While the Raspberry Pi has very good support for an I2C bus, a lot of very cool chips – including the in system programmer for just about every ATtiny and ATmega microcontroller – use an SPI bus.
Raspberry Pi Pico is a cute piece of hardware. It has a powerful dual-core RP2040 microcontroller that offers 2MB (up to 16MB) Flash and 264K SRAM memories. But what truly sets the Pico apart is its ...