I2C class

I2C wrapper functions for Linux userspace i2c-dev devices.

c-periphery I2C documentation.

Inheritance

• Object
• IsolateAPI
• I2C

Constructors

I2C(int busNum)

Opens the i2c-dev device at the specified path (e.g. "/dev/i2c-busNum").

I2C.isolate(String json)

Duplicates an existing I2C from a JSON string. This special constructor is used to transfer an existing I2C to an other isolate.

Properties

busNum → int

final

hashCode → int

The hash code for this object.

no setter, inherited

isolate → bool

final

path → String

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

dispose() → void

Releases all internal native resources.

fromJson(String json) → IsolateAPI

override

getErrno() → int

Returns the libc errno of the last failure that occurred.

getHandle() → int

Returns the address of the internal handle.

override

getI2Cfd() → int

Returns the file descriptor (for the underlying i2c-dev device) of the I2C handle.

getI2Cinfo() → String

Returns a string representation of the I2C handle.

isIsolate() → bool

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

readByte(int address) → int

Reads a byte from the I2C device with the address. The optional register parameters bit order/width enables 16-bit register.

readByteReg(int address, int register, [BitOrder order = BitOrder.msbLast, RegisterWidth width = RegisterWidth.bits8]) → int

Reads a byte from register of the I2C device with the address.

readBytes(int address, int len) → List<int>

Reads len bytes from the I2C device with the address.

readBytesReg(int address, int register, int len, [BitOrder order = BitOrder.msbLast, RegisterWidth width = RegisterWidth.bits8]) → List<int>

Reads len bytes from register of the I2C device with the address.

readWord(int address, [BitOrder order = BitOrder.msbLast, RegisterWidth width = RegisterWidth.bits8]) → int

Reads a word from the I2C device with the address and the bit order].

readWordReg(int address, int register, [BitOrder order = BitOrder.msbLast, RegisterWidth width = RegisterWidth.bits8]) → int

Reads a word from register of the I2C device with the address with the bit order.

setHandle(int handle) → void

Set the address of the internal handle.

override

toJson() → String

Converts a I2C to a JSON string. See constructor isolate for details.

override

toString() → String

A string representation of this object.

inherited

transfer(List<I2Cmsg> data) → NativeI2CmsgHelper

Transfers a list of I2Cmsg.

writeByte(int address, int byteValue) → void

Writes a byteValue to the I2C device with the address.

writeByteReg(int address, int register, int byteValue, [BitOrder order = BitOrder.msbLast, RegisterWidth width = RegisterWidth.bits8]) → void

Writes a byteValue to the register of the I2C device with the address. The optional register parameters bit order/width enables 16-bit register.

writeBytes(int address, List<int> byteData) → void

Writes byteData to the I2C device with the address.

writeBytesReg(int address, int register, List<int> byteData, [BitOrder order = BitOrder.msbLast, RegisterWidth width = RegisterWidth.bits8]) → void

Writes byteData to the register of the I2C device with the address The optional register parameters bit order/width enables 16-bit registers.

writeUint8Reg(int address, int register, Uint8List byteData, [BitOrder order = BitOrder.msbLast, RegisterWidth width = RegisterWidth.bits8]) → void

writeWord(int address, int wordValue, [BitOrder order = BitOrder.msbLast]) → void

Writes a wordValue to the I2C device with the address and the bit order.

writeWordReg(int address, int register, int wordValue, [BitOrder order = BitOrder.msbLast, RegisterWidth width = RegisterWidth.bits8]) → void

Writes a wordValue to the register of the I2C device with the address and the bit order. The optional register parameters bit width enables 16-bit register.

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

getI2CerrorCode(int value) → I2CerrorCode

Converts the native error code value to I2CerrorCode.

i2cMsgFlags2Int(I2CmsgFlags flag) → int

Converts I2CmsgFlags to the native bit mask value.