Package com.diozero.internal.spi

Interface SpiDeviceFactoryInterface

All Superinterfaces:

AutoCloseable, Closeable, DeviceFactoryInterface

All Known Subinterfaces:

NativeDeviceFactoryInterface

All Known Implementing Classes:

BaseNativeDeviceFactory, DefaultDeviceFactory

public interface SpiDeviceFactoryInterface
extends DeviceFactoryInterface

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_SPI_BUFFER_SIZE	Many distributions have a maximum SPI transfer of 4096 bytes.
static String	SPI_PREFIX

Method Summary

Modifier and Type	Method	Description
InternalSpiDeviceInterface	createSpiDevice(String key, int controller, int chipSelect, int frequency, SpiClockMode spiClockMode, boolean lsbFirst)
static String	createSpiKey(String keyPrefix, int controller, int chipSelect)
default int	getSpiBufferSize()
default InternalSpiDeviceInterface	provisionSpiDevice(int controller, int chipSelect, int frequency, SpiClockMode spiClockMode, boolean lsbFirst)

Methods inherited from interface com.diozero.internal.spi.DeviceFactoryInterface

close, createI2CKey, createPinKey, createSerialKey, createSpiKey, deviceClosed, deviceOpened, getBoardPinInfo, getDevice, getName, isClosed, isDeviceOpened, reopen, start

Field Detail

DEFAULT_SPI_BUFFER_SIZE

static final int DEFAULT_SPI_BUFFER_SIZE

Many distributions have a maximum SPI transfer of 4096 bytes. This can be changed in /boot/cmdline.txt by appending spidev.bufsiz=32768

See Also:

Constant Field Values

SPI_PREFIX

static final String SPI_PREFIX

See Also:

Constant Field Values

Method Detail

provisionSpiDevice

default InternalSpiDeviceInterface provisionSpiDevice(int controller,
                                                      int chipSelect,
                                                      int frequency,
                                                      SpiClockMode spiClockMode,
                                                      boolean lsbFirst)
                                               throws RuntimeIOException

Throws:

RuntimeIOException

createSpiDevice

InternalSpiDeviceInterface createSpiDevice(String key,
                                           int controller,
                                           int chipSelect,
                                           int frequency,
                                           SpiClockMode spiClockMode,
                                           boolean lsbFirst)
                                    throws RuntimeIOException

Throws:

RuntimeIOException

getSpiBufferSize

default int getSpiBufferSize()

createSpiKey

static String createSpiKey(String keyPrefix,
                           int controller,
                           int chipSelect)