# HG changeset patch
# User Matt Johnston <matt@ucc.asn.au>
# Date 1432137669 -28800
# Node ID c9b20d3d393abe482f6996ee0ff8e8519b038be5
# Parent  2d46d7f1ccf0d4c90a445b4e53845d84d3b6a47b# Parent  2caee09f41c4008f6df66c73eec0987050ed432e
merge

diff -r 2caee09f41c4 -r c9b20d3d393a py/gpio_rpi.py
--- a/py/gpio_rpi.py	Wed May 20 00:03:53 2015 +0800
+++ b/py/gpio_rpi.py	Thu May 21 00:01:09 2015 +0800
@@ -7,15 +7,43 @@
 __all__ = ["Gpio"]
 
 class Gpio(object):
-	def __init__(self, pin, name):
-		self.pin = pin
-		self.name = name
-		GPIO.setmode(GPIO.BOARD)
-		GPIO.setup(self.pin, GPIO.OUT)
+    SYS_GPIO_BASE = '/sys/class/gpio/gpio'
+    def __init__(self, pin, name):
+        self.pin = pin
+        self.name = name
+
+        dir_fn = '%s%d/direction' % (self.SYS_GPIO_BASE, pin)
+        with open(dir_fn, 'w') as f:
+            # make sure it doesn't start "on"
+            f.write('low')
+        val_fn = '%s%d/value' % (self.SYS_GPIO_BASE, pin)
+        self.value_file = open(val_fn, 'r+')
+
+    def turn(self, value):
+        self.value_file.seek(0)
+        self.value_file.write('1' if value else '0')
+        self.value_file.flush()
 
-	def turn(self, value):
-		self.state = bool(value)
-		GPIO.output(self.pin, self.state)
+    def get_state(self):
+        self.value_file.seek(0)
+        buf = self.value_file.read().strip()
+        if buf == '0':
+            return False
+        if buf != '1':
+            E("Bad value read from gpio '%s': '%s'" 
+                % (self.value_file.name, buf))
+        return True
+
 
-	def get_state(self):
-		return GPIO.input(self.pin)
+def main():
+    g = Gpio(17, 'f')
+    g.turn(1)
+
+    print(g.get_state())
+
+    g.turn(0)
+
+    print(g.get_state())
+
+if __name__ == '__main__':
+    main()
diff -r 2caee09f41c4 -r c9b20d3d393a web/config.py
--- a/web/config.py	Wed May 20 00:03:53 2015 +0800
+++ b/web/config.py	Thu May 21 00:01:09 2015 +0800
@@ -16,9 +16,11 @@
 
 UPDATE_URL = 'http://evil.ucc.asn.au/~matt/templog/update'
 
-GRAPH_WIDTH = 1200
-GRAPH_HEIGHT = 600
+GRAPH_WIDTH = 600
+GRAPH_HEIGHT = 700
 ZOOM = 1
+# determine by viewing the image
+GRAPH_LEFT_MARGIN = 65
 
 LINE_WIDTH = 2
 
@@ -50,8 +52,6 @@
 GRAPH_FONT = "Prociono"
 #GRAPH_FONT = "URW Gothic L"
 
-# determine by zooming in an image viewer
-GRAPH_LEFT_MARGIN = 63
 
 # 1 hour
 CSRF_TIMEOUT = 3600
diff -r 2caee09f41c4 -r c9b20d3d393a web/templog.py
--- a/web/templog.py	Wed May 20 00:03:53 2015 +0800
+++ b/web/templog.py	Thu May 21 00:01:09 2015 +0800
@@ -51,15 +51,22 @@
 
     return "OK"
 
+def make_graph(length, end):
+    length_minutes = int(length)
+    end = datetime.strptime(end, DATE_FORMAT)
+    start = end - timedelta(minutes=length_minutes)
+
+    start_epoch = time.mktime(start.timetuple())
+    return log.graph_png(start_epoch, length_minutes * 60)
+
+def encode_data(data, mimetype):
+    return 'data:%s;base64,%s' % (mimetype, binascii.b2a_base64(data).rstrip())
+
+
 @route('/graph.png')
 def graph():
-    length_minutes = int(request.query.length)
-    end = datetime.strptime(request.query.end, DATE_FORMAT)
-    start = end - timedelta(minutes=length_minutes)
-
     response.set_header('Content-Type', 'image/png')
-    start_epoch = time.mktime(start.timetuple())
-    return log.graph_png(start_epoch, length_minutes * 60)
+    return make_graph(request.query.length, request.query.end)
 
 @route('/set/update', method='post')
 def set_update():
@@ -121,9 +128,12 @@
     request.query.replace('end', end.strftime(DATE_FORMAT))
 
     urlparams = urllib.urlencode(request.query)
+    graphdata = encode_data(make_graph(request.query.length, request.query.end), 'image/png')
     return bottle.template('top', urlparams=urlparams,
                     end = end.strftime(DATE_FORMAT),
-                    length = minutes)
+                    length = minutes,
+                    graphwidth = config.GRAPH_WIDTH,
+                    graphdata = graphdata)
 
 @route('/debug')
 def debuglog():
diff -r 2caee09f41c4 -r c9b20d3d393a web/views/top.tpl
--- a/web/views/top.tpl	Wed May 20 00:03:53 2015 +0800
+++ b/web/views/top.tpl	Thu May 21 00:01:09 2015 +0800
@@ -2,6 +2,7 @@
 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
 <head>
 <title>Wort Temperature Log</title>
+<meta name="viewport" content="width=device-width">
 <style type="text/css"><!--
 span.no_selection {
     -webkit-user-select: none; // webkit (safari, chrome) browsers
@@ -19,7 +20,7 @@
 </head>
 <body>
 <form action="" method="get">
-<span class="no_selection"><input type="image" style="width: 1200px" src="graph.png?{{urlparams}}"/></span>
+<span class="no_selection"><input type="image" style="width: {{graphwidth}}" src="{{graphdata}}"/></span>
 <input type="hidden" name="length" value="{{length}}"/>
 <input type="hidden" name="end" value="{{end}}"/>
 <input type="hidden" name="zoom" value="yeah"/>