08. ESP32 Micropython编程（Thonny）0.96 OLED SSD1306 显示中文 英文

0.96 OLED 128x64 SSD1306

#MicroPython SSD1306 OLED driver, I2C and SPI interfaces created by Adafruit

import time
import framebuf

# register definitions
SET_ConTRAST        = const(0x81)
SET_ENTIRE_ON       = const(0xa4)
SET_NORM_INV        = const(0xa6)
SET_DISP            = const(0xae)
SET_MEM_ADDR        = const(0x20)
SET_COL_ADDR        = const(0x21)
SET_PAGE_ADDR       = const(0x22)
SET_DISP_START_LINE = const(0x40)
SET_SEG_REMAP       = const(0xa0)
SET_MUX_RATIO       = const(0xa8)
SET_COM_OUT_DIR     = const(0xc0)
SET_DISP_OFFSET     = const(0xd3)
SET_COM_PIN_CFG     = const(0xda)
SET_DISP_CLK_DIV    = const(0xd5)
SET_PRECHARGE       = const(0xd9)
SET_VCOM_DESEL      = const(0xdb)
SET_CHARGE_PUMP     = const(0x8d)


class SSD1306:
    def __init__(self, width, height, external_vcc):
        self.width = width
        self.height = height
        self.external_vcc = external_vcc
        self.pages = self.height // 8
        # Note the subclass must initialize self.framebuf to a framebuffer.
        # This is necessary because the underlying data buffer is different
        # between I2C and SPI implementations (I2C needs an extra byte).
        self.poweron()
        self.init_display()

    def init_display(self):
        for cmd in (
            SET_DISP | 0x00, # off
            # address setting
            SET_MEM_ADDR, 0x00, # horizontal
            # resolution and layout
            SET_DISP_START_LINE | 0x00,
            SET_SEG_REMAP | 0x01, # column addr 127 mapped to SEG0
            SET_MUX_RATIO, self.height - 1,
            SET_COM_OUT_DIR | 0x08, # scan from COM[N] to COM0
            SET_DISP_OFFSET, 0x00,
            SET_COM_PIN_CFG, 0x02 if self.height == 32 else 0x12,
            # timing and driving scheme
            SET_DISP_CLK_DIV, 0x80,
            SET_PRECHARGE, 0x22 if self.external_vcc else 0xf1,
            SET_VCOM_DESEL, 0x30, # 0.83*Vcc
            # display
            SET_CONTRAST, 0xff, # maximum
            SET_ENTIRE_ON, # output follows RAM contents
            SET_NORM_INV, # not inverted
            # charge pump
            SET_CHARGE_PUMP, 0x10 if self.external_vcc else 0x14,
            SET_DISP | 0x01): # on
            self.write_cmd(cmd)
        self.fill(0)
        self.show()

    def poweroff(self):
        self.write_cmd(SET_DISP | 0x00)

    def contrast(self, contrast):
        self.write_cmd(SET_CONTRAST)
        self.write_cmd(contrast)

    def invert(self, invert):
        self.write_cmd(SET_NORM_INV | (invert & 1))

    def show(self):
        x0 = 0
        x1 = self.width - 1
        if self.width == 64:
            # displays with width of 64 pixels are shifted by 32
            x0 += 32
            x1 += 32
        self.write_cmd(SET_COL_ADDR)
        self.write_cmd(x0)
        self.write_cmd(x1)
        self.write_cmd(SET_PAGE_ADDR)
        self.write_cmd(0)
        self.write_cmd(self.pages - 1)
        self.write_framebuf()

    def fill(self, col):
        self.framebuf.fill(col)

    def pixel(self, x, y, col):
        self.framebuf.pixel(x, y, col)

    def scroll(self, dx, dy):
        self.framebuf.scroll(dx, dy)

    def text(self, string, x, y, col=1):
        self.framebuf.text(string, x, y, col)


class SSD1306_I2C(SSD1306):
    def __init__(self, width, height, i2c, addr=0x3c, external_vcc=False):
        self.i2c = i2c
        self.addr = addr
        self.temp = bytearray(2)
        # Add an extra byte to the data buffer to hold an I2C data/command byte
        # to use hardware-compatible I2C transactions.  A memoryview of the
        # buffer is used to mask this byte from the framebuffer operations
        # (without a major memory hit as memoryview doesn't copy to a separate
        # buffer).
        self.buffer = bytearray(((height // 8) * width) + 1)
        self.buffer[0] = 0x40  # Set first byte of data buffer to Co=0, D/C=1
        self.framebuf = framebuf.frameBuffer1(memoryview(self.buffer)[1:], width, height)
        super().__init__(width, height, external_vcc)

