前往小程序,Get更优阅读体验!
立即前往
首页
学习
活动
专区
工具
TVP
发布
社区首页 >专栏 >树莓派4B驱动1.8寸ST7735S TFT屏幕

树莓派4B驱动1.8寸ST7735S TFT屏幕

作者头像
小锋学长生活大爆炸
发布2021-10-08 09:59:38
1.6K0
发布2021-10-08 09:59:38
举报
文章被收录于专栏:小锋学长生活大爆炸

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。

代码语言:javascript
复制
sudo usermod -a -G spi,gpio,i2c pi

SPI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:

本文参与 腾讯云自媒体同步曝光计划,分享自作者个人站点/博客。
原始发表:2021/09/30 ,如有侵权请联系 cloudcommunity@tencent.com 删除

本文分享自 作者个人站点/博客 前往查看

如有侵权,请联系 cloudcommunity@tencent.com 删除。

本文参与 腾讯云自媒体同步曝光计划  ,欢迎热爱写作的你一起参与!

评论
登录后参与评论
0 条评论
热度
最新
推荐阅读
领券
问题归档专栏文章快讯文章归档关键词归档开发者手册归档开发者手册 Section 归档