Banana Pro
by LeMaker
LeMaker Banana Pro is an updated version of its predecessor Banana Pi, a low-cost single-board computer.
The Banana Pro is a credit card-sized and low-power single-board computer developed in China by the LeMaker Team, with the goal of promoting STEM (science, technology, engineering and mathematics) education in schools.
Like its smaller sibling the Banana Pi, the Pro concept is heavily influenced by the Raspberry Pi, however the Banana Pro provides various enhancements over prior designs.
The Banana Pro has an Allwinner A20 system on a chip (SoC), which includes an ARM Cortex-A7 Dual-core (ARMv7-A) 1 GHz, Mali-400 MP2 GPU and 1GB DDR3 SDRAM.
The Banana Pro uses a microSD card for booting an OS, but also includes a SATA 2.0 interface to allow connection of a hard disk for additional storage, however you cannot boot from the hard disk.
Other differences from the Banana Pi include on-board Wi-Fi 802.11b/g/n AP6181, integrated composite video and audio output into a 3.5 mm TRRS jack. This makes space for a 40-pin extension header.
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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.