circuitpython/examples/lcd.py

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# 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