METHOD AND APPARATUS FOR ABORTING BLOCKED BUS ACCESS BETWEEN A MASTER CONTROLLER AND CONNECTED PERIPHERALS

摘要

The invention discloses a method for aborting blocked bus access between a master controller and connected peripherals communicating via a bus protocol over a bus and an apparatus performing the inventive method. The objective of the invention to indicate and specify a method by which a bus access by peripherals can be terminated and a master controller of the SoC get back the access to the connected peripherals also in an interrupt service routine will be solved by a method comprising the following steps: - an interrupt event message is sent to the master controller for starting an interrupt service routine, whereas the interrupt event message is also sent to a connected peripheral which blocks the bus, - the master controller jumps into the interrupt service routine and - the peripheral aborts its bus access and unblocks the bus by sending an abort interrupt message to the master controller, and - the master controller accesses the unblocked bus for serving the interrupt service routine, and - after leaving the interrupt service routine the master controller jumps back to a main routine.