    def write_cmd(self, cmd):
        self.temp[0] = 0x80 # Co=1, D/C#=0
        self.temp[1] = cmd
        self.i2c.writeto(self.addr, self.temp)

    def write_framebuf(self):
        # Blast out the frame buffer using a single I2C transaction to support
        # hardware I2C interfaces.
        self.i2c.writeto(self.addr, self.buffer)

    def poweron(self):
        pass


class SSD1306_SPI(SSD1306):
    def __init__(self, width, height, spi, dc, res, cs, external_vcc=False):
        self.rate = 10 * 1024 * 1024
        dc.init(dc.OUT, value=0)
        res.init(res.OUT, value=0)
        cs.init(cs.OUT, value=1)
        self.spi = spi
        self.dc = dc
        self.res = res
        self.cs = cs
        self.buffer = bytearray((height // 8) * width)
        self.framebuf = framebuf.frameBuffer1(self.buffer, width, height)
        super().__init__(width, height, external_vcc)

    def write_cmd(self, cmd):
        self.spi.init(baudrate=self.rate, polarity=0, phase=0)
        self.cs.high()
        self.dc.low()
        self.cs.low()
        self.spi.write(bytearray([cmd]))
        self.cs.high()

    def write_framebuf(self):
        self.spi.init(baudrate=self.rate, polarity=0, phase=0)
        self.cs.high()
        self.dc.high()
        self.cs.low()
        self.spi.write(self.buffer)
        self.cs.high()

    def poweron(self):
        self.res.high()
        time.sleep_ms(1)
        self.res.low()
        time.sleep_ms(10)
        self.res.high()

以上代码为官方代码 可以直接复制为新文件，ssd1306.py并烧写到Micropython设备中使用（这个文件必须有，并烧写到设备中）

主编辑器中

from machine import Pin, SoftI2C  #从机器导入GPIO模块和软件I2C模块
import ssd1306                    #导入之前已经上传的ssd1306.py库
from time import sleep

# ESP32 Pin assignment 
i2c = SoftI2C(scl=Pin(22), sda=Pin(21))

# ESP8266 Pin assignment
#i2c = SoftI2C(scl=Pin(5), sda=Pin(4))

oled_width = 128
oled_height = 64
oled = ssd1306.SSD1306_I2C(oled_width, oled_height, i2c)

oled.text('Hello, World 1!', 0, 0)
oled.text('Hello, World 2!', 0, 10)
oled.text('Hello, World 3!', 0, 20)
        
oled.show()

运行该脚本 ，则会显示下图（手机不好，请理解）

主编辑器中

from machine import Pin, I2C

#OLED=....
i2c = I2C(scl=Pin(22), sda=Pin(21))
from ssd1306 import SSD1306_I2C 
OLED= SSD1306_I2C(128, 64, i2c)

#fonts=....
fonts= {
    0xe585b3:
    [0x10, 0x08, 0x08, 0x00, 0x3F, 0x01, 0x01, 0x01, 0xFF, 0x01, 0x02, 0x02, 0x04, 0x08, 0x30, 0xC0,
     0x10, 0x10, 0x20, 0x00, 0xF8, 0x00, 0x00, 0x00, 0xFE, 0x00, 0x80, 0x80, 0x40, 0x20, 0x18, 0x06],  # 关
    
    0xe788b1:
    [0x00, 0x01, 0x7E, 0x22, 0x11, 0x7F, 0x42, 0x82, 0x7F, 0x04, 0x07, 0x0A, 0x11, 0x20, 0x43, 0x1C,
     0x08, 0xFC, 0x10, 0x10, 0x20, 0xFE, 0x02, 0x04, 0xF8, 0x00, 0xF0, 0x10, 0x20, 0xC0, 0x30, 0x0E],  # 爱
    
    0xe58d95:
    [0x10, 0x08, 0x04, 0x3F, 0x21, 0x21, 0x3F, 0x21, 0x21, 0x3F, 0x01, 0x01, 0xFF, 0x01, 0x01, 0x01,
     0x10, 0x20, 0x40, 0xF8, 0x08, 0x08, 0xF8, 0x08, 0x08, 0xF8, 0x00, 0x00, 0xFE, 0x00, 0x00, 0x00],  # 单
    
    0xe8baab:
    [0x02, 0x04, 0x1F, 0x10, 0x1F, 0x10, 0x1F, 0x10, 0x10, 0x7F, 0x00, 0x00, 0x03, 0x1C, 0xE0, 0x00,
     0x00, 0x00, 0xF0, 0x10, 0xF0, 0x10, 0xF2, 0x14, 0x18, 0xF0, 0x50, 0x90, 0x10, 0x10, 0x50, 0x20],  # 身
    
