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MicroPython PCD8544

A MicroPython library for the Philips PCD8544 84x48 monochrome LCD, used by the Nokia 5110 display.

Pinout

Example

Copy the file to your device, using ampy, webrepl or compiling and deploying. eg.

$ ampy put pcd8544.py

Basic Example

import pcd8544
from machine import Pin, SPI

spi = SPI(1)
spi.init(baudrate=2000000, polarity=0, phase=0)
cs = Pin(2)
dc = Pin(15)
rst = Pin(0)

# backlight on
bl = Pin(12, Pin.OUT, value=1)

lcd = pcd8544.PCD8544(spi, cs, dc, rst)

# test pattern (50% on)
lcd.data(bytearray([0x55, 0xAA] * 42 * 6))

# bitmap smiley (horzontal msb)
lcd.clear()
# draw 8x16 in bank 0 (rows 0..7)
lcd.position(0, 0)
lcd.data(bytearray(b'\xE0\x38\xE4\x22\xA2\xE1\xE1\x61\xE1\x21\xA2\xE2\xE4\x38\xE0\x00'))
# draw 8x16 in bank 1 (rows 8..15)
lcd.position(0, 1)
lcd.data(bytearray(b'\x03\x0C\x10\x21\x21\x41\x48\x48\x48\x49\x25\x21\x10\x0C\x03\x00'))

# toggle display, image persists in DDRAM
lcd.power_off()
lcd.power_on()

# nokia logo bitmap
lcd.clear()
lcd.data(bytearray(b'\x80\x00\x00\x80\x00\x00\x80\x00\x00\x80\x00\x00\x80\x00\x00\x80\x00\x00\x80\x80\x40\x40\x40\x80\x80\xC0\xC0\x40\xC0\xA0\xE0\xC0\xE0\xE0\xF0\xF0\xF8\xF8\xF8\xFC\xFC\xFE\xEE\xF4\xF0\xF0\x70\x30\x00\x80\x00\x00\x80\x00\x0C\x9C\x1C\x38\xB8\x38\x38\xB8\xF8\xF0\xF0\xF0\xF0\xF0\xF0\xF0\xF0\xF0\xF0\xF0\xF0\xF0\xF0\xF0\xF0\xF0\xF8\xF8\xF8\xF8\x88\x20\x8A\x20\x08\x22\x08\x00\x0A\x00\x00\x02\x80\x71\xBA\xDA\xFD\xDD\xED\xDE\xEE\xF7\xFF\xFB\xFD\xFD\xFE\xFF\x7F\x3F\x1F\x9F\x3F\x7F\x6F\x0F\xAF\x1F\xBF\x3E\x3C\x7A\x78\x70\x22\x88\xA0\x2A\x80\x08\x62\xE0\xE0\xF2\xF0\x58\xDA\xF8\xFC\x92\xFE\xFF\xFF\xD3\xFF\xFD\xF3\xE1\xF0\xF9\x7F\xBF\x3F\x8F\x2F\x4F\xAF\x0F\x4F\xA7\x0F\xAF\x87\x2F\x82\x80\x20\xC0\x80\x80\x50\x40\xC4\xD0\xA0\xE8\xE4\xEA\xFF\xFB\xFD\xFF\xFF\xFF\xFF\xFF\xEF\x4F\x27\x53\xA8\x54\x29\x4A\xB5\x82\xAC\xA1\x8A\xB6\x50\x4D\x32\xA4\x4A\xB4\xA9\x4A\x52\xB4\xAA\x45\xA8\xDA\x22\xAC\xD2\x2A\x52\xA8\x52\x4C\xB0\xAD\x43\x5B\xB3\x45\xA8\x5B\xA3\xAB\x55\xA8\x52\x54\xA9\x56\xA8\x45\xBA\xA4\x49\x5A\xA2\x54\xAA\x52\xFE\xFF\xFF\xFE\xFD\xFF\xFF\xFF\xFE\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\xFF\x7F\xFF\xFE\xBF\x7F\xBF\xBF\xFF\xDF\xBF\x5F\xDF\x7F\xDF\x7F\xDF\xAF\x7F\xEE\x8E\xF1\x6E\x99\xF7\x6A\xDD\xB2\x6E\xD5\x7A\xD7\xAC\x75\xDB\x6D\xD5\x7A\xD7\xAC\x7B\xE5\xDE\xA9\x77\xDA\xB5\xEE\x59\xB6\xEB\xDD\xB6\x69\xD6\xBF\xE8\x55\xEF\xB9\xD6\xED\xB5\x5B\xAB\xFF\xFD\xF7\xFF\x01\x01\x01\x01\xE1\xC1\x81\x03\x05\x0F\x1D\x2F\x7E\x01\x00\x01\x01\xFF\xFE\x03\x01\x01\x00\xF1\xF0\xF1\x71\xF1\xF1\xB1\xF1\x01\x01\x01\x03\xFE\xFF\x01\x01\x01\x01\xBE\x1B\x0D\x07\x03\x41\xE1\xF1\xF9\x6D\xFF\xFF\x00\x01\x01\x01\xFF\xFF\xEB\x3E\x0D\x03\x01\x41\x71\x70\x41\x01\x03\x0E\x3B\xEF\xFE\xFB\xEE\x7D\xF7\xFF\xFF\xFF\xFF\xFE\xFF\xF0\xF0\xF0\xF0\xFF\xFF\xFF\xFF\xFE\xFC\xF8\xF0\xF0\xF0\xF0\xF0\xF0\xFF\xFF\xF8\xF0\xF0\xF0\xF1\xF1\xF1\xF1\xF1\xF1\xF1\xF1\xF0\xF0\xF0\xF8\xFF\xFF\xF0\xF0\xF0\xF0\xFF\xFF\xFE\xFC\xF8\xF0\xF0\xF1\xF3\xF7\xFF\xFF\xF0\xF0\xF0\xF0\xFF\xF3\xF0\xF0\xF0\xFC\xFC\xFC\xFC\xFC\xFC\xFC\xFC\xF0\xF0\xF0\xF3\xFF\xFF\xFF\xFF\xFF'))

lcd.invert(True)
lcd.invert(False)

lcd.reset()
lcd.init()

# swtich to vertical addressing
lcd.init(horizontal=False)

# adjust contrast, bias and temp
lcd.contrast(0x1f, pcd8544.BIAS_1_40, pcd8544.TEMP_COEFF_0)
lcd.contrast(0x3f, pcd8544.BIAS_1_48, pcd8544.TEMP_COEFF_0)
lcd.contrast(0x3c, pcd8544.BIAS_1_40, pcd8544.TEMP_COEFF_0)
lcd.contrast(0x42, pcd8544.BIAS_1_48, pcd8544.TEMP_COEFF_0)
lcd.contrast(0x3f, pcd8544.BIAS_1_40, pcd8544.TEMP_COEFF_2)

See /examples for more.

Addressing

Each animation frame represents 1 of 504 bytes written to the DDRAM. lcd.data(bytearray(b'\xFF'))

In horizontal mode you can use framebuf with MONO_VLSB format. Vertical mode does not have a compatible framebuf format.

Horizontal

Vertical

See /examples/addressing for more details.

Parts

• WeMos D1 Mini $4.00 USD
• Nokia 5110 LCD Display $2.00 USD

Connections

Links

• WeMos D1 Mini
• micropython.org
• Adafruit Ampy
• PCD8544 Datasheet

License

Licensed under the MIT License.