Documentation

Softing CAN-AC2-PCI with Philips SJA1000 FIFO Read XMT Level

Softing CAN-AC2-PCI with Philips SJA1000 FIFO Read XMT Level block

Library

Simulink® Real-Time™ Library for CAN

Description

The FIFO Read XMT Level driver block reads the current number of CAN messages stored in the transmit FIFO to be processed by the firmware. The transmit FIFO can store up to 31 messages. If it is full and a FIFO Write driver block tries to add another message to the transmit FIFO, the passed messages are lost. You can use this driver block to check for this condition and take action. For example, you could stop the execution or wait for a non-full transmit FIFO.

The block has a single output port of type double, returning a scalar value containing the current transmit FIFO level (number of messages to be processed).

Block Parameters

Board

Defines the board accessed to read the current transmit FIFO level. For more information about the meaning of the board number, see the Setup driver block. If just one board is present in the target system, select board number 1.

Sample time

Defines the sample time at which the FIFO Read XMT Level driver block is executed during a real-time application run.

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