Initial pico w port

README.md

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+# E-Ink F1 Display
+
+## Raspberry Pi Pico W (Arduino)
+
+This project targets the Raspberry Pi Pico W using the Arduino-Pico core
+through PlatformIO and the Waveshare 4.2-inch V2 display. The display GPIO
+assignments are in `include/config.h`.
+
+1. Copy `src/secrets.h.example` to `src/secrets.h` and set your Wi-Fi SSID and
+   password. The actual `src/secrets.h` is ignored by Git.
+2. Build with `pio run -e pico_w`.
+3. Upload with `pio run -e pico_w -t upload`.
+4. Open the serial monitor with `pio device monitor -e pico_w`.
+
+The display uses GPIO 8 (DC), GPIO 9 (CS), GPIO 10 (SCK), GPIO 11 (MOSI),
+GPIO 12 (RST), and GPIO 13 (BUSY).