SPI Register Write

R2026b

Write to register of SPI device connected to NVIDIA Jetson board

Since R2026a

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SPI Register Write block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
NVIDIA Jetson and NVIDIA DRIVE / Communication

Description

Add-On Required: This feature requires the MATLAB Coder Support Package for NVIDIA Jetson and NVIDIA DRIVE Platforms add-on.

The SPI Register Write block writes data to a Serial Peripheral Interface (SPI) peripheral device connected to an NVIDIA^® Jetson™ board.

Ports

Input

Port_1 — Data to write

scalar | vector

Data to write, specified as a scalar or vector.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64

Parameters

To edit block parameters interactively, use the Property Inspector. From the Simulink^® Toolstrip, on the Simulation tab, in the Prepare gallery, select Property Inspector.

Board — Hardware board to deploy to

NVIDIA Jetson TX2 Developer Kit (default) | NVIDIA Jetson AGX Xavier Developer Kit | NVIDIA Jetson AGX Orin Developer Kit | NVIDIA Jetson Xavier NX Developer Kit | NVIDIA Jetson Orin Nano Developer Kit | NVIDIA Jetson Nano Developer Kit

Hardware board to deploy the model to.

Programmatic Use

To set the block parameter value programmatically, use the set_param (Simulink) function.

To get the block parameter value programmatically, use the get_param (Simulink) function.

Parameter:	Board
Values:	"NVIDIA Jetson TX2 Developer Kit" | "NVIDIA Jetson AGX Xavier Developer Kit" | "NVIDIA Jetson AGX Orin Developer Kit" | "NVIDIA Jetson Xavier NX Developer Kit" | "NVIDIA Jetson Orin Nano Developer Kit" | "NVIDIA Jetson Nano Developer Kit"

Example: set_param(gcb,"Board","NVIDIA Jetson Orin Nano Developer Kit")

Chip Select pin — Pin connected to SPI peripheral device

SPI0_CS0 | SPI0_CS1 | SPI1_CS0 | SPI1_CS1 | SPI2_CS0 | SPI2_CS1 | SPI3_CS0 | SPI3_CS1

Pin connected to the SPI peripheral device. The Board parameter setting determines the available settings, default value, and programmatic parameter name. This table shows the available settings for each board.

Board Parameter Setting	Available Chip Select Pin Settings	Default Value	Programmatic Parameter Name
NVIDIA Jetson AGX Xavier Developer Kit	SPI0_CS0 SPI0_CS1	SPI0_CS0	SSPin1SPI
NVIDIA Jetson TX2 Developer Kit	SPI3_CS0 SPI3_CS1	SPI3_CS0	SSPin1SPIMiscSpidev3
NVIDIA Jetson Orin Nano Developer Kit	SPI0_CS0 SPI0_CS1 SPI1_CS0 SPI1_CS1	SPI1_CS0	SSPin2SPI
NVIDIA Jetson Nano Developer Kit	SPI0_CS0 SPI0_CS1 SPI1_CS0 SPI1_CS1	SPI1_CS0	SSPin2SPI
NVIDIA Jetson AGX Orin Developer Kit	SPI0_CS0 SPI0_CS1 SPI2_CS0 SPI2_CS1	SPI0_CS0	SSPin2SPIMiscSpidev0And2
NVIDIA Jetson Xavier NX Developer Kit	SPI0_CS0 SPI0_CS1 SPI2_CS0 SPI2_CS1	SPI0_CS0	SSPin2SPIMiscSpidev0And2

Programmatic Use

To set the block parameter value programmatically, use the set_param (Simulink) function.

To get the block parameter value programmatically, use the get_param (Simulink) function.

Parameter:	SSPin1SPI
Values:	"SPI0_CS0" (default) | "SPI0_CS1"

Example: get_param(gcb,"SSPin1SPI")

Parameter:	SSPin1SPIMiscSpidev3
Values:	"SPI3_CS0" (default) | "SPI3_CS1"

Parameter:	SSPin2SPI
Values:	"SPI1_CS0" (default) | "SPI0_CS0" | "SPI0_CS1" | "SPI1_CS1"

Parameter:	SSPin2SPIMiscSpidev0And2
Values:	"SPI0_CS0" (default) | "SPI0_CS1" | "SPI2_CS0" | "SPI2_CS1"

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

0 (default) | 1 | 2 | 3

Mode to use for SPI communication. This table shows the clock polarity and clock phase for each setting.

Mode	Clock Polarity	Clock Phase
0	0	0
1	0	1
2	1	0
3	1	1

Programmatic Use

To set the block parameter value programmatically, use the set_param (Simulink) function.

To get the block parameter value programmatically, use the get_param (Simulink) function.

Parameter:	ClockMode
Values:	"0" (default) | "1" | "2" | "3"

Example: set_param(gcb,"ClockMode","2")

Register address — SPI peripheral address to write to

0 (default) | scalar | vector

SPI peripheral address to write to. Each value of the register address must be a nonnegative integer less than or equal to 255.

Programmatic Use

To set the block parameter value programmatically, use the set_param (Simulink) function.

To get the block parameter value programmatically, use the get_param (Simulink) function.

Parameter:	RegisterAddress
Values:	"0" (default) | integer between 0 and 255 in quotes

Example: set_param(gcb,"RegisterAddress","[1 2]")

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

GPU Code Generation
Generate CUDA® code for NVIDIA® GPUs using GPU Coder™.

Version History

Introduced in R2026a