Composite blocks for RS-232/422/485 serial protocols

The Simulink® Real-Time™ software supports RS-232 I/O communication with serial ports on the target computer, using:

The internal blocks and subsystems of the RS-232/422/485 boards are controlled from the mask parameters dialog box for the send/receive subsystem in which they are used. For serial communications, use the composite serial communications drivers described in RS-232/422/485 Drivers (Composite). Access the internal blocks only to modify the subsystems for your use. The internal blocks are composite blocks for:

  • Quatech ESC-100, QSC-100, QSC-200/300, DSCP-200/300 series

  • Mainboard Baseboard series

  • Diamond System Emerald-M and Emerald-MM8 series

  • Fastcom® 422/2-PCI, Fastcom 422/2-PCI-335, Fastcom 422/4-PCI-335 series

For more information, see RS-232 I/O Drivers.


ASCII Decode V2 ASCII Decode V2
ASCII Encode/Decode (Composite) ASCII Encode/Decode
FIFO Read Binary (Composite) FIFO Read Binary
FIFO Read HDRS (Composite) FIFO Read HDRS block
FIFO Read/Write (Composite) FIFO Read/Write
RS-232/RS-422/RS-485 Send/Receive (Composite) RS-232/RS-422/RS-485 Send/Receive block
Modem Control (Composite) Modem Control block
Modem Status (Composite) Modem Status block
RS232 State (Composite) RS232 State block
RS-232/422/485 Board Setup (Commtech) and Interrupt Check (Quatech) (Composite) RS-232/422/485 Board Setup (Commtech) and Interrupt Check (Quatech) block
RS-232/422/485 Enable TX Interrupt (Composite) RS-232/422/485 Enable TX Interrupt block
RS-232/422/485 Filter Interrupt Reason (Composite) RS-232/422/485 Filter Interrupt Reason block
RS-232/422/485 Read Hardware FIFO (Composite) RS-232/422/485 Read Hardware FIFO block
RS-232/422/485 Read Int(errupt) Status (Composite) RS-232/422/485 Read Int(errupt) Status
RS-232/422/485 Setup (Composite) RS-232/422/485 Setup block
RS-232/422/485 Write Hardware FIFO (Composite) RS-232/422/485 Write Hardware FIFO block


macaddr Convert string-based MAC address to vector-based address
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