class EightByEight:
disp = None
# Constructor
def __init__(self, address=0x70, debug=False):
if debug:
print "Initializing a new instance of LEDBackpack at 0x%02X" % address
self.disp = LEDBackpack(address=address, debug=debug)
# ===========================================================================
# A single row operations
# ===========================================================================
def writeRowRaw(self, charNumber, value):
"Sets a row of pixels using a raw 16-bit value"
if charNumber > 7:
return
# Set the appropriate row
self.disp.setBufferRow(charNumber, self.wrapValue(value))
def writeMatrix(self, mx, color=1):
"Sets a 8x8 matrix"
row = 0
for value in mx:
if row > 7:
return
self.disp.setBufferRow(row, self.wrapValue(value), False)
row += 1
self.disp.writeDisplay()
def wrapValue(self, value):
"A function to mock 8x8 LED bug (offset and flip)"
valueHI = value & 0xFF00
valueLO = value & 0x00FF
valueLO = ((valueLO << 1) & 0xFF) | (valueLO >> 7)
flip = 0x00
for i in range(8):
flip = flip | ((2 ** (7 - i)) if (valueLO & 2 ** i) else 0)
valueLO = flip & 0x00FF
return valueHI | valueLO
# ===========================================================================
# A single pixel operations
# ===========================================================================
def setPixel(self, x, y):
"Sets a single pixel"
if (x > 7) | (y > 7):
return
# Set the appropriate pixel
value = 2 ** x
buffer = self.disp.getBuffer()
self.disp.setBufferRow(y, buffer[y] | self.wrapValue(value))
def clearPixel(self, x, y):
"Sets a single pixel"
if (x > 7) | (y > 7):
return
# Set the appropriate pixel
value = ~(2 ** x) & 0xFF
buffer = self.disp.getBuffer()
self.disp.setBufferRow(y, buffer[y] & self.wrapValue(value))
def switchPixel(self, x, y):
"Sets a single pixel"
if (x > 7) | (y > 7):
return
# Set the appropriate pixel
value = 2 ** x
buffer = self.disp.getBuffer()
self.disp.setBufferRow(y, buffer[y] ^ self.wrapValue(value))
# ===========================================================================
#
# ===========================================================================
def clear(self):
"Clears the entire display"
self.disp.clear()
