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/*
* Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package jdk.dio.spibus;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Objects;
import com.oracle.dio.impl.Platform;
import com.oracle.dio.utils.Utils;
import jdk.dio.DeviceConfig;
import jdk.dio.DeviceManager;
import jdk.dio.InvalidDeviceConfigException;
import romizer.DontRenameMethod;
import serializator.*;
/**
* The {@code SPIDeviceConfig} class encapsulates the hardware addressing information, and static and dynamic
* configuration parameters of an SPI slave device.
*
* Some hardware addressing, static or dynamic configuration parameters may be
* set to {@link #UNASSIGNED UNASSIGNED} or {@code null} (see
* Unassigned, Default or Unused Parameter Values).
*
* SPI Clock Modes
* The clock mode is a number from 0 to 3 which represents the combination of the CPOL (SPI Clock Polarity Bit) and CPHA
* (SPI Clock Phase Bit) signals where CPOL is the high order bit and CPHA is the low order bit:
*
*
* Mode
* CPOL
* CPHA
*
*
* 0
* 0 = Active-high clocks selected.
* 0 = Sampling of data occurs at odd edges of the SCK clock
*
*
* 1
* 0 = Active-high clocks selected.
* 1 = Sampling of data occurs at even edges of the SCK clock
*
*
* 2
* 1 = Active-low clocks selected.
* 0 = Sampling of data occurs at odd edges of the SCK clock
*
*
* 3
* 1 = Active-low clocks selected.
* 1 = Sampling of data occurs at even edges of the SCK clock
*
*
*
* An instance of {@code SPIDeviceConfig} can be passed to the {@link DeviceManager#open(DeviceConfig) open(DeviceConfig, ...)} and
* {@link DeviceManager#open(Class, DeviceConfig) open(Class, DeviceConfig, ...)}
* methods of the {@link DeviceManager} to open the designated SPI slave device with the
* specified configuration. A {@link InvalidDeviceConfigException} is thrown when attempting to open a
* device with an invalid or unsupported configuration.
*
*
* @see DeviceManager#open(DeviceConfig)
* @see DeviceManager#open(DeviceConfig, int)
* @see DeviceManager#open(Class, DeviceConfig)
* @see DeviceManager#open(Class, DeviceConfig, int)
* @since 1.0
*/
@SerializeMe
@apimarker.API("device-io_1.1_spibus")
public final class SPIDeviceConfig implements DeviceConfig, DeviceConfig.HardwareAddressing {
/**
* High Chip Select active level.
*/
public static final int CS_ACTIVE_HIGH = 0;
/**
* Low Chip Select active level.
*/
public static final int CS_ACTIVE_LOW = 1;
/**
* Chip Select not controlled by driver. If this mode is configured, the Chip Select signal
* is assumed to be controlled independently such as with an independent {@link jdk.dio.gpio.GPIOPin GPIOPin}.
*/
public static final int CS_NOT_CONTROLLED = 2;
private String controllerName;
private int address = UNASSIGNED;
private int csActive = UNASSIGNED;
private int controllerNumber = UNASSIGNED;
private int bitOrdering = UNASSIGNED;
private int clockFrequency = UNASSIGNED;
private int clockMode;
private int wordLength = UNASSIGNED;
private int inputBufferSize = UNASSIGNED;
private int outputBufferSize = UNASSIGNED;
/**
* The {@code Builder} class allows for creating and initializing
* {@code SPIDeviceConfig} objects. Calls can be chained in the following
* manner:
*
*
* SPIDeviceConfig config = new SPIDeviceConfig.Builder()
* .setControllerNumber(1)
* .setAddress(0x8)
* .setClockFrequency(8000000)
* .setClockMode(2)
* .setWordLength(10)
* .setBitOrdering(LITTLE_ENDIAN)
* .build();
*
*
*
* @since 1.1
*/
@apimarker.API("device-io_1.1_spibus")
public static final class Builder {
private final SPIDeviceConfig instance = new SPIDeviceConfig();
/**
* Creates a new {@code Builder} instance.
