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# coding:utf-8
import time
import Adafruit_GPIO as GPIO
import Adafruit_GPIO.SPI as SPI
LCDWIDTH = 84
LCDHEIGHT = 48
ROWPIXELS = LCDHEIGHT//6
PCD8544_POWERDOWN = 0x04
PCD8544_ENTRYMODE = 0x02
PCD8544_EXTENDEDINSTRUCTION = 0x01
PCD8544_DISPLAYBLANK = 0x0
PCD8544_DISPLAYNORMAL = 0x4
PCD8544_DISPLAYALLON = 0x1
PCD8544_DISPLAYINVERTED = 0x5
PCD8544_FUNCTIONSET = 0x20
PCD8544_DISPLAYCONTROL = 0x08
PCD8544_SETYADDR = 0x40
PCD8544_SETXADDR = 0x80
PCD8544_SETTEMP = 0x04
PCD8544_SETBIAS = 0x10
PCD8544_SETVOP = 0x80
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],
}
X = 13
Y = 5
class PCD8544(object):
"""Nokia 5110/3310 PCD8544-based LCD display."""
def __init__(self, dc, rst, sclk=None, din=None, cs=None, gpio=None, spi=None, vcc=None, bl=None):
self._sclk = sclk
self._din = din
self._dc = dc
self._cs = cs
self._rst = rst
self._gpio = gpio
self._spi = spi
self._buffer = [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC, 0xFC, 0xFE, 0xFF, 0xFC, 0xE0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF0, 0xF0, 0xE0, 0xE0, 0xC0, 0x80, 0xC0, 0xFC, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x3F, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0F, 0x1F, 0x3F, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xE7, 0xC7, 0xC7, 0x87, 0x8F, 0x9F, 0x9F, 0xFF, 0xFF, 0xFF, 0xC1, 0xC0, 0xE0, 0xFC, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC, 0xFC, 0xFC, 0xFC, 0xFE, 0xFE, 0xFE, 0xFC, 0xFC, 0xF8, 0xF8, 0xF0, 0xE0, 0xC0, 0xC0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xC0, 0xE0, 0xF1, 0xFB, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x1F, 0x0F, 0x0F, 0x87, 0xE7, 0xFF, 0xFF, 0xFF, 0x1F, 0x1F, 0x3F, 0xF9, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xF8, 0xFD, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x3F, 0x0F, 0x07, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0xFE, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFE, 0x7E, 0x3F, 0x3F, 0x0F, 0x1F, 0xFF, 0xFF, 0xFF, 0xFC, 0xF0, 0xE0, 0xF1, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFC, 0xF0, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x0F, 0x1F, 0x3F, 0x7F, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0x7F, 0x7F, 0x1F, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 ]
if self._gpio is None:
self._gpio = GPIO.get_platform_gpio()
self._gpio.setup(vcc, GPIO.OUT)
self._gpio.setup(bl, GPIO.OUT)
self._gpio.output(vcc, 1)
self._gpio.output(bl, 1)
if self._rst is not None:
self._gpio.setup(self._rst, GPIO.OUT)
# Default to bit bang SPI.
if self._spi is None:
self._spi = SPI.BitBang(self._gpio, self._sclk, self._din, None, self._cs)
# Set pin outputs.
self._gpio.setup(self._dc, GPIO.OUT)
# Initialize buffer to Adafruit logo.
def command(self, c):
"""Send command byte to display."""
# DC pin low signals command byte.
self._gpio.set_low(self._dc)
self._spi.write([c])
def extended_command(self, c):
"""Send a command in extended mode"""
# Set extended command mode
self.command(PCD8544_FUNCTIONSET | PCD8544_EXTENDEDINSTRUCTION)
self.command(c)
# Set normal display mode.
self.command(PCD8544_FUNCTIONSET)
self.command(PCD8544_DISPLAYCONTROL | PCD8544_DISPLAYNORMAL)
def begin(self, contrast=40, bias=4):
"""Initialize display."""
self.reset()
# Set LCD bias.
self.set_bias(bias)
self.set_contrast(contrast)
def reset(self):
"""Reset the display"""
if self._rst is not None:
# Toggle RST low to reset.
self._gpio.set_low(self._rst)
time.sleep(0.1)
self._gpio.set_high(self._rst)
def display(self):
"""Write display buffer to physical display."""
# TODO: Consider support for partial updates like Arduino library.
# Reset to position zero.
self.command(PCD8544_SETYADDR)
self.command(PCD8544_SETXADDR)
# Write the buffer.
self._gpio.set_high(self._dc)
self._spi.write(self._buffer)
def clear(self):
"""Clear contents of image buffer."""
self._buffer = [0] * (LCDWIDTH * LCDHEIGHT // 8)
def set_contrast(self, contrast):
"""Set contrast to specified value (should be 0-127)."""
contrast = max(0, min(contrast, 0x7f)) # Clamp to values 0-0x7f
self.extended_command(PCD8544_SETVOP | contrast)
def set_bias(self, bias):
"""Set bias"""
self.extended_command(PCD8544_SETBIAS | bias)
def draw_str(self, y, s):
"""修改显示数据,y 为第几行,s 为要显示的数据"""
if (y >= Y ) or (y < 0):
return False
x = 0
for c in s[0:14]:
try:
self._buffer[y*84+x*6: y*84+x*6 + 6] = FONT[c] + [0]
except KeyError:
pass
x += 1
def draw_char(self, x, y):
pass
def quit(self):
self._gpio.cleanup()
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