物联网开发100 - Micropython ESP32 S3非取字模和刷写中文固件方式显示中文_micropython esp32s3

#挂载字库
font = BMFont(“fonts/unifont-14-12888-16.v3.bmf”)
#扫描I2C器件地址并反馈
print(“%#x”%i2c.scan()[0])

def main():

#显示文本字体可调节8-64
font.text(oled,"Welcome to 中国上海。",0,0,color=1,font_size=16,reverse=False,reverse=False,clear=False,show=True,auto_wrap=True)

#官方基本字符显示
#oled.text("nihao",0,0)
#oled.show()

while True:
    #动态数字显示
    for i in range(100):
        font.text(oled,"num = %.2d"%i,60,42,color=1,font_size=16,reverse=False,reverse=False,clear=False,show=True,auto_wrap=True)
        time.sleep(0.5)

if name == “main”:
main()

显示效果：


![](https://img-blog.csdnimg.cn/8c7b23b1add14000b01c94ad45ad3113.png)


**五、示例代码中的字库和ssd1306驱动下载地址**


ufont.py

version = 3

import time
import struct

import framebuf

DEBUG = False

def timeit(f, *args, **kwargs):
try:
myname = str(f).split(’ ')[1]
except:
myname = “UNKONW”

def new_func(*args, **kwargs):
    if DEBUG:
        try:
            t = time.ticks_us()
            result = f(*args, **kwargs)
            delta = time.ticks_diff(time.ticks_us(), t)
            print('Function {} Time = {:6.3f}ms'.format(myname, delta / 1000))
        except AttributeError:
            t = time.perf_counter_ns()
            result = f(*args, **kwargs)
            delta = time.perf_counter_ns() - t
            print('Function {} Time = {:6.3f}ms'.format(myname, delta / 1000000))
        return result
    else:
        return f(*args, **kwargs)

return new_func

class BMFont:
@staticmethod
def _list_to_byte(arr):
b = 0
for a in arr:
b = (b << 1) + a
return bytes([b])

@timeit
def _bit_list_to_byte_data(self, bit_list):
    """将点阵转换为字节数据

    Args:
        bit_list:

    Returns:

    """
    byte_data = b''
    for _col in bit_list:
        for i in range(0, len(_col), 8):
            byte_data += self._list_to_byte(_col[i:i + 8])
    return byte_data

@timeit
def __init__(self, font_file):
    self.font_file = font_file

    self.font = open(font_file, "rb", buffering=0xff)

    self.bmf_info = self.font.read(16)

    if self.bmf_info[0:2] != b"BM":
        raise TypeError("字体文件格式不正确: " + font_file)

    self.version = self.bmf_info[2]
    if self.version != 3:
        raise TypeError("字体文件版本不正确: " + str(self.version))

    self.map_mode = self.bmf_info[3]  # 映射方式
    self.start_bitmap = struct.unpack(">I", b'\x00' + self.bmf_info[4:7])[0]  # 位图开始字节
    self.font_size = self.bmf_info[7]  # 字体大小
    self.bitmap_size = self.bmf_info[8]  # 点阵所占字节

@timeit
def _to_bit_list(self, byte_data, font_size, *, _height=None, _width=None):
    """将字节数据转换为点阵数据

    Args: