Migrated to arduino

2025-12-25 15:37:12 +01:00
parent 692320a635
commit ce6a2b9185
6 changed files with 126 additions and 0 deletions
--- a/esp32-lora/light-sensor-python/ssd1306.py
+++ b/esp32-lora/light-sensor-python/ssd1306.py
@@ -0,0 +1,71 @@
+# MicroPython SSD1306 OLED driver, I2C interface
+
+from micropython import const
+import framebuf
+
+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_I2C(framebuf.FrameBuffer):
+    def __init__(self, width, height, i2c, addr=0x3C):
+        self.width = width
+        self.height = height
+        self.i2c = i2c
+        self.addr = addr
+        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 write_cmd(self, cmd):
+        self.i2c.writeto(self.addr, bytearray([0x80, cmd]))
+
+    def write_data(self, buf):
+        self.i2c.writeto(self.addr, bytearray([0x40]) + buf)
+
+    def init_display(self):
+        for cmd in (
+            SET_DISP | 0x00,
+            SET_MEM_ADDR, 0x00,
+            SET_DISP_START_LINE | 0x00,
+            SET_SEG_REMAP | 0x01,
+            SET_MUX_RATIO, self.height - 1,
+            SET_COM_OUT_DIR | 0x08,
+            SET_DISP_OFFSET, 0x00,
+            SET_COM_PIN_CFG, 0x12,
+            SET_DISP_CLK_DIV, 0x80,
+            SET_PRECHARGE, 0xF1,
+            SET_VCOM_DESEL, 0x30,
+            SET_CONTRAST, 0xFF,
+            SET_ENTIRE_ON,
+            SET_NORM_INV,
+            SET_CHARGE_PUMP, 0x14,
+            SET_DISP | 0x01,
+        ):
+            self.write_cmd(cmd)
+        self.fill(0)
+        self.show()
+
+    def show(self):
+        self.write_cmd(SET_COL_ADDR)
+        self.write_cmd(0)
+        self.write_cmd(self.width - 1)
+        self.write_cmd(SET_PAGE_ADDR)
+        self.write_cmd(0)
+        self.write_cmd(self.pages - 1)
+        self.write_data(self.buffer)