Improve scan UI, slightly

btscan/main.py

@@ -14,30 +14,44 @@ from tilda import Buttons
 from time import sleep
 
 btrestore = False
-
+duration = 10
 status_height = 20
 
 ugfx.init()
 ugfx.clear()
 ugfx.set_default_font(ugfx.FONT_FIXED)
 
-ugfx.Label(5, 180, 240, 15, "Press A to scan, MENU to exit")
-ugfx.Label(5, 200, 240, 15, "Scan requires ~10 seconds")
+def instructions(duration):
+    ugfx.Label(5, 180, 240, 30, "Press A to start, B to change scan length or MENU to exit")
+    ugfx.Label(5, 210, 240, 15, "Scan requires ~{0} seconds".format(duration))
+
 if not sim800.btison():
     sim800.btpoweron()
     btrestore = True
 
+instructions(duration)
 # while (not Buttons.is_pressed(Buttons.BTN_A)) and (not Buttons.is_pressed(Buttons.BTN_B)) and (not Buttons.is_pressed(Buttons.BTN_Menu)):
 while not Buttons.is_pressed(Buttons.BTN_Menu):
-    if not Buttons.is_pressed(Buttons.BTN_A):
+    a = Buttons.is_pressed(Buttons.BTN_A)
+    b = Buttons.is_pressed(Buttons.BTN_B)
+    if not a and not  b:
         ugfx.poll()
         continue
 
+    if b:
+        duration = duration + 5
+        if duration > 60:
+            duration = 5
+        ugfx.clear()
+        instructions(duration)
+        continue
+
     ugfx.clear()
 
     np.display([0,0])
     np.display([0x000099, 0x000099])
-    devs = sim800.btscan(15000)
+    devs = sim800.btscan(duration*1000)
+    np.display([0x00, 0x00])
     
     if len(devs) == 0:
         ugfx.Label(0, 0, 240, 25, "No devices found")
@@ -47,17 +61,14 @@ while not Buttons.is_pressed(Buttons.BTN_Menu):
     else:
         if type(devs[0]) == int: 
             devs = [devs]
-        print(devs)
 
         y = 0
         for dev in devs[:20]:
-            print(dev)
             ugfx.Label(0, y, 240, 25, "{3}dB {1}".format(*dev))
             y += status_height
-        
-    
-    np.display([0x00, 0x00])
-    
+    instructions(duration)
+            
+## App quitting... 
 if btrestore:
     sim800.btpoweroff()