SPI class
SPI wrapper functions for Linux userspace spidev devices.
c-periphery SPI documentation.
Constructors
- SPI(int bus, int chip, SPImode mode, int maxSpeed)
- Opens the SPI device at the path ("/dev/spidevbus.chip"), with the specified SPI mode, specified maxSpeed in hertz, and the defaults of MSB_FIRST bit order, and 8 bits per word.
- SPI.isolate(String json)
- Duplicates an existing SPI from a JSON string. This special constructor is used to transfer an existing SPI to an other isolate.
- SPI.openAdvanced(int bus, int chip, SPImode mode, int maxSpeed, BitOrder bitOrder, int bitsPerWord, int extraFlags)
- Opens the SPI device at the specified path ("/dev/spidevbus.chip"), with the specified SPI mode, maxSpeed in hertz, bitOrder, bitsPerWord, and extraFlags.
- SPI.openAdvanced2(int bus, int chip, String path, SPImode mode, int maxSpeed, BitOrder bitOrder, int bitsPerWord, int extraFlags)
- Opens the SPI device at the specified path, with the specified SPI mode, maxSpeed in hertz, bitOrder, bitsPerWord, and extraFlags. This open function is the same as SPI.openAdvanced, except that extra_flags can be 32-bits.
Properties
- bitOrder → BitOrder
-
SPI bit order
final
- bitsPerWord → int
-
SPI transfer word size
final
- bus → int
-
SPI bus number: /dev/spidevbus.chip
final
- chip → int
-
SPI chip number: /dev/spidevbus.chip
final
- extraFlags → int
-
SPI extra flags
final
- hashCode → int
-
The hash code for this object.
read-onlyinherited
- maxSpeed → int
-
SPI bus speed
final
- mode → SPImode
-
SPI mode
final
- path → String
-
SPI device path: /dev/spidevbus.chip
final
- runtimeType → Type
-
A representation of the runtime type of the object.
read-onlyinherited
Methods
-
dispose(
) → void - Releases all interal native resoures.
-
getErrno(
) → int - Returns the libc errno of the last failure that occurred.
-
getHandle(
) → int - Returns the address of the internal handle.
-
getSPIbitOrder(
) → BitOrder - Returns the BitOrder.
-
getSPIbitsPerWord(
) → int - Returns bits per word.
-
getSPIextraFlags(
) → int - Returns the 8-bit extra flags mask.
-
getSPIextraFlags32(
) → int - Returns the 32-bit extra flags mask.
-
getSPIfd(
) → int - Returns the file descriptor (for the underlying spidev device) of the SPI handle.
-
getSPIinfo(
) → String - Returns a string representation of the spi handle.
-
getSPImaxSpeed(
) → int - Returns the max speed of the SPI bus.
-
getSPImode(
) → SPImode - Returns the SPImode.
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
setSPIbitOrder(
BitOrder bitOrder) → void -
Sets the
bitOrder. -
setSPIbitsPerWord(
int value) → void - Sets the bits per word.
-
setSPIextraFlags(
int value) → void - Sets the 8-bit extra flags mask.
-
setSPIextraFlags32(
int value) → void - Sets the 32-bit extra flags mask.
-
setSPImaxSpeed(
int maxSpeed) → void -
Sets the
maxSpeedof the SPI bus. -
setSPImode(
SPImode mode) → void - Sets the SPImode.
-
toJson(
) → String - Converts a SPI to a JSON string. See constructor isolate for detials.
-
toString(
) → String -
A string representation of this object.
inherited
-
transfer(
List< int> data, bool reuseBuffer) → List< int> -
Shifts out
data, while shifting in the data to the result buffer. IfreuseBufferis true,datawill be used for the result buffer, for false a new buffer will be created. -
transferInt8(
Pointer< Uint8> data, bool reuseBuffer, int len) → Pointer< Uint8> -
Shifts out
lenword counts of thedatabudder, while shifting in the result buffer. IfreuseBufferis true,datawill be used the result buffer, for false a new buffer will be created.
Operators
-
operator ==(
Object other) → bool -
The equality operator.
inherited
Static Methods
-
getSPIerrorCode(
int value) → SPIerrorCode -
Converts the native error code
valueto GPIOerrorCode.