Echelon FTXL - Manual (Page 192)

180 FTXL LonTalk API
Function Description
LonDriverTransceiverIrq() The main body of the ISR for processing input from the FTXL
Transceiver’s IRQ~ pin. This function is implemented in the
FTXL library, and is called by an interrupt routine defined in
the FTXL HAL.
LonEnableInterrupt() Enables the FTXL ISRs.
LonRegisterIsr() Registers the FTXL ISRs with the Altera HAL.