class SevenSegment:
disp = None
# Hexadecimal character lookup table (row 1 = 0..9, row 2 = A..F)
digits = [ 0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F, \
0x77, 0x7C, 0x39, 0x5E, 0x79, 0x71 ]
# 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)
def writeDigitRaw(self, charNumber, value):
"Sets a digit using the raw 16-bit value"
if (charNumber > 7):
return
# Set the appropriate digit
self.disp.setBufferRow(charNumber, value)
def writeDigit(self, charNumber, value, dot=False):
"Sets a single decimal or hexademical value (0..9 and A..F)"
if (charNumber > 7):
return
if (value > 0xF):
return
# Set the appropriate digit
self.disp.setBufferRow(charNumber, self.digits[value] | (dot << 7))
def setColon(self, state=True):
"Enables or disables the colon character"
# Warning: This function assumes that the colon is character '2',
# which is the case on 4 char displays, but may need to be modified
# if another display type is used
if (state):
self.disp.setBufferRow(2, 0xFFFF)
else:
self.disp.setBufferRow(2, 0)
# Enabling/disabling small dots
def writeDot(self, charNumber, dot):
if charNumber > 4:
return
current = self.disp.getBufferRow(charNumber)
#if dot:
self.disp.setBufferRow(charNumber, current | (dot << 7))
class SevenSegment:
disp = None
# Hexadecimal character lookup table (row 1 = 0..9, row 2 = A..F)
digits = [ 0x3F, 0x06, 0x5B, 0x4F, 0x66, 0x6D, 0x7D, 0x07, 0x7F, 0x6F, \
0x77, 0x7C, 0x39, 0x5E, 0x79, 0x71 ]
# 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)
def writeDigitRaw(self, charNumber, value):
"Sets a digit using the raw 16-bit value"
if (charNumber > 7):
return
# Set the appropriate digit
self.disp.setBufferRow(charNumber, value)
def writeDigit(self, charNumber, value, dot=False):
"Sets a single decimal or hexademical value (0..9 and A..F)"
if (charNumber > 7):
return
if (value > 0xF):
return
# Set the appropriate digit
self.disp.setBufferRow(charNumber, self.digits[value] | (dot << 7))
def setColon(self, state=True):
"Enables or disables the colon character"
# Warning: This function assumes that the colon is character '2',
# which is the case on 4 char displays, but may need to be modified
# if another display type is used
if (state):
self.disp.setBufferRow(2, 0xFFFF)
else:
self.disp.setBufferRow(2, 0)
# Enabling/disabling small dots
def writeDot(self, charNumber, dot):
if charNumber > 4:
return
current = self.disp.getBufferRow(charNumber)
#if dot:
self.disp.setBufferRow(charNumber, current | (dot << 7))
class Bargraph:
disp = None
LED_OFF = 0
LED_RED = 1
LED_GREEN = 2
LED_YELLOW = 3
# Constructor
def __init__(self, address=0x70, debug=False):
self.debug = debug
if self.debug:
print "Initializing a new instance of LEDBackpack at 0x%02X" % address
self.disp = LEDBackpack(address=address, debug=debug)
def setLed(self, bar, color):
if bar > 24:
return
if color > 3:
return
if bar < 12:
c = bar / 4
else:
c = (bar - 12) / 4
a = bar % 4;
if bar >= 12:
a += 4;
if self.debug:
print "Ano = %d Cath %d" % (a, c)
bufRow = self.disp.getBufferRow(c) & ~((1 << a) | (1 << (a+8))) # turn off the LED
if color == self.LED_RED:
self.disp.setBufferRow(c, bufRow | (1 << a))
elif color == self.LED_YELLOW:
self.disp.setBufferRow(c, bufRow | (1 << a) | (1 << (a+8)))
elif color == self.LED_GREEN:
self.disp.setBufferRow(c, bufRow | 1 << (a+8))
