Pi 2 Model B
by Raspberry Pi
Didn’t think the Raspberry Pi could get any better? You’re in for a big surprise! The Raspberry Pi 2 Model B is out and it’s amazing! With an upgraded ARM Cortex-A53 quad-core processor, Dual Core VideoCore IV Multimedia coprocessor, and a full Gigabyte of RAM, this pocket computer has moved from being a ‘toy’ to a real desktop PC!
The Raspberry Pi 2 Model B is the second-generation Raspberry Pi. It replaced the original Raspberry Pi 1 Model B+ in February 2015.
- A 900MHz quad-core ARM Cortex-A7 CPU
- 1GB RAM
- 100 Base Ethernet
- 4 USB ports
- 40 GPIO pins
- Full HDMI port
- Combined 3.5mm audio jack and composite video
- Camera interface (CSI)
- Display interface (DSI)
- Micro SD card slot
- VideoCore IV 3D graphics core
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Adafruit Blinka Installation
We use a special library called adafruit_blinka (named after Blinka, the CircuitPython mascot) to provide the layer that translates the CircuitPython hardware API to whatever library the Linux board provides.
For example, on Raspberry Pi we use the python RPi.GPIO library. For any I2C interfacing we'll use ioctl messages to the /dev/i2c device. For SPI we'll use the spidev python library, etc. These details don't matter so much because they all happen underneath the adafruit_blinka layer.