What’s Orange Pi R1？It’s an open-source single-board computer. It can run Android 4.4, Ubuntu, Debian Image. It uses the AllWinner H2 SoC, and has 256MB DDR3 SDRAM.
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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.