*/
public Builder() {
}
/**
* Creates a new {@code SPIDeviceConfig} instance initialized with the
* values set for each configuration parameters. If a configuration
* parameter was not explictly set its default value will be used.
*
* @return a new initialized {@code SPIDeviceConfig} instance.
* @throws IllegalStateException if any of the following is true:
*
* - the Chip Select address of the slave device on the bus is not set.
*
*/
public SPIDeviceConfig build() {
if (UNASSIGNED == instance.address) {
throw new IllegalStateException();
}
return instance;
}
/**
* Sets the name of the bus the slave device is connected to (default
* value is {@code null} if not set).
*
* @param controllerName the name of the bus the slave device is
* connected to (such as its device file name on UNIX systems) or {@code null}.
* @return this {@code Builder} instance.
*/
public Builder setControllerName(String controllerName) {
instance.controllerName = controllerName;
return this;
}
/**
* Sets the Chip Select address of the slave device on the bus.
*
* @param address the Chip Select address of the slave device on the bus
* (a positive or zero integer).
* @return this {@code Builder} instance.
* @throws IllegalArgumentException if any of the following is true:
*
* - {@code address} is not in the defined range;
*
*/
public Builder setAddress(int address) {
Utils.checkIntZeroOrPozitive(address);
instance.address = address;
return this;
}
/**
* Sets the number of the bus the slave device is connected to (default
* value is {@code UNASSIGNED} if not set).
*
* @param controllerNumber the number of the bus the slave device is
* connected to (a positive or zero integer) or {@link #UNASSIGNED UNASSIGNED}.
* @return this {@code Builder} instance.
* @throws IllegalArgumentException if {@code controllerNumber} is not
* in the defined range.
*/
public Builder setControllerNumber(int controllerNumber) {
Utils.checkIntValue(controllerNumber);
instance.controllerNumber = controllerNumber;
return this;
}
/**
* Sets the requested input buffer size (default value is
* {@code UNASSIGNED} if not set).
*
* @param inputBufferSize the requested input buffer size in number of
* samples (a positive or zero integer) or
* {@code UNASSIGNED}.
* @return this {@code Builder} instance.
* @throws IllegalArgumentException if {@code inputBufferSize} is not in
* the defined range.
*/
public Builder setInputBufferSize(int inputBufferSize) {
Utils.checkIntValue(inputBufferSize);
instance.inputBufferSize = inputBufferSize;
return this;
}
/**
* Sets the requested output buffer size (default value is
* {@code UNASSIGNED} if not set).
*
* @param outputBufferSize the requested output buffer size in number of
* samples (a positive or zero integer) or
* {@code UNASSIGNED}.
* @return this {@code Builder} instance.
* @throws IllegalArgumentException if {@code outputBufferSize} is not
* in the defined range.
*/
public Builder setOutputBufferSize(int outputBufferSize) {
Utils.checkIntValue(outputBufferSize);
instance.outputBufferSize = outputBufferSize;
return this;
}
/**
* Sets the Chip Select active level (default value is
* {@code UNASSIGNED} if not set).
*
* @param csActive the Chip Select active level, one of {@link #CS_ACTIVE_LOW},
* {@link #CS_ACTIVE_HIGH}, {@link #CS_NOT_CONTROLLED} or
* {@link #UNASSIGNED UNASSIGNED}.
* @return this {@code Builder} instance.
* @throws IllegalArgumentException if {@code csActive} is not in the
* defined range.
*/
public Builder setCSActiveLevel(int csActive) {
checkCsActive(csActive);
instance.csActive = csActive;
return this;
}
/**
* Sets the bit (shifting) ordering of the slave device (default value
* is {@code UNASSIGNED} if not set).
*
* @param bitOrdering the bit (shifting) ordering of the slave device,
* one of: {@link SPIDevice#BIG_ENDIAN},
* {@link SPIDevice#LITTLE_ENDIAN}, {@link SPIDevice#MIXED_ENDIAN} or
* {@link #UNASSIGNED UNASSIGNED}.
* @return this {@code Builder} instance.
