Arduino SPI Functions (Arduino Toolkit - a somewhat Matlab compatible arduino toolkit for GNU octave.)

9.7 Arduino SPI Functions

@device/delete
@device/display
@device/subsref
@device/writeRead
@spidev/delete
@spidev/display
@spidev/spidev
@spidev/subsref
@spidev/writeRead

9.7.1 @device/delete

: delete (dev) ¶

Free resources of a device object.

Inputs

dev - object to free

See also: device.

9.7.2 @device/display

: display (dev) ¶

Display device object.

Inputs

dev - device object to display

See also: device.

9.7.3 @device/subsref

: val = subsref (dev, sub) ¶

subref for device

See also: device.

9.7.4 @device/writeRead

: dataOut = readWrite (spi, dataIn) ¶

Write uint8 data to spi device and return back clocked out response data of same size.

Inputs

spi - connected spi device on arduino

dataIn - uint8 sized data to send to spi device framed between SS frame.

Outputs

dataOut - uint8 data clocked out during send to dataIn.

See also: arduino, device.

9.7.5 @spidev/delete

: delete (dev) ¶

Free resources of a spidev object.

Inputs

dev - spidev object to free

See also: spidev.

9.7.6 @spidev/display

: display (dev) ¶

Display spidev object.

Inputs

dev - spidev object to display

See also: spidev.

9.7.7 @spidev/spidev

: dev = spidev (ar, cspin) ¶

: dev = spidev (ar, cspin, propname, propvalue) ¶

spidev is depreciated and will be removed in a future version. Use device instead.

Create an spidev object to communicate to the SPI port on a connected arduino.

Inputs

ar - connected arduino object

cspin - chip select pin for attached spi device.

propname, propvalue - property name/value pair for values to pass to devices.

Currently known properties:

bitrate: bit rate speed in Mbs
bitorder: ’msbfirst’ or ’lsbfirst’
mode: SPI mode 0 - 3.

Outputs

dev - created spidev object

Properties

The spidev object has the following public properties:

parent: The parent (arduino) for this device
pins: pins used by this object
mode: mode used for created object
bitrate: Bitrate set for object
bitorder: Bitorder set for object
chipselectpin: Pin used for chipselect

See also: arduino, readWrite.

9.7.8 @spidev/subsref

: val = subsref (dev, sub) ¶

subref for spidev

See also: spidev.

9.7.9 @spidev/writeRead

: dataOut = readWrite (spi, dataIn) ¶

Write uint8 data to spi device and return back clocked out response data of same size.

Inputs

spi - connected spi device on arduino

dataIn - uint8 sized data to send to spi device framed between SS frame.

Outputs

dataOut - uint8 data clocked out during send to dataIn.

See also: arduino, spidev.