Python • EZ Start Kit+ OLED測試

CODE:

import machineimport ssd1306# 初始化I2Ci2c = machine.I2C(scl=machine.Pin(22), sda=machine.Pin(21))#i2c = machine.SoftI2C(scl=machine.Pin(22), sda=machine.Pin(21),freq=400000)# 初始化OLED顯示器oled = ssd1306.SSD1306_I2C(128, 64, i2c)# 清除顯示器oled.fill(0)# 在顯示器上顯示文本oled.text('Hello, World!', 0, 0)oled.show()

CODE:

# MicroPython SSD1306 OLED driver, I2C and SPI interfacesimport timeimport framebuf# register definitionsSET_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):        passclass 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()