How to freeze NIOS2 during sensitive measurement?

Hi,

thanks for the very elaborate answer! I need to re-check if the slewrate/current settings are optimized as you suggest. Regarding layout, there isn't much room for improvement (I'm really confident you would agree on that after reviewing the board). Separating measurement logic and CPU is possible and would solve the problems, but we currently try hard to reduce the size and number of parts, therefore a single Cyclone has to do almost everything. At the moment, we specifically look for a software improvement (and "software" also includes FPGA configuration). The routing/placement/fitting of the measurement logic already has been manually optimized and "locked" for optimal results. Maybe we should spend some more weeks to optimize the fitting of the NIOS and its standard peripherals.

Kolja