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--- development:python:micropython:oled [2024/08/15 15:10] – tungnt
+++ development:python:micropython:oled [2024/08/15 15:15] (current) – tungnt
@@ Line 6: / Line 6: @@
 {{ :development:python:esp32_oled.webp |}}
+**Thư viện:** [[https://github.com/1sitevn/esp32-micropython/blob/main/02.%20OLed/ssd1306.py|ssd1306.py]]
 <file python boot.py>
@@ Line 36: / Line 38: @@
   sleep(1)
 </file>
-<file python ssd1306.py>
-#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()
-</file>
 <file python oled.py>
@@ Line 260: / Line 91: @@
         self.oled.show()
 </file>
+{{ :development:python:micropython:2024-08-15_22.13.42.jpg |}}
+{{ :development:python:micropython:2024-08-15_22.13.50.jpg |}}