elif cmd == "rev":
         print GPIO.RPI_REVISION
 
     elif cmd == "ver":
         print GPIO.VERSION
 
+    elif cmd == "mouse":  # catch mice button events
+        file = open( "/dev/input/mice", "rb" )
+        oldbutt = 0
+
+        def getMouseEvent():
+          global oldbutt
+          global pin
+          buf = file.read(3)
+          pin = pin & 0x07
+          button = ord( buf[0] ) & pin # mask out just the required button(s)
+          if button != oldbutt:  # only send if changed
+              oldbutt = button
+              print button
+
+        while True:
+            try:
+                getMouseEvent()
+            except:
+                file.close()
+                sys.exit(0)
+
 else:
     print "Bad parameters - {in|out|pwm} {pin} {value|up|down}"