RS-232/422/485 Internal Blocks and Subsystems

This section describes the internal blocks of the RS-232/422/485 boards. Typically, the parameters in these blocks are controlled from the mask parameters dialog for the send/receive subsystem in which they are used.

You might need to access these blocks if you need to modify the subsystems for your use.

Note   Otherwise, do not use these blocks directly. For serial communications, use the composite serial communications drivers described in Serial Communications Support. You should not need to use the drivers described in this appendix.

This section includes the following topics:

• RS-232/422/485 Setup (Composite) — Sets up the interface characteristics for the board.

• RS-232/422/485 Read Hardware FIFO (Composite) — Reads characters from the hardware FIFO in the UART.

• RS-232/422/485 Write Hardware FIFO (Composite) — Writes the data from the input port to the hardware FIFO in the UART for this port.

• RS-232/422/485 Read Int(errupt) Status (Composite) — Reads the interrupt status for the boards in the system.

• RS-232/422/485 Enable TX Interrupt (Composite) — Enables the transmitter buffer empty interrupt when data is present in the software FIFO.

• RS-232/422/485 Filter Interrupt Reason (Composite) — Filters the output of the Read Int(errupt) Status block.

• RS-232/422/485 Board Setup (Commtech) and Interrupt Check (Quatech) (Composite) — Checks for instances where the hardware IRQ differs from the software for which it is listening.

Serial Communications Support with Internal Drivers

Blocks — Alphabetical List

Related Products & Applications

• Simulink
• Control Design
• Signal Processing & Communications
• Model-Based Design
• Physical Modeling
• Verification & Validation

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