* @throws IllegalArgumentException if {@code bitOrdering} is not in the
* defined range.
*/
public Builder setBitOrdering(int bitOrdering) {
checkBitOrdering(bitOrdering);
instance.bitOrdering = bitOrdering;
return this;
}
/**
* Sets the clock mode (default value is {@code 0} if not set).
*
* @param clockMode the clock mode, one of:
* {@code 0}, {@code 1}, {@code 2} or {@code 3} (see SPI
* Clock Modes).
* @return this {@code Builder} instance.
* @throws IllegalArgumentException if {@code clockMode} is not in the
* defined range.
*/
public Builder setClockMode(int clockMode) {
checkClockMode(clockMode);
instance.clockMode = clockMode;
return this;
}
/**
* Sets the word length of the slave device (default value is
* {@code UNASSIGNED} if not set).
*
* @param wordLength the word length of the slave device (a positive
* integer) or {@link #UNASSIGNED UNASSIGNED}.
* @return this {@code Builder} instance.
* @throws IllegalArgumentException if {@code wordLength} is not in the
* defined range.
*/
public Builder setWordLength(int wordLength) {
Utils.checkGreaterThanZero(wordLength);
instance.wordLength = wordLength;
return this;
}
/**
* Sets the clock frequency of the slave device in Hz (default value is
* {@code UNASSIGNED} if not set).
*
* @param clockFrequency the clock frequency of the slave device in Hz
* (a positive integer) or {@link #UNASSIGNED UNASSIGNED}.
* @return this {@code Builder} instance.
* @throws IllegalArgumentException if {@code clockFrequency} is not in
* the defined range.
*/
public Builder setClockFrequency(int clockFrequency) {
Utils.checkGreaterThanZero(clockFrequency);
instance.clockFrequency = clockFrequency;
return this;
}
}
// hidden constructor for serializer
@DontRenameMethod
SPIDeviceConfig(){}
/**
* Creates a new {@code SPIDeviceConfig} with the specified hardware addressing information and configuration
* parameters. The Chip Select active level is platform and/or driver-dependent (i.e. {@link #UNASSIGNED UNASSIGNED}).
*
* The controller name is set to {@code null}.
* The requested input and output buffer sizes are set to {@code UNASSIGNED}.
*
*
* @param controllerNumber
* the number of the bus the slave device is connected to (a positive or zero integer) or
* {@link #UNASSIGNED UNASSIGNED}.
* @param address
* the Chip Select address of the slave device on the bus (a positive or zero integer).
* @param clockFrequency
* the clock frequency of the slave device in Hz (a positive integer) or {@link #UNASSIGNED UNASSIGNED}.
* @param clockMode
* the clock mode, one of: {@code 0}, {@code 1}, {@code 2} or {@code 3} (see SPI Clock
* Modes).
* @param wordLength
* the word length of the slave device (a positive integer) or {@link #UNASSIGNED UNASSIGNED}.
* @param bitOrdering
* the bit (shifting) ordering of the slave device, one of: {@link SPIDevice#BIG_ENDIAN},
* {@link SPIDevice#LITTLE_ENDIAN}, {@link SPIDevice#MIXED_ENDIAN} or {@link #UNASSIGNED UNASSIGNED}.
* @throws IllegalArgumentException
* if any of the following is true:
*
* - {@code controllerNumber} is not in the defined range;
* - {@code address} is not in the defined range;
* - {@code clockFrequency} is not in the defined range;
* - {@code clockMode} is not one of the defined values;
* - {@code wordLength} is not in the defined range;
* - {@code bitOrdering} is not one of the defined values.
*
*
* @deprecated As of 1.1, use {@link Builder} instead.
*/
@Deprecated
public SPIDeviceConfig(int controllerNumber, int address, int clockFrequency, int clockMode, int wordLength,
int bitOrdering) {
this(controllerNumber, address, UNASSIGNED, clockFrequency, clockMode, wordLength, bitOrdering);
}
/**
* Creates a new {@code SPIDeviceConfig} with the specified hardware addressing information and configuration
* parameters.
*
* The controller name is set to {@code null}.
