Merge pull request #50 from humrochagf/master

Sprint at PythonBrasil 10

CONTRIBUTORS.txt

@@ -15,3 +15,8 @@ Lucas Vido (Vido)
 Paulo R. O. Castro (brk00)
 Thiago M. Sanches
 Valder Gallo (valdergallo)
+Humberto Rocha (humrochagf)
+Diego Guimaraes (diegoguimaraes)
+Héctor Velarde (hvelarde)
+Theo A. Monteiro (theoamonteiro)
+Davi Garcia (davivcgarcia)

pingo/examples/parts/7seg_demo.py

@@ -0,0 +1,28 @@
+""" Seven segment display demo using the Garoa Dojo Shield """
+
+from time import sleep
+from pingo import OUT, detect, parts
+
+INTERVAL = 0.3
+
+ard = detect.MyBoard()
+
+display_pins = [ard.pins[i] for i in range(8, 14)] + [7]
+
+for pin in display_pins:
+    pin.mode = OUT
+
+seg_display = parts.led.SevenSegments(*display_pins)
+
+for num in range(16):
+    seg_display.digit = num
+    print('Current digit: {:x}'.format(seg_display.digit))
+    sleep(INTERVAL)
+
+for i in range(3):
+    seg_display.off()
+    sleep(INTERVAL)
+    seg_display.on()
+    sleep(INTERVAL)
+
+seg_display.off()

pingo/parts/led.py

@@ -3,13 +3,16 @@
 import time
 import threading
 
+
 class Led(object):
     """A single LED"""
 
     def __init__(self, pin, lit_state=pingo.HIGH):
-        """Set lit_state to pingo.LOW to turn on led by bringing cathode to low state.
+        """Set lit_state to pingo.LOW to turn on led by bringing
+           cathode to low state.
 
-        :param lit_state: use pingo.HI for anode control, pingo.LOW for cathode control
+        :param lit_state: use pingo.HI for anode control, pingo.LOW
+                          for cathode control
         """
 
         pin.mode = pingo.OUT
@@ -89,4 +92,63 @@ def run(self):
                 time.sleep(self.off_delay)
         else:
             self.led.off()
-            self.active = False
+            self.active = False
+
+
+DIGIT_MAP = {
+    0: '1111110',
+    1: '0110000',
+    2: '1101101',
+    3: '1111001',
+    4: '0110011',
+    5: '1011011',
+    6: '1011111',
+    7: '1110000',
+    8: '1111111',
+    9: '1111011',
+    10: '1110111',
+    11: '0011111',
+    12: '1001110',
+    13: '0111101',
+    14: '1001111',
+    15: '1000111'
+}
+
+
+class SevenSegments(object):
+
+    def __init__(self, pin_a, pin_b, pin_c, pin_d,
+                 pin_e, pin_f, pin_g, pin_dp=None,
+                 lit_state=pingo.HIGH):
+        self._leds = [Led(pin_a, lit_state), Led(pin_b, lit_state),
+                      Led(pin_c, lit_state), Led(pin_d, lit_state),
+                      Led(pin_e, lit_state), Led(pin_f, lit_state),
+                      Led(pin_g, lit_state)]
+
+        if pin_dp:
+            self._leds.append(Led(pin_dp, lit_state))
+
+        self._digit = 0
+
+    def _configure(self, pattern):
+        for segment, state in zip(self._leds, pattern):
+            if state == '1':
+                segment.on()
+            else:
+                segment.off()
+
+    @property
+    def digit(self):
+        return self._digit
+
+    @digit.setter
+    def digit(self, digit):
+        self._digit = digit
+        pattern = DIGIT_MAP[digit]
+        self._configure(pattern)
+
+    def on(self):
+        self.digit = self._digit
+
+    def off(self):
+        self._configure('0'*7)