RS-232

Serial communication with RS-232 protocols

RS-232 is a mature point-to-point protocol for serial communication. Use the RS-232 blocks to communicate with other devices by using the serial ports built into the target computer. For detailed information about the target computer serial ports, see the manufacturer documentation.

See RS-232 Serial Communication.

Blocks

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RS232

ASCII Encode	Convert Simulink values into `uint8` character vector (Since R2020b)
ASCII Decode	Parse ASCII character vector into Simulink values (Since R2020b)
ASCII Decode V2	Parse ASCII character vector into Simulink values (Since R2020b)
FIFO Read	Read simple data streams (Since R2020b)
FIFO Write	Write simple data streams (Since R2020b)
FIFO Read HDRS	Read multiple ASCII data streams according to header information (Since R2020b)
FIFO Read Binary	Read multiple binary data streams according to header information (Since R2020b)
Modem Control	Control state of RTS and DTR output lines on serial port (Since R2020b)
Modem Status	Return state of modem control lines (Since R2020b)
Legacy Serial Read	Read input data for baseboard serial communications (Since R2020b)
Legacy Serial Setup	Set up baseboard serial communications (Since R2020b)
Legacy Serial Write	Write output data for baseboard serial communications (Since R2020b)
Legacy Serial Port	Send and receive data over mainboard baseboard serial port
Legacy Serial Port F	Send and receive data over mainboard baseboard serial port with FIFO

Utilities

Byte Packing	Construct data frames
Byte Unpacking	Deconstruct data frames
Byte Reversal/Change Endianess	Reverse little-endian data for big-endian processor
Protocol Decoder	Decode a uint8 byte stream by specifying the packet structure (Since R2023b)
Protocol Encoder	Encode input data into a uint8 byte stream by specifying the packet structure (Since R2023b)
Shared Memory Pack	Shared memory pack
Shared Memory Unpack	Shared memory unpacking

Topics

RS-232 Serial Communication
Learn about the Simulink^® Real-Time™ library for serial communication between target computers and serial devices.
RS-232 Legacy Drivers
To represent multiple serial devices, use composite Simulink Real-Time RS-232 mainboard driver blocks.

Featured 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.