In a Project I have an Eos based Main Program ( 1ms Tic). But beside I have a FPGA with a Register and Interrupt witch needs to be read within 20 us.
This does not fit in the main 1mS tic.
A Template to securely make this gathering in an Interrupt Function (preferably not maskable) would help alot. An external Interrupt is needed quite often beside the polled Operation of an Eos or other Scheduled Oses.