* The requested input and output buffer sizes are set to {@code UNASSIGNED}.
*
*
* @param controllerNumber
* the number of the bus the slave device is connected to (a positive or zero integer) or
* {@link #UNASSIGNED UNASSIGNED}.
* @param address
* the Chip Select address of the slave device on the bus (a positive or zero integer).
* @param csActive
* the Chip Select active level, one of {@link #CS_ACTIVE_LOW},
* {@link #CS_ACTIVE_HIGH}, {@link #CS_NOT_CONTROLLED} or {@link #UNASSIGNED UNASSIGNED}.
* @param clockFrequency
* the clock frequency of the slave device in Hz (a positive integer) or {@link #UNASSIGNED UNASSIGNED}.
* @param clockMode
* the clock mode, one of: {@code 0}, {@code 1}, {@code 2} or {@code 3} (see SPI Clock
* Modes).
* @param wordLength
* the word length of the slave device (a positive integer) or {@link #UNASSIGNED UNASSIGNED}.
* @param bitOrdering
* the bit (shifting) ordering of the slave device, one of: {@link SPIDevice#BIG_ENDIAN},
* {@link SPIDevice#LITTLE_ENDIAN}, {@link SPIDevice#MIXED_ENDIAN} or {@link #UNASSIGNED UNASSIGNED}.
* @throws IllegalArgumentException
* if any of the following is true:
*
* - {@code controllerNumber} is not in the defined range;
* - {@code address} is not in the defined range;
* - {@code clockFrequency} is not in the defined range;
* - {@code clockMode} is not one of the defined values;
* - {@code wordLength} is not in the defined range;
* - {@code bitOrdering} is not one of the defined values.
*
*
* @deprecated As of 1.1, use {@link Builder} instead.
*/
@Deprecated
public SPIDeviceConfig(int controllerNumber, int address, int csActive, int clockFrequency, int clockMode, int wordLength,
int bitOrdering) {
this.controllerNumber = controllerNumber;
this.address = address;
this.csActive = csActive;
this.clockFrequency = clockFrequency;
this.clockMode = clockMode;
this.wordLength = wordLength;
this.bitOrdering = bitOrdering;
checkParameters();
}
/**
* Creates a new {@code SPIDeviceConfig} with the specified hardware addressing information and configuration
* parameters. The Chip Select active level is platform and/or driver-dependent (i.e. {@link #UNASSIGNED UNASSIGNED}).
*
* The controller number is set to {@code UNASSIGNED}.
* The requested input and output buffer sizes are set to {@code UNASSIGNED}.
*
*
* @param controllerName
* the controller name (such as its device file name on UNIX systems).
* @param address
* the Chip Select address of the slave device on the bus (a positive or zero integer).
* @param clockFrequency
* the clock frequency of the slave device in Hz (a positive integer) or {@link #UNASSIGNED UNASSIGNED}.
* @param clockMode
* the clock mode, one of: {@code 0}, {@code 1}, {@code 2} or {@code 3} (see SPI Clock
* Modes).
* @param wordLength
* the word length of the slave device (a positive integer) or {@link #UNASSIGNED UNASSIGNED}.
* @param bitOrdering
* the bit (shifting) ordering of the slave device, one of: {@link SPIDevice#BIG_ENDIAN},
* {@link SPIDevice#LITTLE_ENDIAN}, {@link SPIDevice#MIXED_ENDIAN} or {@link #UNASSIGNED UNASSIGNED}.
* @throws IllegalArgumentException
* if any of the following is true:
*
* - {@code address} is not in the defined range;
* - {@code clockFrequency} is not in the defined range;
* - {@code clockMode} is not one of the defined values;
* - {@code wordLength} is not in the defined range;
* - {@code bitOrdering} is not one of the defined values.
*
* @throws NullPointerException
* if {@code controllerName} is {@code null}.
*
* @deprecated As of 1.1, use {@link Builder} instead.
