F2837xD/F2838x/F2838x-M4 IPC Transmit

Transmit data to either core while using separate model for each core

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Libraries:
C2000 Microcontroller Blockset / F2837xD
C2000 Microcontroller Blockset / F2838x / C28x
C2000 Microcontroller Blockset / F2838x / M4
C2000 Microcontroller Blockset / F28p65x

Description

The IPC Transmit block transmits data from one Core to the other.

Note

Use IPC Receive and IPC Transmit blocks to receive or sent data to either core for multi-core processors. Use these blocks for flat model approach where you are using separate models for each core.

If you are using multiprocessor modeling approach with single model triggering multiple cores using Task Manager, use the Interprocess Data Read and Interprocess Data Write blocks to send and receive data between cores.

Core1 transmits data to its allocated memory (Core1-to-Core2 Message RAM) and receives data from the allocated memory of Core2 (Core2-to-Core1 Message RAM). Similarly Core2 transmits data to its allocated memory (Core2-to-Core1 Message RAM) and receives data from allocated memory of Core1 (Core1-to-Core2 Message RAM). For F2838xD, Core1/Core2 can be CPU1,CPU2 or ARM Cortex-M4 (CM) and for F2837xD, Core1/Core2 can be CPU1 or CPU2.

If Core1 and Core2 are both C28x core, then the data and channel structure between two cores are allocated in Message RAM and the data array is allocated in Global Shared RAM. In C28x core, by default all the channel structures are created in Message RAM.

However, if one of the core is ARM Cortex M4 (applicable only for F2838x), then the data array is allocated only using Message RAM as global shared RAM is not available between cores. In order to accommodate more data, only required channel structures are created in Message RAM. Hence if the channel number used for transmit block in one core does not match with the receive block in other core the data transmission will not occur.

For more information on how the memory is allocated for IPC block, see Memory Allocation for IPC Flat Models

Examples

Inter-Processor Communication Using IPC Blocks

Use the IPC blocks to communicate between multiple cores of multi-core of Texas Instruments™ C2000™ Microcontroller Blockset using Simulink® models.

• Open Model

Ports

Input

Input — Data to be send to the other Core

uint16 | single | int8 | uint8 | int16 | int32 | uint32 | boolean

The port accepts data to be transmitted to the other Core as a vector or scalar.

Parameters

Destination — Destination selected to send data

C28x (CPU1/CPU2)/CPU1 (default) | ARM Cortex-M4 (CM)/CPU2

The destination to which you want to send data. The destination selection is based on the processor you choose. For F2838x(C28x) processor, the destination is either C28x (CPU1/CPU2) or ARM Cortex-M4 (CM). For F2838x-M4 ARM core processor, the destination is CPU1 or CPU2.

The IPC Transmit block mask displays the current destination and the channel selected. For example, if the block displays C28x_Ch0, then the destination is C28x (CPU1/CPU2) and channel is 0. Similarly if the IPC Transmit block displays CM_Ch1, then the destination is ARM Cortex-M4 (CM) and channel is 1.

Note

This parameter is only available for F2838x(C28x) and F2838x-M4 ARM core processors.

Channel — Channel selected to transmit data

0 (default) | 0–31

The channel from which you want to transmit data. Each channel is a separate memory location in the shared memory.

Note

The transmitter and receiver have 32 channels each to transmit and receive data. For data transmission and reception, the transmitter and receiver must be set to the same channel number.

Enable blocking — Specify if Core must wait until sent data is read

off (default) | on

When enabled, after sending data, the Core waits until the other Core reads the data.

Version History

Introduced in R2018a