Install CircuitPython firmware on Raspberry Pi Pico

As Raspberry Pi Pico released with MicroPython supported officially, CircuitPython also support Pico. It's CircuitPython 6.2.0-beta.1 currently.

To flash CircuitPython firmware on Raspberry Pi Pico:

Visit https://circuitpython.org/, search "Pico by Raspberry Pi" and download the firmware (.UF2).

Hold down Raspberry Pi Pico on-board BOOTSEL button while plugging it into USB (or pulling down the RUN/Reset pin to ground) and it will appear as a USB disk drive you can drag the firmware onto.

more exercises for Raspberry Pi Pico/CircuitPython:

~ Raspberry Pi Pico/CircuitPython + ST7789 SPI IPS LCD

~ Raspberry Pi Pico/CircuitPython + ssd1306 I2C OLED

~ RPi Pico/CircuitPython x AHT20+BMP280 (Temperature, Humidity and Pressure Sensor Module), display on ssd1306 I2C OLED

~ Raspberry Pi Pico/CircuitPython + ILI9341 SPI Display with Touch

~ Raspberry Pi Pico/CircuitPython + ESP32/adafruit nina-fw (act as WiFi/BLE Co-Processor)

~ Get sys info

~ ST7789 SPI (2" 240x320/1.54" 240x240) IPS RGB Display, on Raspberry Pi Pico/CircuitPython

~ ov7670/ov2640 + ST7789 (IPS Display) on Raspberry Pi Pico/CircuitPython 7.0.0 alpha 6

~ CircuitPython 7.0.0 run on Raspberry Pi Pico RP2040

~ Raspberry Pi Pico/CircuitPython, access LSM303(Accelerometer/Magnetometer) and L3GD20(Gyroscope)
~ act as IMU USB Mouse, read LSM303 Accelerometer and report as mouse movement
~ display cursor on displayio, work on Raspberry Pi Pico/ST7789 SPI Display.