*/
@Deprecated
public SPIDeviceConfig(String controllerName, int address, int clockFrequency, int clockMode, int wordLength,
int bitOrdering) {
this(controllerName, address, UNASSIGNED, clockFrequency, clockMode, wordLength, bitOrdering);
}
/**
* Creates a new {@code SPIDeviceConfig} with the specified hardware addressing information and configuration
* parameters.
*
* The controller number is set to {@code UNASSIGNED}.
* The requested input and output buffer sizes are set to {@code UNASSIGNED}.
*
*
* @param controllerName
* the controller name (such as its device file name on UNIX systems).
* @param address
* the Chip Select address of the slave device on the bus (a positive or zero integer).
* @param csActive
* the Chip Select active level, one of {@link #CS_ACTIVE_LOW},
* {@link #CS_ACTIVE_HIGH}, {@link #CS_NOT_CONTROLLED} or {@link #UNASSIGNED UNASSIGNED}.
* @param clockFrequency
* the clock frequency of the slave device in Hz (a positive integer) or {@link #UNASSIGNED UNASSIGNED}.
* @param clockMode
* the clock mode, one of: {@code 0}, {@code 1}, {@code 2} or {@code 3} (see SPI Clock
* Modes).
* @param wordLength
* the word length of the slave device (a positive integer) or {@link #UNASSIGNED UNASSIGNED}.
* @param bitOrdering
* the bit (shifting) ordering of the slave device, one of: {@link SPIDevice#BIG_ENDIAN},
* {@link SPIDevice#LITTLE_ENDIAN}, {@link SPIDevice#MIXED_ENDIAN} or {@link #UNASSIGNED UNASSIGNED}.
* @throws IllegalArgumentException
* if any of the following is true:
*
* - {@code address} is not in the defined range;
* - {@code clockFrequency} is not in the defined range;
* - {@code clockMode} is not one of the defined values;
* - {@code wordLength} is not in the defined range;
* - {@code bitOrdering} is not one of the defined values.
*
* @throws NullPointerException
* if {@code controllerName} is {@code null}.
*
* @deprecated As of 1.1, use {@link Builder} instead.
*/
@Deprecated
public SPIDeviceConfig(String controllerName, int address, int csActive, int clockFrequency, int clockMode, int wordLength,
int bitOrdering) {
this(UNASSIGNED, address, csActive, clockFrequency, clockMode, wordLength, bitOrdering);
// checks for null
controllerName.length();
this.controllerName = controllerName;
}
/**
* Creates a new {@code SPIDeviceConfig} whose state is deserialized from the specified {@code InputStream}.
* This method may be invoked to restore the state of a {@code SPIDeviceConfig}
* object from a persistent store.
*
* @param in the stream to read from.
* @return a new {@code SPIDeviceConfig} instance.
* @throws IOException if an I/O error occurs or if the provided stream does not
* contain a representation of a {@code SPIDeviceConfig} object.
*
* @since 1.1
*/
public static SPIDeviceConfig deserialize(InputStream in) throws IOException {
return (SPIDeviceConfig) Platform.deserialize(in);
}
/**
* Serializes the state of this {@code SPIDeviceConfig} object to the specified {@code OutputStream}.
* This method may be invoked by the {@link jdk.dio.DeviceManager DeviceManager}
* to save the state of this {@code SPIDeviceConfig} object to a persistent store.
*
* @param out the stream to write to.
* @throws IOException if an I/O error occurs.
*
* @since 1.1
*/
@Override
public int serialize(OutputStream out) throws IOException {
return Platform.serialize(this, out);
}
/**
* Gets the configured address of the SPI slave device.
*
* @return the Chip Select address of the slave device on the bus (a positive or zero integer).
*/
public int getAddress() {
return address;
}
/**
* Gets the configured controller number (the controller number of the SPI bus adapter the slave device is connected to).
*
* @return the controller number (a positive or zero integer) or {@link #UNASSIGNED UNASSIGNED}.
*/
@Override
public int getControllerNumber() {
return controllerNumber;
}
/**
* Gets the configured controller name (such as its device file name on UNIX systems).
*
* @return the controller name or {@code null}.
