Notes

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# by Texy and the raspberry pi community
# bitmap display routine by POSitality
# this version using the SPI pins, but not
# using spidev
# 19/1/2013

import time
import wiringpi

ROWS = 6
COLUMNS = 14
PIXELS_PER_ROW = 6
ON = 1
OFF = 0
CONTRAST = 0xba
#gpio's :
SCE = 10 # gpio pin 13 = wiringpi no. 2
SCLK = 14 # gpio pin 18 = wiringpi no. 5
DIN = 12 # gpio pin 16 = wiringpi no. 4
DC = 3 # gpio pin 15 = wiringpi no. 3
RST = 0 # gpio pin 11 = wiringpi no. 0
LED = 1 # gpio pin 12 = wiringpi no. 1

FONT = {
' ': [0x00, 0x00, 0x00, 0x00, 0x00],
'!': [0x00, 0x00, 0x5f, 0x00, 0x00],
'"': [0x00, 0x07, 0x00, 0x07, 0x00],
'#': [0x14, 0x7f, 0x14, 0x7f, 0x14],
'$': [0x24, 0x2a, 0x7f, 0x2a, 0x12],
'%': [0x23, 0x13, 0x08, 0x64, 0x62],
'&': [0x36, 0x49, 0x55, 0x22, 0x50],
"'": [0x00, 0x05, 0x03, 0x00, 0x00],
'(': [0x00, 0x1c, 0x22, 0x41, 0x00],
')': [0x00, 0x41, 0x22, 0x1c, 0x00],
'*': [0x14, 0x08, 0x3e, 0x08, 0x14],
'+': [0x08, 0x08, 0x3e, 0x08, 0x08],
',': [0x00, 0x50, 0x30, 0x00, 0x00],
'-': [0x08, 0x08, 0x08, 0x08, 0x08],
'.': [0x00, 0x60, 0x60, 0x00, 0x00],
'/': [0x20, 0x10, 0x08, 0x04, 0x02],
'0': [0x3e, 0x51, 0x49, 0x45, 0x3e],
'1': [0x00, 0x42, 0x7f, 0x40, 0x00],
'2': [0x42, 0x61, 0x51, 0x49, 0x46],
'3': [0x21, 0x41, 0x45, 0x4b, 0x31],
'4': [0x18, 0x14, 0x12, 0x7f, 0x10],
'5': [0x27, 0x45, 0x45, 0x45, 0x39],
'6': [0x3c, 0x4a, 0x49, 0x49, 0x30],
'7': [0x01, 0x71, 0x09, 0x05, 0x03],
'8': [0x36, 0x49, 0x49, 0x49, 0x36],
'9': [0x06, 0x49, 0x49, 0x29, 0x1e],
':': [0x00, 0x36, 0x36, 0x00, 0x00],
';': [0x00, 0x56, 0x36, 0x00, 0x00],
'<': [0x08, 0x14, 0x22, 0x41, 0x00],
'=': [0x14, 0x14, 0x14, 0x14, 0x14],
'>': [0x00, 0x41, 0x22, 0x14, 0x08],
'?': [0x02, 0x01, 0x51, 0x09, 0x06],
'@': [0x32, 0x49, 0x79, 0x41, 0x3e],
'A': [0x7e, 0x11, 0x11, 0x11, 0x7e],
'B': [0x7f, 0x49, 0x49, 0x49, 0x36],
'C': [0x3e, 0x41, 0x41, 0x41, 0x22],
'D': [0x7f, 0x41, 0x41, 0x22, 0x1c],
'E': [0x7f, 0x49, 0x49, 0x49, 0x41],
'F': [0x7f, 0x09, 0x09, 0x09, 0x01],
'G': [0x3e, 0x41, 0x49, 0x49, 0x7a],
'H': [0x7f, 0x08, 0x08, 0x08, 0x7f],
'I': [0x00, 0x41, 0x7f, 0x41, 0x00],
'J': [0x20, 0x40, 0x41, 0x3f, 0x01],
'K': [0x7f, 0x08, 0x14, 0x22, 0x41],
'L': [0x7f, 0x40, 0x40, 0x40, 0x40],
'M': [0x7f, 0x02, 0x0c, 0x02, 0x7f],
'N': [0x7f, 0x04, 0x08, 0x10, 0x7f],
'O': [0x3e, 0x41, 0x41, 0x41, 0x3e],
'P': [0x7f, 0x09, 0x09, 0x09, 0x06],
'Q': [0x3e, 0x41, 0x51, 0x21, 0x5e],
'R': [0x7f, 0x09, 0x19, 0x29, 0x46],
'S': [0x46, 0x49, 0x49, 0x49, 0x31],
'T': [0x01, 0x01, 0x7f, 0x01, 0x01],
'U': [0x3f, 0x40, 0x40, 0x40, 0x3f],
'V': [0x1f, 0x20, 0x40, 0x20, 0x1f],
'W': [0x3f, 0x40, 0x38, 0x40, 0x3f],
'X': [0x63, 0x14, 0x08, 0x14, 0x63],
'Y': [0x07, 0x08, 0x70, 0x08, 0x07],
'Z': [0x61, 0x51, 0x49, 0x45, 0x43],
'[': [0x00, 0x7f, 0x41, 0x41, 0x00],
'': [0x02, 0x04, 0x08, 0x10, 0x20],
']': [0x00, 0x41, 0x41, 0x7f, 0x00],
'^': [0x04, 0x02, 0x01, 0x02, 0x04],
'_': [0x40, 0x40, 0x40, 0x40, 0x40],
'`': [0x00, 0x01, 0x02, 0x04, 0x00],
'a': [0x20, 0x54, 0x54, 0x54, 0x78],
'b': [0x7f, 0x48, 0x44, 0x44, 0x38],
'c': [0x38, 0x44, 0x44, 0x44, 0x20],
'd': [0x38, 0x44, 0x44, 0x48, 0x7f],
'e': [0x38, 0x54, 0x54, 0x54, 0x18],
'f': [0x08, 0x7e, 0x09, 0x01, 0x02],
'g': [0x0c, 0x52, 0x52, 0x52, 0x3e],
'h': [0x7f, 0x08, 0x04, 0x04, 0x78],
'i': [0x00, 0x44, 0x7d, 0x40, 0x00],
'j': [0x20, 0x40, 0x44, 0x3d, 0x00],
'k': [0x7f, 0x10, 0x28, 0x44, 0x00],
'l': [0x00, 0x41, 0x7f, 0x40, 0x00],
'm': [0x7c, 0x04, 0x18, 0x04, 0x78],
'n': [0x7c, 0x08, 0x04, 0x04, 0x78],
'o': [0x38, 0x44, 0x44, 0x44, 0x38],
'p': [0x7c, 0x14, 0x14, 0x14, 0x08],
'q': [0x08, 0x14, 0x14, 0x18, 0x7c],
'r': [0x7c, 0x08, 0x04, 0x04, 0x08],
's': [0x48, 0x54, 0x54, 0x54, 0x20],
't': [0x04, 0x3f, 0x44, 0x40, 0x20],
'u': [0x3c, 0x40, 0x40, 0x20, 0x7c],
'v': [0x1c, 0x20, 0x40, 0x20, 0x1c],
'w': [0x3c, 0x40, 0x30, 0x40, 0x3c],
'x': [0x44, 0x28, 0x10, 0x28, 0x44],
'y': [0x0c, 0x50, 0x50, 0x50, 0x3c],
'z': [0x44, 0x64, 0x54, 0x4c, 0x44],
'{': [0x00, 0x08, 0x36, 0x41, 0x00],
'|': [0x00, 0x00, 0x7f, 0x00, 0x00],
'}': [0x00, 0x41, 0x36, 0x08, 0x00],
'~': [0x10, 0x08, 0x08, 0x10, 0x08],
'x7f': [0x00, 0x7e, 0x42, 0x42, 0x7e],
}

