SENT

Read high-resolution sensor data over Single Edge Nibble Transmission (SENT) protocol

Since R2023b

• 

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

Description

The SENT block reads high-resolution data from sensor and provides 32-bit data output based on SENT (Single Edge Nibble Transmission) protocol (SAE J2716). The output based on SENT protocol is a unidirectional signal from sensor to controller, encoding sensor data information in the form of nibbles (4-bit data), packing 8 nibbles together.

The block also provides the options to enable additional outputs about the Status and Communication nibble, serial data, and the status of data reception.

Ports

Input

DataSel — Data selection based on features or sensors configured

scalar

This input port requests data based on sensor or feature selection configuration in SENT Configuration.

Note

• You can provide the input as 1, 2 or 3 if you select SPC Mode parameter as Feature selection.

• You can provide the input as 1, 2, 3 or 4 (based on the number of sensors interfaced on SENT channel) if you select SPC Mode parameter as Sensor selection.

Dependencies

To enable this port, set the SENT Protocol as SPC Mode and select the SPC Modeparameter as Feature selection or Sensor selection.

Data Types: uint8

Output

Data — 32-bit data

scalar | vector

The block outputs 32-bit value that represents the sensor data, packing 8 nibbles (4-bit data) together.

Data Types: uint32

Serial-data — 16-bit serial data

scalar | vector

The block outputs the 16-bit serial data that represents the sensor data.

Dependencies

To enable this port, select the Serial parameter.

Data Types: uint16

Status & Comm — Status and Communication nibble data (one nibble)

scalar

The block outputs the Status and Communication nibble data sent by the sensor (1^st nibble information), which generally provides diagnostic information like fault data, part numbers, and so on.

Dependencies

To enable this port, select the Status and Communication Nibble parameter.

Data Types: uint8

Channel status — Status of read operation over SENT protocol

scalar

The block outputs the status of the data that was read, or the errors that occurred during the data transfer, as a unit32 scalar value.

Bit	Status	Description
Bit 0	Receive success	This bit is set at the successfully received end of a frame. If CRC check is enabled, it also indicates successful CRC check.
Bit 1	Receive data success	This bit is set when received frame is moved to data register. Both RSI and RDI.
Bit 2	Receive buffer overflow	This bit is set when new data is received while older one is still not read from data register. Older data gets overwritten by new data.
Bit 3	Transfer data	This bit is set after the trigger condition was detected. Data to be transferred has been moved internally and new value can be written in SPC control register.
Bit 4	Transmit buffer underflow	This bit is set after data has been successfully transferred and no new data was written to SPC control register.
Bit 5	Frequency range error	This bit is set after a Synchronization / Calibration pulse was received that deviates more than +/- 25% from the nominal value.
Bit 6	Frequency drift error	This bit is set after a subsequent Synchronization / Calibration pulse was received that deviates more than 1.5625% from its predecessor.
Bit 7	Wrong number of nibbles received	This bit is set if less/more nibbles have been received than expected.
Bit 8	Nibbles value out of range	This bit is set if value off Nibble is not in range. It is less than 0 or greater than 15.
Bit 9	CRC error	This bit is set when CRC fails.
Bit 10	Wrong SC Nibble	This bit is set if Status and Communication nibble shows a start bit in a frame other than frame number nx16.
Bit 11	Serial data received	This bit is set after all serial data bits are received using the Status and Communication nibble.
Bit 12	Serial data CRC error	This bit is set if the CRC of the serial message fails.
Bit 13	Watch dog error	This bit is set if watchdog timer of the channel has expired.

Dependencies

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

Data Types: uint32

Parameters

Basic

Data format selection — Select data format

None (default) | Serial | Status and communication Nibble

Select the data format.

• Serial - In this data format, the block outputs serial data based on the SENT protocol.

  When you select this option, the block configures the Serial-data output port.

• Status and Communication Nibble - In this data format, the block provides the Status and Communication nibble data based on the SENT protocol.

  When you select this option, the block configures the Status & Comm output port.

Enable channel status port — Enable output data that specifies data read status and error

off (default) | on

Enable output data that specifies data read status and errors (if any) based on bit-wise categorization.

Sample time — Frequency at which block reads the received data

-1 (default) | scalar | vector

Specify in seconds how often the block should read the received data.

When you specify this parameter as -1, Simulink^® determines the best sample time for the block based on the block context within the model.

Advanced

SENT Protocol — Select the SENT protocol

Standard (default) | SPC

Select SENT protocol as standard or short PWM code (SPC) transmission for the channel.

Selection of this parameter as SPC enables options in Advanced tab in the SENT Configuration.

SPC Mode — Mode of SPC transmission

Synchronization (default) | Feature selection | Sensor selection

Select mode of SPC transmission.

Selection of this parameter enables the related parameters in the SENT Configuration.

Dependencies

To view this parameter, set the SENT Protocol parameter as SPC.

Version History

Introduced in R2023b