    0xe78b97:
    [0x00, 0x44, 0x29, 0x11, 0x2A, 0x4C, 0x89, 0x09, 0x19, 0x29, 0x49, 0x89, 0x08, 0x08, 0x50, 0x20,
     0x80, 0x80, 0x00, 0xFC, 0x04, 0x04, 0xE4, 0x24, 0x24, 0x24, 0xE4, 0x24, 0x04, 0x04, 0x28, 0x10],  # 狗
    
    0xe68890:
    [0x00, 0x00, 0x00, 0x3F, 0x20, 0x20, 0x20, 0x3E, 0x22, 0x22, 0x22, 0x22, 0x2A, 0x44, 0x40, 0x81,
     0x50, 0x48, 0x40, 0xFE, 0x40, 0x40, 0x44, 0x44, 0x44, 0x28, 0x28, 0x12, 0x32, 0x4A, 0x86, 0x02],  # 成
    
    0xe995bf:
    [0x08, 0x08, 0x08, 0x08, 0x08, 0x09, 0x08, 0xFF, 0x0A, 0x09, 0x08, 0x08, 0x09, 0x0A, 0x0C, 0x08,
     0x00, 0x10, 0x20, 0x40, 0x80, 0x00, 0x00, 0xFE, 0x00, 0x00, 0x80, 0x40, 0x20, 0x18, 0x06, 0x00],  # 长"
    
    0xe58d8f:
    [0x20, 0x20, 0x20, 0x20, 0xFB, 0x20, 0x20, 0x22, 0x22, 0x24, 0x28, 0x20, 0x21, 0x21, 0x22, 0x24,
     0x80, 0x80, 0x80, 0x80, 0xF0, 0x90, 0x90, 0x98, 0x94, 0x92, 0x92, 0x90, 0x10, 0x10, 0x50, 0x20],  # 协
    
    0xe4bc9a:
    [0x01, 0x01, 0x02, 0x04, 0x08, 0x30, 0xCF, 0x00, 0x00, 0x7F, 0x02, 0x04, 0x08, 0x10, 0x3F, 0x10,
     0x00, 0x00, 0x80, 0x40, 0x20, 0x18, 0xE6, 0x00, 0x00, 0xFC, 0x00, 0x00, 0x20, 0x10, 0xF8, 0x08]  # 会
}


#函数部分
def chinese(ch_str, x_axis, y_axis): 
   offset_ = 0 
   for k in ch_str: 
       code = 0x00  # 将中文转成16进制编码 
       data_code = k.encode("utf-8")
       code |= data_code[0] << 16
       code |= data_code[1] << 8
       code |= data_code[2]
       byte_data = fonts[code]
       for y in range(0, 16):
           a_ = bin(byte_data[y]).replace('0b', '')
           while len(a_) < 8:
               a_ = '0'+ a_
           b_ = bin(byte_data[y+16]).replace('0b', '')
           while len(b_) < 8:
               b_ = '0'+ b_
           for x in range(0, 8):
               OLED.pixel(x_axis + offset_ + x,    y+y_axis, int(a_[x]))   
               OLED.pixel(x_axis + offset_ + x +8, y+y_axis, int(b_[x]))   
       offset_ += 16
       
chinese('关爱单身狗',16,4) 
OLED.show()
OLED.text('hello world',0,32)
OLED.show()

运行上面脚本，则会显示下图

参考：关爱单身狗成长协会
基本上完全复制他的这部分代码，感觉比较方便

fonts字体取模

#fonts=....
fonts= {
    0xe585b3:    [......],  # 关    
    0xe788b1:    [......],  # 爱    
    0xe58d95:    [......],  # 单
    0xe8baab:    [......],  # 身    
    0xe78b97:    [......],  # 狗    
    0xe68890:    [......],  # 成
    0xe995bf:    [......],  # 长 
    0xe58d8f:    [......],  # 协
    0xe4bc9a:    [......]   # 会
}

0xe585b3 0xe788b1 0xe58d95 是 UTF-8字符编码 参考 该网站 转换

可以参考 四 中的程序

主编辑器中

from machine import Pin, I2C
i2c = I2C(scl=Pin(22), sda=Pin(21))

from ssd1306 import SSD1306_I2C 
OLED= SSD1306_I2C(128, 64, i2c)

