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esp32使用MicroPython驱动oled屏显示中文和英文

本文博客链接:http://blog.csdn.net/jdh99,作者:jdh,转载请注明.

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介绍

手边有个0.96寸的oled屏,驱动芯片是ssd1306,分辨率是128x64,支持ic接口。准备用esp32开发板驱动它。

在网上查了一圈,使用MicroPython驱动oled屏,大都是用官方库ssd1306驱动。官方库只支持8x8显示英文字符,屏幕上显示太小了,看起来太吃力。于是写了个库micropython-ssd1306py,支持中英文显示,并支持不同字号。

安装

输入命令下载包到指定目录:

pip install --target=d:/package micropython-ssd1306py

下载后目录:

在这里插入图片描述

删除掉无关文件README和egg-info,将ssd1306py文件夹放在设备的lib目录下。注意:必须放在lib目录下

在设备中的目录:

在这里插入图片描述

特点

  • 支持英文字号8x8,16x16,24x24,32x32
  • 支持中文字号16x16,24x24,32x32
  • 封装lcd操作常用接口

开源

硬件连接

在这里插入图片描述 在这里插入图片描述

API

def init_i2c(scl, sda, width, height):
    """
    初始化i2c接口
    :param scl: i2c的时钟脚
    :param sda: i2c的数据脚
    :param width: oled屏幕的宽度像素
    :param height: oled屏幕的高度像素
    """

def clear():
    """清除屏幕"""

def show():
    """屏幕刷新显示"""
   
def pixel(x, y):
    """画点"""

def text(string, x_axis, y_axis, font_size):
    """显示字符串.注意字符串必须是英文或者数字"""

def set_font(font, font_size):
    """
    设置中文字库.允许设置多个不同大小的字库
    字库必须是字典,格式示例:
    font = {
    0xe4bda0:
        [0x08, 0x08, 0x08, 0x11, 0x11, 0x32, 0x34, 0x50, 0x91, 0x11, 0x12, 0x12, 0x14, 0x10, 0x10, 0x10, 0x80, 0x80,
         0x80, 0xFE, 0x02, 0x04, 0x20, 0x20, 0x28, 0x24, 0x24, 0x22, 0x22, 0x20, 0xA0, 0x40],  # 你
    0xe5a5bd:
        [0x10, 0x10, 0x10, 0x10, 0xFC, 0x24, 0x24, 0x25, 0x24, 0x48, 0x28, 0x10, 0x28, 0x44, 0x84, 0x00, 0x00, 0xFC,
         0x04, 0x08, 0x10, 0x20, 0x20, 0xFE, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0xA0, 0x40]  # 好
    }
    """

def text_cn(string, x_axis, y_axis, font_size):
    """显示中文字符.注意字符必须是utf-8编码"""

示例

显示英文字符

import ssd1306py as lcd


lcd.init_i2c(22, 21, 128, 64)
lcd.text('font8x8', 0, 0, 8)
lcd.text('font16x16', 0, 20, 16)
lcd.show()

显示效果: 在这里插入图片描述

import ssd1306py as lcd


lcd.init_i2c(22, 21, 128, 64)
lcd.text('font32x32', 0, 0, 32)
lcd.show()

在这里插入图片描述

显示汉字

汉字字库较大,单一字号的字库就需要几M字节,所以没有放在库中。需要自己将需要显示的汉字做成字库传入到库中。

制作字库可以使用工具PCtoLCD2002,百度网盘下载链接,提取码:z4tf

使用方法可参考:如何使用PCtoLCD2002取模(汉字、ASCII字符集)

提取的汉字字库做成字典格式供程序使用,字典的键是汉字的utf-8编码值。可以使用python获取python的utf-8值,比如: 在这里插入图片描述 则汉字”你“的utf-8值是0xe4bda0。

也可以使用在线转换工具查询:http://www.mytju.com/classcode/tools/encode_utf8.asp

比如以下示例,显示汉字“你好”。

import ssd1306py as lcd

lcd.init_i2c(22, 21, 128, 64)

font16 = {
    0xe4bda0:
        [0x08, 0x08, 0x08, 0x11, 0x11, 0x32, 0x34, 0x50, 0x91, 0x11, 0x12, 0x12, 0x14, 0x10, 0x10, 0x10, 0x80, 0x80,
         0x80, 0xFE, 0x02, 0x04, 0x20, 0x20, 0x28, 0x24, 0x24, 0x22, 0x22, 0x20, 0xA0, 0x40],  # 你
    0xe5a5bd:
        [0x10, 0x10, 0x10, 0x10, 0xFC, 0x24, 0x24, 0x25, 0x24, 0x48, 0x28, 0x10, 0x28, 0x44, 0x84, 0x00, 0x00, 0xFC,
         0x04, 0x08, 0x10, 0x20, 0x20, 0xFE, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0xA0, 0x40]  # 好
}

