MCAN Transmit

Write data to CAN bus

Since R2024b

• 

Libraries:
Embedded Coder Support Package for Infineon AURIX TC4x Microcontrollers / AURIX TC4x

Description

The MCAN Receive block is a Modular CAN (MCAN) that writes data to the controller area network (CAN) bus.

The block accepts a 1-D array of type uint8 when you set the data format to Raw data. If you set the data format to CAN Message, the block accepts a Simulink^® bus signal from the CAN Pack or CAN FD Pack blocks, depending on the frame format.

Examples

Polling-Based CAN Communication Using MCAN Blocks of Infineon AURIX TC4x

Use the MCAN Transmit and MCAN Receive blocks from Embedded Coder® Support Package for Infineon® AURIX™ TC4x Microcontrollers to handle polling-based communication between different CAN modules of Infineon® AURIX™ TC4x Microcontrollers.

• Open Script

Interrupt-Based CAN Communication Using MCAN Blocks of Infineon AURIX TC4x

Use the MCAN Transmit and Receive blocks from Embedded Coder® Support Package for Infineon® AURIX™ TC4x Microcontrollers to handle interrupt-based communication between different CAN modules of Infineon® AURIX™ TC4x Microcontrollers.

• Open Script

Ports

Input

Data — Input data port

vector | scalar

Specify the messages in the raw data format at this port.

Dependencies

To enable this port, set the Data format parameter to Raw data and disable the Remote transmit parameter.

Data Types: uint8

Remote Request — Remote transmission request

scalar

Specify the remote transmission request at this port as:

• 1 — To activate the remote transmission request

• 0 — To deactivate the remote transmission request

Dependencies

To enable this port, set the Data format parameter to Raw data, the Frame format parameter to Classic CAN, and enable the Remote transmit parameter.

Data Types: Boolean

ID — CAN message identifier

scalar

Specify the CAN message identifier at this port as one of these values:

• 0-0x7ff — For a standard (11-bit) identifier

• 0-0x1fffffff — For an extended (29-bit) identifier

Dependencies

To enable this parameter, set the Data format parameter to Raw data and select the Enable input port for identifier parameter.

Data Types: uint32

ID Type — CAN message identifier type

scalar

Specify the CAN message identifier type at this port as one of these values:

• 0 — If the identifier is an 11-bit standard identifier

• 1 or any value other than 0 — If the identifier is an 29-bit standard identifier

Dependencies

To enable this parameter, set the Data format parameter to Raw data and select the Enable input port for identifier type parameter.

Data Types: uint8

Length — CAN message length

scalar

Specify the length of the transmitted CAN message in bytes at this port.

Note

The Length value determines the size of the data to be transmitted over the CAN bus. If the value at the Length port is greater than the size of the value at the Data port, then Simulink prioritizes the Data value over the Length value.

Dependencies

To enable this parameter, set the Data format parameter to Raw data and select the Enable input port for data length parameter.

Data Types: uint8

Msg — Input CAN message

vector | scalar

Specify the messages in the CAN message format.

You can create your messages or you can upload a CAN database file from the CAN Pack or CAN FD Pack blocks depending on the value in the Frame format parameter.

Note

To create a CAN message using the CAN Pack block, enable the Output as bus parameter in the CAN Pack block.

Dependencies

To enable this port, set the Data format parameter to CAN message.

Data Types: CAN message

Buffer Number — Number of buffers in buffer transmit mode

scalar

Specify the number of buffers for CAN transmission.

Dependencies

To enable this port, set the Data format parameter to CAN message, Mode parameter to Buffer, and select the Enable input port for buffer number parameter.

Data Types: uint8

Output

Status — Status of data transmission

scalar

Specify the data transmission status at this port as one of these values:

• 0 — No error in CAN data transmission

• 1 — Error in CAN data transmission due to timeout

• 2 — Error in CAN data transmission due to invalid buffer configuration

Dependencies

To enable this port, select the Enable status port parameter.

Data Types: uint8

FIFO Level — FIFO register filling level

scalar

Output port to display the level of the FIFO register.

Dependencies

To enable this parameter, set the Mode parameter to FIFO or Queue and select the Output FIFO transmit free level parameter.

