The MCP23017, a 16-bit I2C GPIO expander, has always been a tasty chip. With 16 GPIOs addressable over I2C, proper push/pull outputs, software-enabled pull-ups, eight addresses, maskable ...

Portanto, o diretório contendo o código fonte do projeto encontra-se no caminho /stm-gpio-expander/stm-exp, onde se encontra o projeto com a seguinte estrutura.

Terminal GPIO Expansion allows you to use both terminal blocks and GPIO with male & female header options. With this breakout board, you can quickly expand the Raspberry Pi Pico to industrial control, ...

The installed PiDP-11 I/O Expander Each expander board gives you 16 GPIO pins which can be accessed over I2C, including support for interrupts which has been connected to GPIO 19 on the Raspberry Pi.

The board includes a 3.2-inch 320 x 240 IPS TFT LCD connected via high-speed SPI and a 40-key mechanical keyboard scanned via an I2C GPIO expander. It also features an amplified 700mW speaker output ...

The Pico is connected to an AW9523 module, this is a GPIO expander which is convenient for this project as it doesn't require any resistors to operate LEDs. All the hardware, including the buttons ...