*/
@Override
public String getControllerName() {
return controllerName;
}
/**
* Gets the requested or allocated input buffer size. The platform/underlying
* driver may or may not allocate the requested size
* for the input buffer.
* When querying the configuration of an opened or registered device the
* allocated buffer size is returned.
*
* @return the requested or allocated input buffer size (a positive or zero integer) or {@link #UNASSIGNED UNASSIGNED}.
*
* @since 1.1
*/
public int getInputBufferSize() {
return inputBufferSize;
}
/**
* Gets the requested or allocated output buffer size. The platform/underlying
* driver may or may not allocate the requested size
* for the output buffer.
* When querying the configuration of an opened or registered device the
* allocated buffer size is returned.
*
* @return the requested or allocated output buffer size (a positive or zero integer) or {@link #UNASSIGNED UNASSIGNED}.
*
* @since 1.1
*/
public int getOutputBufferSize() {
return outputBufferSize;
}
/**
* Gets the configured bit (shifting) ordering of the SPI slave device.
*
* @return the bit ordering of the slave device, one of: {@link SPIDevice#BIG_ENDIAN},
* {@link SPIDevice#LITTLE_ENDIAN}, {@link SPIDevice#MIXED_ENDIAN} or {@link #UNASSIGNED UNASSIGNED}.
*/
public int getBitOrdering() {
return bitOrdering;
}
/**
* Gets the clock frequency (in Hz) supported by the SPI slave device.
*
* @return the clock frequency of the slave device in Hz (a positive integer) or {@link #UNASSIGNED UNASSIGNED}.
*/
public int getClockFrequency() {
return clockFrequency;
}
/**
* Gets the configured clock mode (combining clock polarity and phase) for communicating with the SPI slave device.
*
* @return the clock mode, one of: {@code 0}, {@code 1}, {@code 2} or {@code 3} (see SPI Clock
* Modes).
*/
public int getClockMode() {
return clockMode;
}
/**
* Gets the configured Chip Select active level for selecting the SPI slave device.
*
* @return the Chip Select active level,one of {@link #CS_ACTIVE_LOW},
* {@link #CS_ACTIVE_HIGH}, {@link #CS_NOT_CONTROLLED} or {@link #UNASSIGNED UNASSIGNED}.
*/
public int getCSActiveLevel() {
return csActive;
}
/**
* Gets the configured word length for communicating with the SPI slave device.
*
* @return the word length of the slave device (a positive integer) or {@link #UNASSIGNED UNASSIGNED}.
*/
public int getWordLength() {
return wordLength;
}
/**
* Returns the hash code value for this object.
*
* @return a hash code value for this object.
*/
@Override
public int hashCode() {
return Platform.hash(this, 7, 47);
}
/**
* Checks two {@code SPIDeviceConfig} objects for equality.
*
* @param obj
* the object to test for equality with this object.
*
* @return {@code true} if {@code obj} is a {@code SPIDeviceConfig} and has
* the same hardware addressing information and configuration parameter values
* as this {@code SPIDeviceConfig} object; {@code false} otherwise.
*/
@Override
public boolean equals(Object obj) {
return Platform.equals(this, obj);
}
private static void checkCsActive(int csActive) {
if (csActive < UNASSIGNED || csActive > CS_NOT_CONTROLLED) {
throw new IllegalArgumentException(Integer.toString(csActive));
}
}
private static void checkClockMode(int clockMode) {
if (clockMode < 0 || clockMode > 3) {
throw new IllegalArgumentException(Integer.toString(clockMode));
}
}
private static void checkBitOrdering(int bitOrdering) {
if (bitOrdering < UNASSIGNED || bitOrdering > SPIDevice.MIXED_ENDIAN) {
throw new IllegalArgumentException(Integer.toString(bitOrdering));
}
}
private void checkParameters(){
Utils.checkIntValue(controllerNumber);
Utils.checkIntZeroOrPozitive(address);
Utils.checkGreaterThanZero(clockFrequency);
checkCsActive(csActive);
checkClockMode(clockMode);
checkBitOrdering(bitOrdering);
Utils.checkGreaterThanZero(wordLength);
}
}
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