This is my first experience using this little board from Raspberry Pi Foundation.

I preferred to install CircuitPython on the board, but I came across the lack of usage examples (because the board was just released, obviously). Many of the examples on the Adafruit website have not yet been ported to the new board, so I am experimenting and making the necessary adaptations.

As they work, I'll share them here.

First, install CircuitPython in your little board. Just follow this guide:

https://learn.adafruit.com/getting-started-with-ra...

Second, download the CircuitPython Library Bundle:

https://github.com/adafruit/CircuitPython_Communit...

Third, install your favorite IDE (I preffer Thonny, but Adafruit indicates MU).

The connection is as simple as follows:

SSD1306 | Pico

VCC ---> Pin 36

GND ---> Any GND available

SDA ---> Pin 6 (GP4)

SCL ---> Pin 5 (GP5)

On the back of the Oled board there is an address indication and a jumper. In the case of my card, the addresses indicated are 0x7A or 0x7B. None of them work. The correct would be 0x3C.

In the Adafruit guide https://learn.adafruit.com/getting-started-with-r... there is an indication that calls to the I2C bus are executed through the BUSIO module.

No Default board Devices

The Pico does not label specific pins as the defaults to use for I2C, SPI, or UART connections.

I2C Example

To setup an I2C bus, you specify the SCL and SDA pins being used. You can look for "SCL" and "SDA" in the pin names in the pinout diagram above.

So, I use the code:

import board

import busio

i2c = busio.I2C (scl=board.GP5, sda=board.GP4) # This RPi Pico way to call I2C

The second piece of code I've found in this other guide:

https://learn.adafruit.com/adafruit-oled-featherwi... So, I've changed two things: the display resolution and I2C call...

# Adapting the example in https://learn.adafruit.com/adafruit-oled-featherwing/python-usage
# to use with Raspberry Pi Pico and CircuitPython


import board
import busio
import displayio
import terminalio
import adafruit_displayio_ssd1306
from adafruit_display_text import label


i2c = busio.I2C (scl=board.GP5, sda=board.GP4) # This RPi Pico way to call I2C


display_bus = displayio.I2CDisplay (i2c, device_address = 0x3C) # The address of my Board


display = adafruit_displayio_ssd1306.SSD1306(display_bus, width=128, height=64)
splash = displayio.Group(max_size=10)
display.show(splash)


color_bitmap = displayio.Bitmap(128, 64, 1) # Full screen white
color_palette = displayio.Palette(1)
color_palette[0] = 0xFFFFFF  # White
 
bg_sprite = displayio.TileGrid(color_bitmap, pixel_shader=color_palette, x=0, y=0)
splash.append(bg_sprite)
 
# Draw a smaller inner rectangle
inner_bitmap = displayio.Bitmap(118, 54, 1)
inner_palette = displayio.Palette(1)
inner_palette[0] = 0x000000  # Black
inner_sprite = displayio.TileGrid(inner_bitmap, pixel_shader=inner_palette, x=5, y=4)
splash.append(inner_sprite)
 
# Draw a label
text = "Nicolau dos"
text_area = label.Label(terminalio.FONT, text=text, color=0xFFFF00, x=28, y=15)
splash.append(text_area)


text = "Brinquedos"
text_area = label.Label(terminalio.FONT, text=text, color=0xFFFF00, x=32, y=25)
splash.append(text_area)
 
while True:
    pass

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