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These interfaces don't include the ones that are typically used in products addressing industrial applications: I2C bus, SPI bus, UARTs, etc. However, as Android popularity is growing outside the mobile world too, Google defined a set of additional APIs to standardize the access to these interfaces as well. These new APIs are part of the [https://developer.android.com/things/index.html Android Things project].
This Technical Note describes the implementation of the [https://developer.android.com/things/sdk/pio/spi.html APIs related to the SPI bus] to access the SPI bus TBD SPI4 of the SBCX platformin the form of a native library. The solution was tested with Android 4.4.3.
==Testbed==
=== Wiring ===
{| class="wikitable"
!Nor
=== Example project===
An [[#Downloads example project]] is provided to illustrate how to use of the native library. It includes the library itself and a simple application which reads the identification code of the flash memory.==== Managing the device connection ====
In order to open a connection to a particular SPI slave, you need to know the unique name of the bus. The get this name,
run the following command from the serial console:
</pre>
==== Configuring clock and data modes ====
Configuration method are identical to the Andriod Things api [https://developer.android.com/things/sdk/pio/spi.html#mode ref].
