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项目作者： martin96

项目描述 ：
Android Things driver for the PiFace Digital 2
高级语言： Java
项目地址: git://github.com/martin96/androidthings-PiFaceDigital2-driver.git


androidthings-PiFaceDigital2-driver

This repository contains the Android Things driver to control the MCP23S17 chip on the PiFace Digital 2.

Only tested with a Raspberry Pi 3, but shouldn’t be hard to adapt for other boards too.

PiFace Digital 2

Image of PiFace Digital 2

PiFace Digital has eight inputs, eight outputs, eight LED’s, two relays and four switches.

Using

To use it in your Android Things project:

  1. PiFaceDigital2 mPiFaceDigital2 = PiFaceDigital2.create(SPI_DEVICE_NAME);
  3. // The LED’s are connected in parallel to each of the outputs
  4. // This means that when you set output pin 4 high, LED 4 illuminates
  5. mPiFaceDigital2.setOutputPin(4, true);
  6. mPiFaceDigital2.setLED(4, true);
  8. // The two Relays are connected in parallel to output pins 0 and 1 respectively.
  9. // When you set output pin 0 high, LED 0 illuminates and Relay 0 activates.
  10. mPiFaceDigital2.setOutputPin(0, true);
  11. mPiFaceDigital2.setLED(0, true);
  12. mPiFaceDigital2.setRelay(0, true);
  14. // Later on
  15. mPiFaceDigital2.close();

More info on the MCP23S17: http://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf