Driver programming


Interrupts are not converted to signals or other asynchronous events. They are handled by any C routine which was connected to the given interrupt vector. An interrupt handler can be established by any normal thread, kernel driver is not needed.

Functions to manage interrupt handlers are system specific and that is why only classic API is available.

Kernel facilities

Drivers are written as regular POSIX or RTEMS threads. Only ISR notification function is special case, which should transfer/invoke processing to regular threads.