Parameters

Data format — Data output type

Raw data (default) | CAN message

Set the data type of the transmitted message as one of these values:

• Raw data — Transmit the message as a 1-by-N uint8 array.

• CAN message — Transmit message in CAN message format. Depending on the value of the Frame format parameter, use CAN Pack or CAN FD Pack blocks along with the MCAN Transmit block to pack the CAN message.

Note

To create a CAN message using the CAN Pack block, enable the Output as bus parameter in the CAN Pack block.

Frame format — Frame format type

CAN-FD (default) | Classic CAN

Select the frame format of the transmitted message.

Remote transmit — Option to enable remote message transmission

off (default) | on

Select this parameter to transmit a remote frame in the CAN message.

Dependencies

To enable this parameter, set the Data format parameter to Raw data and set the Frame format parameter to Classic CAN.

CAN FD

Enable bit rate switching — Option to enable switching between nominal bit rate and data bit rate

off (default) | on

Select this parameter to enable switching between the nominal bit rate and the data bit rate.

Dependencies

To enable this parameter, set the Data Format parameter to Raw data and Frame format to CAN-FD.

Identifier type

Enable input port for identifier type — Option to enable input port for identifier type

off (default) | on

Select this parameter to enable the input port to specify the identifier type.

Dependencies

To enable this parameter, set the Data format parameter to Raw data.

Identifier type — Message identifier type

Standard (11-bit identifier) (default) | Extended (29-bit identifier)

Specify the type of message identifier.

Dependencies

To enable this parameter, set the Data Format parameter to Raw data and disable the Enable input port for identifier type parameter.

Identifier

Enable input port for identifier — Option to enable input port for identifier

on (default) | off

Select to enable input port for identifier.

Dependencies

To enable this parameter, set Data format parameter to Raw data.

Identifier — Message identifier

100 (default) | scalar in the range (0,0x7ff) for standard frame | scalar in the range (0,0x1fffffff) for extended frame

Specify an 11-bit identifier for the standard frame size or a 29-bit identifier for the extended frame size. You can specify the identifier as a decimal, binary, or hexadecimal value. For binary and hexadecimal formats, use bin2dec and hex2dec respectively to convert the value. The block codes the identifier into a message and sends it to the CAN bus.

Dependencies

To enable this parameter, set Data format parameter to Raw data and disable the Enable input port for identifier type parameter.

Data length

Enable input port for data length — Option to enable input port for data length

on (default) | off

Select this parameter to enable the input port to specify data length.

Dependencies

To enable this parameter, set the Data format as Raw data.

Data length — Length in bytes

8 (default) | scalar in the range (0,8) | 12 | 16 | 20 | 24 | 32 | 48 | 64

Specify the data length in bytes.

Dependencies

To enable this parameter, set the Data format as Raw data and disable the Enable input port for data length parameter.

Node

Number of nodes — Number of CAN nodes

1 (default) | scalar in the range (0 to 20)

Specify the number of CAN nodes for data transmission.

Note

The choice of the Number of nodes parameter determines how many nodes you must configure in the Hardware Mapping tool (see MCAN Transmit Peripheral Configuration).

Mode — Message transmission mode

FIFO or Queue (default) | Buffer

Select the mode of the CAN data transmission.

Buffer

Enable input port for buffer number — Option to enable input port for buffer number

off (default) | on

Select this parameter to enable the Buffer Number input port in the block.

Dependencies

To enable this parameter, set the Mode parameter to Buffer.

Buffer number (0 - 31) — Number of buffers for data transmission

0 (default) | scalar in the range (0,31)

Specify the number of buffers to use for transmitting the CAN data.

Dependencies

To enable this parameter, set the Mode parameter to Buffer and disable the Enable input port for buffer number parameter.

Timeout

Timeout(s) in seconds — Waiting time to complete write operation

0 (default) | scalar in the range (0,2147480)

Specify the maximum waiting time (in seconds) to transmit the CAN data.

Output FIFO transmit free level — Option to enable output FIFO transmit free level

off (default) | on

Select this parameter to enable the FIFO level port, which outputs the transmitted FIFO message level.

Dependencies

To enable this parameter, set the Mode parameter to FIFO or Queue.

Enable status port — Option to enable output status port

off (default) | on

Select this parameter to enable the Status port, which outputs the data transmission status.

Version History

Introduced in R2024b