SPI Register Read

Read data from SPI peripheral device register

Add-On Required: This feature requires the Simulink Support Package for Raspberry Pi Hardware add-on.

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Libraries:
Simulink Support Package for Raspberry Pi Hardware / Communication

Description

The SPI Register Read block initiates an SPI read operation from an SPI peripheral register. You can specify the data type and data length to get data from the peripheral registers. To open the pin map of the Raspberry Pi board, click the View pin map button.

For more information on SPI communication, refer to Support SPI Communication and Raspberry Pi SPI Interface

Ports

Output

Port_1 — Output port to read data

[Nx1] array

This port is the output port to read data from an SPI peripheral register.

Data Types: single | double | int8 | int16 | int32 | uint8 | uint16 | uint32

Parameters

Board — Specific board used for SPI communication

Pi 2 Model B (default) | Model B Rev1 | Model B Rev2 | Model B+ | Pi 3 Model B | Pi 3 Model B+ | Pi Zero W | Pi 4 Model B | Pi Zero 2 W | Compute Module 4 | Pi 5 Model

Select the specific board that you are using. Changing the board updates the pin choices that you get.

Chip select pin — Pin connected to the SPI peripheral device

SPI0_CE0 (default) | SPI0_CE1 | SPI1_CE0 | SPI1_CE1 | SPI1_CE2

Select the pin number on the Raspberry Pi board to which the SPI peripheral device is connected.

To enable the secondary SPI bus on your Raspberry Pi^® hardware, follow the steps as mentioned in Enable Secondary SPI Bus of Raspberry Pi Hardware.

Mode (Clock polarity and phase) — Mode of SPI communication

0 (default) | 1 | 2 | 3

Select the mode of SPI communication.

Register address — Register address to read the data

0 (default) | uint8 array

Enter the SPI peripheral register address to read the data.

Output data type — Data type for output

int8 (default) | uint8 | int16 | uint16 | int32 | uint32 | single | double

Select the data type for SPI communication.

Output data length — Data length for SPI communication

1 (default) | scalar

Enter the output data length of the selected data type to read from the SPI peripheral register.

Sample time — Interval at which block reads data from SPI peripheral device

0.1 (default) | -1 | any nonnegative value

Specify how often this block reads the data from the SPI peripheral device, in seconds. When you set this parameter to -1, Simulink^® determines the best sample time for the block based on the block context within the model.

Version History

Introduced in R2017a