Softing CAN-AC2-PCI with Philips SJA1000 FIFO Read XMT Level block
Simulink® Real-Time™ Library for CAN
The FIFO Read XMT Level driver block reads the current number of CAN messages stored in the transmit FIFO that the firmware is to process. 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 driver ignores the new message. You can use this driver block to check for this condition and perform an error action. For example, you can stop execution or wait for the firmware to remove a message from the 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).
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.
Defines the sample time at which the FIFO Read XMT Level driver block is executed during a real-time application run.