C28x SCI Transmit

Transmit data from target via serial communication interface (SCI) to host

• Library:

• Embedded Coder Support Package for Texas Instruments C2000 Processors / C2802x

  Embedded Coder Support Package for Texas Instruments C2000 Processors / C2803x

  Embedded Coder Support Package for Texas Instruments C2000 Processors / C2805x

  Embedded Coder Support Package for Texas Instruments C2000 Processors / C2806x

  Embedded Coder Support Package for Texas Instruments C2000 Processors / C280x

  Embedded Coder Support Package for Texas Instruments C2000 Processors / C281x

  Embedded Coder Support Package for Texas Instruments C2000 Processors / C2833x

  Embedded Coder Support Package for Texas Instruments C2000 Processors / C2834x

  Embedded Coder Support Package for Texas Instruments C2000 Processors / F2807x

  Embedded Coder Support Package for Texas Instruments C2000 Processors / F2837xD

  Embedded Coder Support Package for Texas Instruments C2000 Processors / F2837xS

  Embedded Coder Support Package for Texas Instruments C2000 Processors / F2838x/ C28x

  Embedded Coder Support Package for Texas Instruments C2000 Processors / F28004x

  Embedded Coder Support Package for Texas Instruments C2000 Processors / F28002x

  Embedded Coder Support Package for Texas Instruments C2000 F28M3x Concerto Processors / F28M35x / C28x

  Embedded Coder Support Package for Texas Instruments C2000 F28M3x Concerto Processors / F28M36x / C28x

• 

Description

The SCI Transmit block transmits scalar or vector data using the specified SCI hardware module. The sampling rate and data type are inherited from the input port.

A model can only contain one SCI Receive block for each module. The C28x processor has three SCI modules — A, B, and C. You can configure the SCI modules by navigating to Hardware Implementation > Target hardware resources. Verify that these settings meet the requirements of your application.

Note

Fixed-point inputs are not supported by this block, but you can use a Data Type Conversion (Simulink) block to convert the fixed-point format to native data type. In the Data Type Conversion block, set the Input and output to have equal parameter to Stored Integer (SI).

Ports

Input

Data — Data written to serial bus

scalar | vector

Input data written to the serial communication bus.

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

Parameters

SCI module — SCI module for communication

A (default) | B | C | D

The SCI module used for communication.

Additional package header — Indicates start of data

'S' (default) | string | char | number from 0 to 255

The data located at the beginning of the sent data package, which is not part of the data being transmitted, and indicates the start of data. The additional package header must be represented using ASCII characters. Use a string or a number (0–255). You must add single quotes around strings entered for this parameter, but the quotes are not sent or included in the total byte count. To specify a null value (no package header), enter two single quotes only.

Note

Match additional package headers or terminators with those specified in the host SCI Receive block.

Additional package terminator — Indicates end of data

'E' (default) | string | char | number from 0 to 255

The data located at the end of the sent data package, which is not part of the data being transmitted, and indicates the end of data. The additional package terminator must be represented using ASCII characters. Use a string or a number (0–255). You must put single quotes around strings entered in this field, but the quotes are not sent or included in the total byte count. To specify a null value (no package terminator), enter two single quotes only.

Enable transmit FIFO interrupt — Posts interrupt when FIFO is full

off (default) | on

If this option is selected, an interrupt is posted when the FIFO is full, allowing the subsystem to perform any action. For example, you can use the C28x Hardware Interrupt block for triggering the SCI Transmit block to write data as soon as the FIFO is available for transmitting data.

If the option is not selected, the SCI Transmit block is in polling mode and checks if the FIFO is available. If the FIFO is not full, the block writes data into the FIFO. If the FIFO is full, in blocking mode, the block waits until the FIFO is available. In non-blocking mode, the block continues with the execution of the algorithm without waiting for the availabitiy of the FIFO.

Transmit FIFO interrupt level (maximum 4 for Piccolo devices) — Level for triggering interrupt

1 (default) | integer in the range [1 16]

The Transmit FIFO generates an interrupt when the number of data bytes in the receive FIFO is less than or equal to the value selected for this parameter.

Dependencies

This parameter appears only when the Enable transmit FIFO interrupt option is selected.

Model Examples

Field-Oriented Control of PMSM with Quadrature Encoder Using C2000 Processors

Implements the field-oriented control (FOC) technique to control the speed of a three-phase permanent magnet synchronous motor (PMSM). The FOC algorithm requires rotor position feedback, which is obtained by a quadrature encoder sensor. For details about FOC, see Field-Oriented Control (FOC) (Motor Control Blockset).