SPI WriteRead

Write data to and read data from an SPI device

• Library:

• Simulink Support Package for Arduino Hardware / Common

• 

Description

Write data to and read data from an SPI device connected to your Arduino board. Using this block, you can access an SPI device to measure quantities such as temperature, and pressure. You can also access an SPI device to support WiFi connectivity, and to access an SD card to store data.

Click View pin map to open the Arduino Pin Mapping table .

To know how to assign pins for the block, see Arduino Pin Mapping for Timer Independent Blocks.

Limitations

This limitation is not applicable when using Arduino^® MKR1000, Arduino MKR WIFI 1010, and Arduino MKR ZERO boards.

In a Simulink^®model, the SPI WriteRead block is supported only if:

• No blocks from the Ethernet shield library or the WiFi library are already present in the model.

• External mode is over serial.

Ports

Input

Port_1 — Input port to write data to SPI slave

[Nx1] or [1xN] array

The input port through which the block accepts a single dimensional array of values to write to the slave device.

Data Types: uint8 | uint16 | uint32

Output

Port_1 — Output port to read data from SPI slave device

[Nx1] array

Output port from which the block receives data from SPI slave device.

Data Types: uint8 | uint16 | uint32

Parameters

Slave select (SS) pin — Slave select pin to which SPI slave device is connected

(default) |

Enter the pin number on the Arduino board to which the SPI slave device is connected. The SPI master pulls the SS pin of the selected slave to a low (0) value to start the communication. See Pin Mapping on Arduino Blocks to know the SS pin restriction with different Arduino boards.