Add some example scripts for pyboard (some can run on PC).

examples/lcd.py

@@ -0,0 +1,36 @@
+# LCD testing object for PC
+# uses double buffering
+class LCD:
+    def __init__(self, width, height):
+        self.width = width
+        self.height = height
+        self.buf1 = [[0 for x in range(self.width)] for y in range(self.height)]
+        self.buf2 = [[0 for x in range(self.width)] for y in range(self.height)]
+
+    def clear(self):
+        for y in range(self.height):
+            for x in range(self.width):
+                self.buf1[y][x] = self.buf2[y][x] = 0
+
+    def show(self):
+        print('') # blank line to separate frames
+        for y in range(self.height):
+            for x in range(self.width):
+                self.buf1[y][x] = self.buf2[y][x]
+        for y in range(self.height):
+            row = ''.join(['*' if self.buf1[y][x] else ' ' for x in range(self.width)])
+            print(row)
+
+    def get(self, x, y):
+        if 0 <= x < self.width and 0 <= y < self.height:
+            return self.buf1[y][x]
+        else:
+            return 0
+
+    def reset(self, x, y):
+        if 0 <= x < self.width and 0 <= y < self.height:
+            self.buf2[y][x] = 0
+
+    def set(self, x, y):
+        if 0 <= x < self.width and 0 <= y < self.height:
+            self.buf2[y][x] = 1