import serial

import struct

#port = serial.Serial('/dev/ttyS0')

#outputStr = struct.pack('BBB',0xaa,6,255)

#port.write(outputStr)

#port.close()

CURSORSTYLE_NO = 0

CURSORSTYLE_SOLID = 1

CURSORSTYLE_FLASH_BLOCK = 2

CURSORSTYLE_SOLID_UL = 3

CURSORSTYLE_FLASH_UL = 4

def write(data):

print hexdump(data,16)

def hexdump(src, length=8):

result = []

digits = 4 if isinstance(src, unicode) else 2

for i in xrange(0, len(src), length):

s = src[i:i+length]

hexa = b' '.join(["%0*X" % (digits, ord(x)) for x in s])

text = b''.join([x if 0x20 <= ord(x) < 0x7F else b'.' for x in s])

result.append( b"%04X %-*s %s" % (i, length*(digits + 1), hexa, text) )

return b'\n'.join(result)

def limit(value,min,max):

if value > max:

value = max

if value < min:

value = min

return value

class TextStar:

def __init__(self,port,baud):

##Initialise Serial Port Here

self.port = serial.Serial(port, baud,timeout=0.5)

print "Serial Port:", port, "\nBaud Rate:", baud

def write(self,data):

write(data)

self.port.write(data)

def read(self):

return self.port.read()

def CursorLeft(self):

self.write(struct.pack('B',8))

def CursorForward(self):

self.write(struct.pack('B',9))

def CursorDown(self):

self.write(struct.pack('B',10))

def CursorUp(self):

self.write(struct.pack('B',11))

def Clear(self):

self.write(struct.pack('B',12))

def CarriageReturn(self):

self.write(struct.pack('B',13))

def Delete(self):

self.write(struct.pack('B',127))

def UncappedBarGraph(self,width,percent):

self.write(struct.pack('BBBB',254,66,int(width),int(limit(percent,0,100))))

def CursorStyle(self,style):

self.write(struct.pack('BBB',254,67,int(style)))

def DefineCustomCharacter(self,ch,b1,b2,b3,b4,b5,b6,b7,b8):

self.write(struct.pack('BBBBBBBBBBB',254,68,ch,b1,b2,b3,b4,b5,b6,b7,b8))

def GoToLine(self,line):

self.write(struct.pack('BBB',254,71,int(line)))

def CursorHome(self):

self.write(struct.pack('BB',254,72))

def SendKeyStates(self):

self.write(struct.pack('BB',254,75))

def MoveToLineStart(self):

self.write(struct.pack('BB',254,76))

def ScrollWindow(self,dir):

self.write(struct.pack('BBB',254,79,int(dir)))

def PositionCursor(self,l,c):

self.write(struct.pack('BBBB',254,80,int(l),int(c)))

def ResetScreen(self):

self.write(struct.pack('BB',254,83))

def ClearScreen(self):

self.write(struct.pack('BB',254,83))

def VersionDisplay(self):

self.write(struct.pack('BB',254,86))

def CappedBarGraph(self,width,percent):

self.write(struct.pack('BBBB',254,98,int(width),int(limit(percent,0,100))))

def DefineKeys(self,key_no,code):

self.write(struct.pack('BBBB',254,107,int(key_no),int(code)))

def SendVersion(self):

self.write(struct.pack('BB',254,118))

if __name__ == "__main__":

ts = TextStar('/dev/ttyACM0',9600)

#ts.CursorLeft()

#ts.UncappedBarGraph(0x31,0xaa)

#ts.DefineCustomCharacter(1,0x31,101,102,103,104,105,106,107)

#ts.ScrollWindow(1)

ts.ResetScreen()

ts.write("Hello World")

ts.GoToLine(2)

ts.write("Hi two")