Hi,
We have started out first embedded linux project (first linux project) with a PPC board from men with ElinOS (Linux 2.4). This PPC has a number of external interrupt inputs, and we would like to use one of these as an external sync input. An external 50Hz signal is connected to the interrupt. What is the best/ standard way to handle such an interrupt in Linux ? Do we need to write a device driver, or can we handle such an interrupt in user code ? We are using pthreads, and would like to signal a semaphore in a task when the interrupt occurs. Any pointers to help us on the correct track would be welcome.
Regards Anton Erasmus