添加 SSD1315 驱动

Author: funnygeeker

drivers/ssd1315_buf.mpy

@@ -0,0 +1,239 @@
+# MicroPython SSD1315 OLED driver, I2C and SPI interfaces
+import math
+import framebuf
+from micropython import const
+
+# 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)
+
+
+# Subclassing FrameBuffer provides support for graphics primitives
+# http://docs.micropython.org/en/latest/pyboard/library/framebuf.html
+class SSD1315(framebuf.FrameBuffer):
+    def __init__(self, width, height, external_vcc):
+        self.width = width
+        self.height = height
+        self.external_vcc = external_vcc
+        self.pages = self.height // 8
+        self.buffer = bytearray(self.pages * self.width)
+        super().__init__(self.buffer, self.width, self.height, framebuf.MONO_VLSB)
+        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.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)
+
+    def back_light(self, value):
+        """
+        背光调节
+
+        Args:
+            value: 背光等级 0 ~ 255
+        """
+        self.contrast(value)
+
+
+class SSD1315_I2C(SSD1315):
+    def __init__(self, width, height, i2c, addr=0x3D, 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)
+
+    def circle(self, center, radius, c, section=100):
+        """
+        画圆
+
+        Args:
+            c: 颜色
+            center: 中心(x, y)
+            radius: 半径
+            section: 分段
+        """
+        arr = []
+        for m in range(section + 1):
+            x = round(radius * math.cos((2 * math.pi / section) * m - math.pi) + center[0])
+            y = round(radius * math.sin((2 * math.pi / section) * m - math.pi) + center[1])
+            arr.append([x, y])
+        for i in range(len(arr) - 1):
+            self.line(*arr[i], *arr[i + 1], c)
+
+    def fill_circle(self, center, radius, c):
+        """
+        画填充圆
+
+        Args:
+            c: 颜色
+            center: 中心(x, y)
+            radius: 半径
+        """
+        rsq = radius * radius
+        for x in range(radius):
+            y = int(math.sqrt(rsq - x * x))  # 计算 y 坐标
+            y0 = center[1] - y
+            end_y = y0 + y * 2
+            y0 = max(0, min(y0, self.height))  # 将 y0 限制在画布的范围内
+            length = abs(end_y - y0) + 1
+            self.vline(center[0] + x, y0, length, c)  # 绘制左右两侧的垂直线
+            self.vline(center[0] - x, y0, length, c)
+
+
+
+class SSD1315_SPI(SSD1315):
+    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)
+
+    def circle(self, center, radius, c, section=100):
+        """
+        画圆
+
+        Args:
+            c: 颜色
+            center: 中心(x, y)
+            radius: 半径
+            section: 分段
+        """
+        arr = []
+        for m in range(section + 1):
+            x = round(radius * math.cos((2 * math.pi / section) * m - math.pi) + center[0])
+            y = round(radius * math.sin((2 * math.pi / section) * m - math.pi) + center[1])
+            arr.append([x, y])
+        for i in range(len(arr) - 1):
+            self.line(*arr[i], *arr[i + 1], c)
+
+    def fill_circle(self, center, radius, c):
+        """
+        画填充圆
+
+        Args:
+            c: 颜色
+            center: 中心(x, y)
+            radius: 半径
+        """
+        rsq = radius * radius
+        for x in range(radius):
+            y = int(math.sqrt(rsq - x * x))  # 计算 y 坐标
+            y0 = center[1] - y
+            end_y = y0 + y * 2
+            y0 = max(0, min(y0, self.height))  # 将 y0 限制在画布的范围内
+            length = abs(end_y - y0) + 1
+            self.vline(center[0] + x, y0, length, c)  # 绘制左右两侧的垂直线
+            self.vline(center[0] - x, y0, length, c)