SPI Sniffer v1 / SPI / Configuration Files (code modules) / Configurable I/O / Speedgoat I/O Blockset

v10.0.1.x for R2026a

SPI - Sniffer v1

SPI - Sniffer v1 — The SPI Sniffer driver block is used to monitor an existing SPI communication setup.

Simulink Real-Time - Speedgoat

The SPI Sniffer driver block is used to monitor an existing SPI communication setup.

Outputs

MOSI n (n is the channel number): The data of the SPI MOSI data line. The width of the output port vector is defined by the Number of Words per Frame parameter in the SPI Configuration tab.
MISO n (n is the channel number): The data of the SPI MISO data line. The width of the output port vector is defined by the Number of Words per Frame parameter in the SPI Configuration tab.
Active CS n (n is the channel number): Indicates which chip select line was active for the last data transmission. If a value of 0 is read, this means that more than one CS was active at the same time and that the data may be corrupted. This port is optional and can be enabled by ticking the Show Active CS Outputs checkbox in the Output Port Configuration tab.

Tab: Module setup

Configurable I/O Module ID: This parameter associates a code module block with a configurable I/O module setup block. Set this value to match the Module ID defined in the setup block of the required configurable I/O module.
Channel: The number of the channel which this driver block entity will access. Only one channel per driver block can be addressed. You can specify channels in the range 1-N (N = the number of channels implemented in your specific configuration file defined in the Setup block).
Sample Time: Defines the base sample time at which this driver block gets its sample hit. This parameter can also be set to -1 for inherited sample time. The units are in seconds.

Tab: SPI Configuration

CPOL Vector

The clock polarity parameter:

CPHA Vector

The clock phase parameter

0: sample on the leading (first) clock edge
1: sample on the trailing (second) clock edge regardless of whether the clock is rising or falling.

Number of Bits per Word (Vector)

Defines the size of the words. Valid range is 1 to 32 (see note).

Number of Words per Frame (Vector)

Defines the number of words which are sent in a frame. Valid range is 1 to 32 (see note).

	Note
	The maximum number of bits per SPI transmition is limited to 256 bits. Therefore, the product of wordSize x frameSize may not be greater than 256.

	Note
	The SPI Sniffer doesn't support variable frame sizes. If a received frame is smaller than the configured Number of Words per Frame, the remaining elements will contain old values from previous transmitions.

Tab: Input and Output Configuration

Show Active CS Output: When this box is checked, the chip select line of the last SPI transaction will be available in Simulink via a dedicated output port. If a value of 0 is read at the output port, this means that more than one CS was active at the same time and that the data may be corrupted.