#字体部分
fonts= {
    0x000030: #0
    [0x00, 0x00, 0x03, 0x07, 0x0E, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x0E, 0x07, 0x03, 0x00, 0x00,
     0x00, 0x00, 0xC0, 0xE0, 0x70, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x70, 0xE0, 0xC0, 0x00, 0x00],  # 0
    0x000031: #1
    [0x00, 0x00, 0x01, 0x03, 0x06, 0x0C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x1F, 0x00, 0x00,
     0x00, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xF0, 0xFC, 0x00, 0x00],  # 1
    0x000032: #2
    [0x00,0x03,0x07,0x0E,0x18,0x00,0x00,0x00,0x01,0x03,0x06,0x0C,0x1F,0x3F,0x00,0x00,
     0x00,0xC0,0xE0,0x70,0x30,0x30,0x70,0xE0,0xC0,0x80,0x00,0x00,0xF8,0xFC,0x00,0x00],  # 2
    0x000033: #3
    [0x00,0x07,0x0F,0x18,0x00,0x00,0x01,0x03,0x01,0x00,0x00,0x18,0x0F,0x07,0x00,0x00,
     0x00,0xC0,0xE0,0x70,0x30,0x70,0xE0,0xC0,0xE0,0x70,0x30,0x70,0xE0,0xC0,0x00,0x00],  # 3
    0x000034: #4
    [0x00,0x00,0x00,0x00,0x01,0x03,0x03,0x06,0x0C,0x1F,0x3F,0x00,0x00,0x00,0x00,0x00,
     0x00,0x60,0xE0,0xE0,0xE0,0xE0,0x60,0x60,0x60,0xF8,0xF8,0x60,0x60,0x60,0x00,0x00],  # 4
    0x000035: #5
    [0x00,0x07,0x07,0x06,0x06,0x06,0x07,0x07,0x00,0x00,0x00,0x0C,0x0F,0x07,0x00,0x00,
     0x00,0xE0,0xE0,0x00,0x00,0x00,0xC0,0xE0,0x70,0x30,0x30,0x70,0xE0,0xC0,0x00,0x00],  # 5    
    0x000036: #6
    [0x00,0x01,0x03,0x07,0x0E,0x0C,0x0D,0x0F,0x0E,0x0C,0x0C,0x0E,0x07,0x03,0x00,0x00,
     0x00,0xE0,0xF0,0x18,0x00,0x00,0xE0,0xF0,0x38,0x18,0x18,0x38,0xF0,0xE0,0x00,0x00],  # 6
    0x000037: #7
    [0x00,0x00,0x0F,0x0F,0x00,0x00,0x00,0x00,0x01,0x01,0x03,0x03,0x03,0x03,0x00,0x00,
     0x00,0x00,0xF0,0xF0,0x30,0x70,0xE0,0xC0,0x80,0x80,0x80,0x00,0x00,0x00,0x00,0x00],  # 7
    0x000038: #8
    [0x00,0x03,0x07,0x0E,0x0C,0x0C,0x06,0x03,0x07,0x0E,0x0C,0x0C,0x0E,0x07,0x03,0x00,
     0x00,0xC0,0xE0,0x70,0x30,0x30,0x60,0xC0,0xE0,0x70,0x30,0x30,0x70,0xE0,0xC0,0x00],  # 8
    0x000039: #9
    [0x00,0x03,0x07,0x0E,0x0C,0x0C,0x0E,0x07,0x03,0x00,0x00,0x00,0x0F,0x07,0x00,0x00,
     0x00,0xC0,0xE0,0x70,0x30,0x30,0x70,0xF0,0xF0,0x30,0x30,0x60,0xE0,0xC0,0x00,0x00],  # 9
}

def text_16X16(ch_str, x_axis, y_axis): 
   offset_ = 0 
   for k in ch_str: 
       code = 0x00  # 转成16进制编码 
       data_code = k.encode("utf-8")
       code |= data_code[0]
       byte_data = fonts[code]
       for y in range(0, 16):
           a_ = bin(byte_data[y]).replace('0b', '')
           while len(a_) < 8:
               a_ = '0'+ a_
           b_ = bin(byte_data[y+16]).replace('0b', '')
           while len(b_) < 8:
               b_ = '0'+ b_
           for x in range(0, 8):
               OLED.pixel(x_axis + offset_ + x,    y+y_axis, int(a_[x]))   
               OLED.pixel(x_axis + offset_ + x +8, y+y_axis, int(b_[x]))   
       offset_ += 16



text_16X16('01234',0,0)
text_16X16('56789',0,16)
OLED.show()

运行该脚本，则会显示以下图片

此处显示的是数字，若是需要显示其他大号字符，可以自行取模并且定义显示。