Legacy Serial Read

Read input data for baseboard serial communications

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Libraries:
Simulink Real-Time / RS232 / Mainboard

Description

The Legacy Serial Read block reads input data for baseboard serial communications on the Speedgoat^® target computer.

For more information, see RS-232 Serial Communication and RS-232 Legacy Drivers.

Examples

ASCII Encoding/Decoding Loopback Test

Send ASCII data over a serial link.

• Open Script

ASCII Encoding/Decoding Resync Loopback Test

Use the ability of the FIFO Read HDRS block to resynchronize after being repeatedly disabled and apply this ability to resolve errors such as when a message is only partially complete at the time the read is attempted.

• Open Script

Binary Encoding/Decoding Loopback Test

Send Binary data over a serial link.

• Open Script

Binary Encoding/Decoding Resync Loopback Test

Use the ability of the FIFO Read BINARY block to handle messages that are interrupted and only partially complete.

• Open Script

Simple ASCII Encoding/Decoding Loopback Test (with Baseboard Blocks)

Convert a single floating point number to ASCII and transmit the value over a serial link.

• Open Script

ASCII Encoding/Decoding Loopback Test (with Baseboard Blocks)

Send ASCII data over a serial link.

• Open Script

ASCII Encoding/Decoding Resync Loopback Test (with Baseboard Blocks)

Use the ability of the FIFO Read HDRS block to resynchronize after being repeatedly disabled and apply this ability to resolve errors such as when a message is only partially complete at the time the read is attempted.

• Open Script

Binary Encoding/Decoding Loopback Test (with Baseboard Blocks)

Send Binary data over a serial link.

• Open Script

Binary Encoding/Decoding Resync Loopback Test (with Baseboard Blocks)

Use the ability of the FIFO Read BINARY block to handle messages that are interrupted and only partially complete.

• Open Script

Ports

Output

Output — Data from serial port read

serial data

The Output port provides the data from the serial port read.

Parameters

Serial port type — Port type that is being accessed

Legacy Serial Port (default) | USB Serial Port | Specify

Specify the serial port type for communications. Choose Legacy Serial Port or USB Serial Port to specify the type of port used. Or, choose Specify to manually specify the path of the port used. For more information about serial ports, see RS-232 Serial Communication.

Dependencies

Setting Serial port type to Legacy Serial Port or USB Serial Port displays the Serial port number parameter in which you can specify the port number.

Setting Serial port type to Specify displays the Serial port parameter in which you can specify the port path.

Programmatic Use

Block Parameter: portType

Serial port number — Port number that is being accessed

1 (default) | positive integer

Specify the serial port number for communications.

If using USB-to-serial adapters, the target computer detects these adapters as ttySUSB0, ttySUSB1, and so on in the order that the adapters are connected to the serial devices.

The order of port assignment is retained through the power cycle of the target computer or serial device if there is no change in the connections to the ports.

Dependencies

This parameter is visible if Serial port type is set to Legacy Serial Port or USB Serial Port.

Programmatic Use

Block Parameter: portNum

Serial port — Serial port device path that is being accessed

/dev/ttyS0 (default) | node path

Specify the serial port device path for communications. The path can be the device path of a Legacy Serial Port or USB Serial Port.

Dependencies

This parameter is visible if Serial port type is set to Specify.

Programmatic Use

Block Parameter: nodePath

Max Read Count — Select maximum word read count

51 (default) | int

Use this value to select the maximum word read count.

Programmatic Use

Block Parameter: count

Output Datatype — Select output data type

8 bit uint null terminated (default) | 8 bit int null terminated | count+16 bit uint | count+16 bit int | count+32 bit uint | count+32 bit int

Use this value to select the output data type.

Programmatic Use

Block Parameter: dtype

SampleTime — Select sample time in seconds

.01 (default) | double

Use this value to select the sample time in seconds.

Programmatic Use

Block Parameter: sampletime

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2020b

R2021b: USB to Serial for RS232 Blocks

The RS232 mainboard blocks support connecting USB serial adapter ports. The Serial port parameter of the Legacy Serial Read block, Legacy Serial Write block, Legacy Serial Setup block, Legacy Serial Port block, and Legacy Serial Port F block means that you can select a USB Serial Port or a Legacy Serial Port.