物联网开发笔记（85）- 使用Micropython开发ESP32开发板之通过I2C控制0

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        SET_COM_OUT_DIR | 0x08,  # scan from COM[N] to COM0
        SET_DISP_OFFSET,
        0x00,
        SET_COM_PIN_CFG,
        0x02 if self.width > 2 * self.height 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 poweron(self):
    self.write_cmd(SET_DISP | 0x01)

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_data(self.buffer)

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) self.write_list = [b"\x40", None] # Co=0, D/C#=1 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_data(self, buf):
    self.write_list[1] = buf
    self.i2c.writevto(self.addr, self.write_list)

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 import time

    self.res(1)
    time.sleep_ms(1)
    self.res(0)
    time.sleep_ms(10)
    self.res(1)
    super().__init__(width, height, external_vcc)

def write_cmd(self, cmd):
    self.spi.init(baudrate=self.rate, polarity=0, phase=0)
    self.cs(1)
    self.dc(0)
    self.cs(0)
    self.spi.write(bytearray([cmd]))
    self.cs(1)

def write_data(self, buf):
    self.spi.init(baudrate=self.rate, polarity=0, phase=0)
    self.cs(1)
    self.dc(1)
    self.cs(0)
    self.spi.write(buf)
    self.cs(1)


**四、演示代码**


提前使用取模软件PCtoLCD2002.exe，获得“元旦快乐”四个汉字的字模。使用方法大家百度下，或者看我前面文章，也有介绍。


软件下载地址：


链接: https://pan.baidu.com/s/1mHZANIGNZ1a67Plv31\_eFQ 提取码: srkp

from machine import Pin,I2C from ssd1306 import SSD1306_I2C import time

addr = 0x3c i2c = I2C(0,scl = Pin(15),sda = Pin(4),freq = 1_000_000) oled = SSD1306_I2C(128,32,i2c,addr) #print(hex(i2c.scan()[0]))

class Chine: chine = [ 0x00,0x00,0x00,0x00,0x00,0x00,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10, 0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x18,0x10,0x00,0x00,0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x90,0xF0,0x30,0x10,0x10, 0x10,0x10,0xF0,0xF0,0x10,0x10,0x10,0x10,0x10,0x10,0x18,0x18,0x10,0x00,0x00,0x00,

            0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0xF0,0x7F,0x0F,0x00,0x00,0x00,
            0x00,0x00,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0x00,0x00,0x00,
            0x00,0x00,0x40,0x20,0x20,0x10,0x18,0x0C,0x06,0x03,0x01,0x00,0x00,0x00,0x00,0x00,
            0x00,0x00,0x0F,0x1F,0x18,0x18,0x18,0x18,0x18,0x18,0x18,0x1C,0x1F,0x0C,0x00,0x00,#元,0#

            0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xF0,0xE0,0x20,0x20,0x20,0x20,0x20,0x20,
            0x20,0x20,0x20,0x20,0x20,0x20,0xE0,0xF0,0x20,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
            0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0x20,0x20,0x20,0x20,0x20,0x20,
            0x20,0x20,0x20,0x20,0x20,0x20,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
            0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0x20,0x20,0x20,0x20,0x20,0x20,
            0x20,0x20,0x20,0x20,0x20,0x20,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
            0x00,0x00,0x10,0x10,0x10,0x10,0x10,0x10,0x11,0x10,0x10,0x10,0x10,0x10,0x10,0x10,
            0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x18,0x1C,0x18,0x10,0x00,0x00,#旦,1#

            0x00,0x00,0x00,0x00,0x00,0x00,0xFC,0xF8,0x08,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
            0x00,0xFC,0xF8,0x08,0x00,0x00,0x00,0x00,0x00,0x80,0x00,0x00,0x00,0x00,0x00,0x00,
            0x00,0x00,0xC0,0xF0,0x30,0x00,0xFF,0xFF,0x02,0x04,0x1C,0x38,0x01,0x01,0x01,0x01,
            0x01,0xFF,0xFF,0x01,0x01,0x01,0x01,0x01,0x01,0xFF,0xFF,0x01,0x00,0x00,0x00,0x00,
            0x00,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0x00,0x00,0x02,0x02,0x02,0x02,0x02,0x82,
            0xF2,0x3F,0x07,0x02,0x1E,0xE2,0x82,0x02,0x02,0x03,0x03,0x02,0x03,0x02,0x00,0x00,
            0x00,0x00,0x00,0x00,0x00,0x00,0x7F,0x3F,0x00,0x40,0x20,0x10,0x18,0x0C,0x06,0x03,
            0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x07,0x0E,0x1C,0x38,0x70,0x30,0x10,0x00,0x00,#快,2#

            0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE0,0xC0,0x40,0x40,0x40,0x40,0x40,0x20,0x20,
            0x20,0x20,0x20,0x20,0x30,0x30,0x30,0x18,0x18,0x10,0x00,0x00,0x00,0x00,0x00,0x00,
            0x00,0x00,0x00,0x00,0x00,0x80,0xFC,0xFF,0x81,0x80,0x80,0x80,0x80,0x80,0x80,0x80,
            0xFF,0xFF,0x82,0x80,0x80,0x80,0x80,0x80,0x80,0x80,0xC0,0xC0,0x80,0x00,0x00,0x00,
            0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x80,0xC0,0x60,0x38,0x18,0x10,0x00,0x00,0x00,
            0xFF,0xFF,0x00,0x00,0x00,0x08,0x10,0x20,0xE0,0xC0,0x80,0x00,0x00,0x00,0x00,0x00,
            0x00,0x00,0x10,0x08,0x04,0x06,0x03,0x01,0x00,0x00,0x00,0x08,0x10,0x10,0x30,0x70,
            0x3F,0x3F,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x0F,0x0F,0x00,0x00,0x00,0x00,#乐,3#
    ]

16x16汉字显示函数

def ByteOpera16x16(num,dat): byte= [0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80] if dat&byte[num]: return 1 else: return 0

def LcdShowCh_16x16(n, x_axis, y_axis): for i in range(2): for a in range(16): for b in range(8): if(ByteOpera16x16(b,Chine.chine[n32+i16+a])): oled.pixel(x_axis+a,y_axis+i8+b,1) else: oled.pixel(x_axis+a,y_axis+i8+b,0)

32x32汉字显示函数

def ByteOpera16x16(num,dat): byte= [0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80] if dat&byte[num]: return 1 else: return 0

def LcdShowCh_32x32(n, x_axis, y_axis): for i in range(4): for a in range(32): for b in range(8): if(ByteOpera16x16(b,Chine.chine[n128+i32+a])): oled.pixel(x_axis+a,y_axis+i8+b,1) else: oled.pixel(x_axis+a,y_axis+i8+b,0)

def main(): oled.contrast(155) #0-255 #亮度调节函数

#oled.text("HappyNewYear",0,0)
#oled.show()

while True:
    for i in range(4):
        LcdShowCh_32x32(i,i*32,0)
        oled.show()

if name == "main": main()


 演示效果


![](https://p9-xtjj-sign.byteimg.com/tos-cn-i-73owjymdk6/4b3c632b36a44fc180b27af41b60a59c~tplv-73owjymdk6-jj-mark-v1:0:0:0:0:5o6Y6YeR5oqA5pyv56S-5Yy6IEAg5py65Zmo5a2m5Lmg5LmL5b-DQUk=:q75.awebp?rk3s=f64ab15b&x-expires=1771856622&x-signature=q5fTBRNI9NAnSDmo2KonFV9EgOw%3D)


 **五、购买地址**



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