firt commit

README.md

@@ -0,0 +1,32 @@
+# LCD backlight test
+
+This program only turns on the LCD backlight GPIO.
+
+It does not initialize SPI.
+It does not initialize the LCD controller.
+It does not write any pixel data.
+
+Set `LCD_PIN_BL` to the GPIO connected to the LCD `BLK` pin.
+Set `LCD_BL_ACTIVE_HIGH` to match the board.
+
+Build and flash:
+
+```powershell
+idf.py menuconfig
+idf.py build
+idf.py -p COMx flash
+```
+
+Expected result: the LCD backlight turns on and stays on.
+
+## Update image data
+
+Use this script to generate `main/eye_image.c` and `main/eye_image.h` from an
+image or GIF:
+
+```powershell
+C:\Users\28036\.cache\codex-runtimes\codex-primary-runtime\dependencies\python\python.exe D:\esp\Project\lcd\tools\gif_to_eye_image.py D:\esp\Project\lcd\source\eye2.bmp
+```
+
+For GIF files, use `--max-frames` or `--step` if the generated file is too
+large.