ORIGINAL_CUSTOM = FONT['x7f']

bitreverse =[
0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
]

def bit_reverse(value, width=8):
result = 0
for _ in xrange(width):
result = (result << 1) | (value & 1)
value >>= 1

return result

BITREVERSE = map(bit_reverse, xrange(256))

def setup():
# Set pin directions.
wiringpi.wiringPiSetup()
#Â Â wiringpi.wiringPiGpioMode(ON)
for pin in [DIN, SCLK, DC, RST, SCE]:
wiringpi.pinMode(pin, ON)

wiringpi.pinMode(LED,2)
wiringpi.pwmWrite(LED,128)

def SPI(value):
# data = DIN
# clock = SCLK
# MSB first
for i in reversed(xrange(8)):
wiringpi.digitalWrite(DIN, (value >> i) & 1)
wiringpi.digitalWrite(SCLK, ON)
wiringpi.digitalWrite(SCLK, OFF)

def lcd_cmd(value):
wiringpi.digitalWrite(DC, OFF)
SPI(value)

def lcd_data(value):
wiringpi.digitalWrite(DC, ON)
SPI(value)

def gotoxy(x, y):
lcd_cmd(x + 128)
lcd_cmd(y + 64)

def cls():
gotoxy(0, 0)
for _ in xrange(ROWS * COLUMNS * PIXELS_PER_ROW):
lcd_data(0)

def begin(contrast):
setup()
# Toggle RST low to reset.
wiringpi.digitalWrite(SCE, OFF)
wiringpi.digitalWrite(RST, OFF)
wiringpi.digitalWrite(LED, ON)
time.sleep(0.100)
wiringpi.digitalWrite(RST, ON)
# Extended mode, bias, vop, basic mode, non-inverted display.
for value in [0x21, 0x14, contrast, 0x20, 0x0c]:
lcd_cmd(value) # extended modeÂ
cls()

def init():
begin(CONTRAST) # contrast value

def led(led_value):
wiringpi.digitalWrite(LED, led_value)

def load_bitmap(file):
gotoxy(0,0)
f = open(file,'r')
for x in range(6):
for y in range(84):
f.seek(0x3e + y*8 + x)
b = ord(f.read(1))
rev = bitreverse[b]
lcd_data(rev ^ 0xff)
f.close()

def show_custom(font=FONT):
display_char('x7f', font)

def define_custom(values):
FONT['x7f'] = values

def restore_custom():
define_custom(ORIGINAL_CUSTOM)

def alt_custom():
define_custom([0x00, 0x50, 0x3C, 0x52, 0x44])

def pi_custom():
define_custom([0x19, 0x25, 0x5A, 0x25, 0x19])

def display_char(char, font=FONT):
try:
for value in font[char]:
lcd_data(value)

lcd_data(0) # Space inbetween characters.
except KeyError:
pass # Ignore undefined characters.

def text(string, font=FONT):
for char in string:
display_char(char, font)

def gotorc(r, c):
lcd_cmd(c * 6 + 128)
lcd_cmd(r + 64)

def centre_word(r, word):
gotorc(r, max(0, (COLUMNS - len(word)) // 2))
text(word)

def main():
start, end = 32, 116
print 'LCD Goruntu Testi: ASCII %d to %d' % (start, end)
start_time = time.time()
init()
led(1)
centre_word(1,'www.')
centre_owrd(2,'raspberrypi')
centre_word(3,'gen.tr')
#load_bitmap('r.bmp')
finish_time = time.time()
end - start, finish_time - start_time
)

if __name__ == '__main__':
main()