font24 = {
    0xe4bda0:
        [0x00, 0x01, 0x01, 0x03, 0x03, 0x02, 0x04, 0x04, 0x0E, 0x1C, 0x14, 0x24, 0x44, 0x04, 0x04, 0x04, 0x04, 0x04,
         0x04, 0x05, 0x04, 0x06, 0x04, 0x00,
         0x00, 0x00, 0x8C, 0x0C, 0x08, 0x18, 0x1F, 0x30, 0x21, 0x41, 0x41, 0x91, 0x19, 0x11, 0x31, 0x21, 0x41, 0x41,
         0x81, 0x01, 0x11, 0x0F, 0x02, 0x00,
         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFC, 0x0C, 0x10, 0x00, 0x00, 0x00, 0x20, 0x10, 0x18, 0x0C, 0x0C, 0x06,
         0x04, 0x00, 0x00, 0x00, 0x00, 0x00],  # 你
    0xe5a5bd:
        [0x00, 0x00, 0x06, 0x06, 0x06, 0x04, 0x04, 0x7F, 0x0C, 0x0C, 0x08, 0x08, 0x08, 0x18, 0x10, 0x11, 0x0D, 0x03,
         0x02, 0x04, 0x18, 0x20, 0x40, 0x00,
         0x00, 0x00, 0x00, 0x00, 0x1F, 0x00, 0x00, 0xC0, 0x40, 0x40, 0xC0, 0x80, 0xBF, 0x80, 0x80, 0x00, 0x00, 0x80,
         0xC0, 0x60, 0x00, 0x07, 0x01, 0x00,
         0x00, 0x00, 0x00, 0x00, 0xF8, 0x18, 0x20, 0x40, 0x80, 0x80, 0x80, 0x84, 0xFE, 0x80, 0x80, 0x80, 0x80, 0x80,
         0x80, 0x80, 0x80, 0x80, 0x00, 0x00]  # 好
}

font32 = {
    0xe4bda0:
        [0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x01, 0x03, 0x03, 0x07, 0x0D, 0x09, 0x11, 0x11, 0x21,
         0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
         0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x00, 0x00, 0x00, 0x40, 0x70, 0x60, 0xE0, 0xC0, 0xC1, 0x81, 0x03,
         0x03, 0x86, 0x84, 0x8C, 0x88, 0x90,
         0x81, 0x83, 0x83, 0x83, 0x86, 0x86, 0x8C, 0x88, 0x90, 0x90, 0xA0, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, 0x00,
         0x00, 0x60, 0xE0, 0xC0, 0xC0, 0x80,
         0x80, 0xFF, 0x00, 0x10, 0x0C, 0x08, 0x08, 0x08, 0x88, 0x88, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08,
         0x08, 0x08, 0xF8, 0x38, 0x10, 0x00,
         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0xFC, 0x18, 0x30, 0x20, 0x40, 0x00, 0x00, 0x00, 0x80,
         0x40, 0x20, 0x30, 0x18, 0x1C, 0x0C,
         0x0C, 0x0C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00],  # 你
    0xe5a5bd:
        [0x00, 0x00, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x03, 0x3F, 0x03, 0x03, 0x02, 0x06, 0x06, 0x04, 0x04, 0x0C,
         0x0C, 0x08, 0x08, 0x0E, 0x01, 0x00,
         0x00, 0x01, 0x03, 0x04, 0x08, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0xC0, 0x80, 0x81, 0x80, 0x00, 0x08, 0xFC,
         0x08, 0x08, 0x18, 0x18, 0x18, 0x18,
         0x17, 0x30, 0x30, 0x30, 0x60, 0x60, 0xC0, 0xF0, 0xBC, 0x8C, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
         0x00, 0x00, 0x00, 0xFF, 0x00, 0x00,
         0x00, 0x01, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0xFF, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06, 0x06,
         0x06, 0x06, 0xFC, 0x1C, 0x08, 0x00,
         0x00, 0x00, 0x00, 0x00, 0x20, 0xF0, 0x70, 0xC0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0xFC, 0x00,
         0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]  # 好
}

lcd.init_i2c(22, 21, 128, 64)
lcd.set_font(font16, 16)
lcd.set_font(font24, 24)
lcd.set_font(font32, 32)
lcd.text_cn('你好', 0, 0, 16)
lcd.text_cn('你好', 40, 00, 24)
lcd.text_cn('你好', 0, 30, 32)
lcd.show()

在这里插入图片描述

参考链接

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