Skip to main content

gfxlcd is a handler for graphical lcds: ILI9328, SSD1306, NJU6450, touch panel: AD7843 @ Raspberry Pi.

Project description

What it is
===

Library for graphical LCDs for Python on Raspberry Pi. Creates a united interface for supported devices

Supported:

- ili9486 via SPI
- ili9325 via GPIO
- ssd1306 via SPI
- nju6450 via GPIO

And for touch panels:

- ad7843 via SPI, uses irq or not
- ad7846/xpt2046

Bonus

- HD44780 emulation (works with CharLCD)


On NJU and SSD uses buffer to keep current content as help for page operations.

Wiring is below

Demos are in demos directory


LCD initialization
===
## SSD1306
### SPI

from driver.ssd1306.spi import SPI
from driver.ssd1306.ssd1306 import SSD1306
drv = SPI()
o = SSD1306(128, 64, drv)
o.init()

If you want to set your own pins:

drv = SPI()
drv.pins = {
'RST': 13,
'DC': 6,
}
o = SSD1306(128, 64, drv)
o.init()

## NJU6450
### GPIO

from gfxlcd.driver.nju6450.gpio import GPIO
from gfxlcd.driver.nju6450.nju6450 import NJU6450
drv = GPIO()
o = NJU6450(122, 32, drv)
o.init()

Custom wiring:

from gfxlcd.driver.nju6450.gpio import GPIO
from gfxlcd.driver.nju6450.nju6450 import NJU6450
drv = GPIO()
drv.pins = {
'A0': 17,
'E1': 22,
'E2': 21,
'D0': 23,
'D1': 24,
'D2': 25,
'D3': 12,
'D4': 16,
'D5': 20,
'D6': 26,
'D7': 19,
'RST': 5,
}
o = NJU6450(122, 32, drv)
o.init()

## ILI9325
### GPIO

from gfxlcd.driver.ili9325.gpio import GPIO
from gfxlcd.driver.ili9325.ili9325 import ILI9325
drv = GPIO()
o = ILI9325(240, 320, drv)
o.init()

Custom pins:

from gfxlcd.driver.ili9325.gpio import GPIO
from gfxlcd.driver.ili9325.ili9325 import ILI9325
drv = GPIO()
drv.pins = {
'RS': 27,
'W': 17,
'DB8': 22,
'DB9': 23,
'DB10': 24,
'DB11': 5,
'DB12': 12,
'DB13': 16,
'DB14': 20,
'DB15': 21,
'RST': 25,
'LED': None,
'CS': None
}
o = ILI9325(240, 320, drv)
o.init()

## ILI9486
### SPI

from gfxlcd.driver.ili9486.spi import SPI
from gfxlcd.driver.ili9486.ili9486 import ILI9486
drv = SPI()
o = ILI9486(320, 480, drv)
o.rotation = 270
o.init()

Drawing functions
===
draw_pixel(x, y)

draw_line(from_x, from_y, to_x, to_y)

draw_rect(x1, y1, x2, y2)

draw_circle(x1, y1, radius)

draw_arc(x1, y1, radius, from_angle, to_angle

fill_rect(x1, y1, x2, y2)

draw_image(x, y, PIL.Image)

draw_text(x, y, text)

Colours
===
lcd.color = (r, g, b)

lcd.background_color = (r, g ,b)

lcd.threshold = 255 - for images a threshold between black and white (on monochrome)

lcd.transparency_color = [110, 57] #110 - color(s) that are skipped during drawing an image

Fonts
===
Font class implements Font abstract and is a class that has a dictionary with each char:

(..)
[0x3C, 0x66, 0x03, 0x03, 0x73, 0x66, 0x7C, 0x00], # U+0047 (G)
(..)

There is one font for now, 8x8 and named **Font8x8** and is used by default.

Touch panels
===

## AD7843

Constructor:

AD7843(width, height, (int_pin), (callback), (cs_pin))

Can be used with int_pin and cs_pin

def callback(position):
print('(x,y)', position)

touch = AD7843(240, 320, 26, callback, 17)
touch.init()

or without:

touch = AD7843(240, 320)
touch.init()

while True:
try:
time.sleep(0.05)
ret = touch.get_position()
if ret:
print(ret[0], ret[1])

except KeyboardInterrupt:
touch.close()

There is no automatic calibration. It must be done manually.

self.correction = {
'x': 364,
'y': 430,
'ratio_x': 14.35,
'ratio_y': 10.59
}

Wiring
===

## SSD1306
### SPI
SPI wiring + 2 additional pins. Defaults:

LCD Raspberry Pi
GND ----------- GND
+3.3V ----------- +3.3V
SCL ----------- G11
SDA ----------- G10
RST ----------- G13
D/C ----------- G6


## NJU6450
### GPIO
Default wiring:

LCD Raspberry Pi
1 (Vss) ------- GND
2 (Vdd) ------- +5V
3 (V0) ---[-\-] 10k
\--- GND
4 (A0) ---------------------- G17
5 (E1) ---------------------- G22
6 (E2) ---------------------- G21
7 (R/W) ------- GND
8 (D0) ---------------------- G23
9 (D1) ---------------------- G24
10 (D2) ---------------------- G25
11 (D3) ---------------------- G12
12 (D4) ---------------------- G16
13 (D5) ---------------------- G20
14 (D6) ---------------------- G26
15 (D7) ---------------------- G19
16 (RST) ------- +5V
17 (A) ------- +5V
18 (K) ------- GND

## ILI9325
### GPIO
Default:

TFT Raspberry Pi 2B

GND ------------------------ GND
Vcc ------------------------ 3.3
RS ------------------------ G27 (data[H]/cmd[L])
WR ------------------------ G17
RD ------------------------ 3.3 (never read from screen)
DB8 ------------------------ G22
DB9 ------------------------ G23
DB10 ------------------------ G24
DB11 ------------------------ G5
DB12 ------------------------ G12
DB13 ------------------------ G16
DB14 ------------------------ G20
DB15 ------------------------ G21
CS ------------------------ GND (always selected) (or connect to GPIO pin)
REST ------------------------ G25
LED_A ------------------------ 3.3 (can be connected to GPIO pin)

## ILI9486 (Waveshare)
### SPI
Default:

RPi Shield
G17 ----------------- TP_IRQ
G24 ----------------- RS
G25 ----------------- RST
G9 ----------------- LCD_CS
G7 ----------------- TP_CS


HD44780 emulation
===

This driver can work with CharLCD and emulate char LCD

ili_drv = ILIGPIO()
ili_drv.pins['LED'] = 6
ili_drv.pins['CS'] = 18
lcd = ILI9325(240, 320, ili_drv)
lcd.auto_flush = False
lcd.rotation = 0

drv = HD44780(lcd)
lcd = CharLCD(drv.width, drv.height, drv, 0, 0)
lcd.init()

lcd.write('-!Second blarg!')
lcd.write("-second line", 0, 1)
lcd.flush()


Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
gfxlcd-0.8.3-py3-none-any.whl (30.2 kB) Copy SHA256 hash SHA256 Wheel py3
gfxlcd-0.8.3.tar.gz (17.9 kB) Copy SHA256 hash SHA256 Source None

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN SignalFx SignalFx Supporter DigiCert DigiCert EV certificate StatusPage StatusPage Status page