用到的第三方库的官方文档：Introduction — Luma.LCD: Display drivers for PCD8544, ST7735, ST7789, HT1621, UC1701X, ST7567, ILI9341, ILI9486, HD44780 2.9.0 documentation
https://luma-lcd.readthedocs.io/en/latest/intro.html
支持的IC驱动有：PCD8544、ST7735、ST7789、HT1621、UC1701X、ILI9341、HD44780
屏幕参数：1.8寸 120X160 RGB_TFT
安装库：
代码语言：javascript复制sudo -H pip install --upgrade luma.lcd安装依赖：
如果您使用的是 Raspbian Stretch 或 Raspberry Pi OS (Buster)，您应该能够使用以下命令添加所需的包：
代码语言：javascript复制sudo apt-get update
sudo apt-get install python3 python3-pip python3-pil libjpeg-dev zlib1g-dev libfreetype6-dev liblcms2-dev libopenjp2-7 libtiff5 -y
sudo -H pip3 install luma.lcd如果您不使用 Raspbian，则需要查阅 Linux 发行版的文档以确定安装依赖项的正确步骤。
授予权限：
luma.lcd使用需要访问权限的硬件接口。成功安装后，luma.lcd您可能希望将您的luma.lcd程序将运行的用户帐户添加到授予对这些接口的访问权限的组中。
sudo usermod -a -G spi,gpio,i2c piSPI与BCM接口：
代码语言：javascript复制cs = 24 # 片选
dc = 25 # 数据/命令 切换
sda = 19 # 数据
scl = 23 # 时钟
rst = 27 # 复位示例代码：
代码语言：javascript复制# -*- coding: UTF-8 -*-
from luma.core.interface.serial import spi
from luma.lcd.device import st7735
from PIL import Image, ImageDraw, ImageFont
from luma.core.render import canvas
import RPi.GPIO as GPIO
import time
BL = 24
class Screen:
def __init__(self):
self.height = 128
self.width = 160
self.serial = spi(port=0, device=0, gpio_DC=25, gpio_RST=27)
self.device = st7735(self.serial, width=self.width, height=self.height, rotate=1, h_offset=0, v_offset=0, bgr=False)
self.buffer = Image.new(self.device.mode, self.device.size)
self.fontType = '/usr/share/fonts/ZaoZiGongFangZhiYanTi.ttf'
self.fontTypeEN = '/usr/share/fonts/consolas/CONSOLAB.TTF'
self.fontSize = 24
self.font = ImageFont.truetype(self.fontType, self.fontSize)
self.draw = ImageDraw.Draw(self.buffer)
def initGPIO(self):
GPIO.setmode(GPIO.BCM)
GPIO.setup(BL,GPIO.OUT)
def closeGPIO(self):
GPIO.cleanup()
def openScreen(self):
GPIO.output(BL, GPIO.HIGH)
def closeScreen(self):
GPIO.output(BL, GPIO.LOW)
def drawRect(self, x, y, w, h, color='black', outline=None):
self.draw.rectangle((x, y, x w, y h), outline=outline, fill=color)
self.device.display(self.buffer)
def drawDemo(self):
self.draw.rectangle((10,10,10 20,10 20), outline="white", fill="green")
self.draw.text((30, 40), "Hello World", fill="red")
self.draw.text((10, 70), "http://xfxuezhang.cn", "white")
self.device.display(self.buffer)
#with canvas(self.device) as draw:
# draw.rectangle((10,10,10 20,10 20), outline="white", fill="green")
# draw.text((30, 40), "Hello World", fill="red")
# draw.text((10, 70), "http://xfxuezhang.cn", "white")
def drawTextEN(self, x, y, msg, color='white', fontSize=None, fontType=None):
newType = fontType if fontType else self.fontTypeEN
newSize = fontSize if fontSize else self.fontSize
font = ImageFont.truetype(newType, newSize)
self.drawRect(x, y, len(msg)*newSize/2, newSize, 'black')
self.draw.text((x, y), msg, font=font, fill=color)
self.device.display(self.buffer)
def drawTextCN(self, x, y, msg, color='white', fontSize=None, fontType=None):
newType = fontType if fontType else self.fontType
newSize = fontSize if fontSize else self.fontSize
font = ImageFont.truetype(newType, newSize)
self.drawRect(x, y, len(msg)*newSize, newSize, 'black')
self.draw.text((x, y), msg, font=font, fill=color)
self.device.display(self.buffer)
def clearScreen(self, color='black'):
self.draw.rectangle(self.device.bounding_box, outline=None, fill=color)
self.device.display(self.buffer)
def showInfo(self):
self.clearScreen()
self.drawTextCN(18, 20, '小锋学长')
self.drawTextCN(5, 45, '生活大爆炸')
self.drawTextEN(20, 80, "xfxuezhang.cn", "red", fontSize=12)
if __name__ == '__main__':
try:
screen = Screen()
screen.initGPIO()
screen.openScreen()
screen.drawDemo()
time.sleep(2)
screen.clearScreen()
print(screen.width)
print(screen.height)
screen.showInfo()
screen.drawTextCN(5, 125, '捕获总数=', color='green', fontSize=18)
screen.drawTextEN(85, 125, str(1), color='red', fontSize=18)
time.sleep(2)
screen.drawTextEN(85, 125, str(2), color='red', fontSize=18)
except:
pass
finally:
screen.closeGPIO()实际效果：
