https://precomputing.com/tags/control-loops/ Recent content in Control Loops on Precomputing.com Hugo en-us Thu, 01 Oct 2026 00:00:00 +0000 https://precomputing.com/altsql-realtime-meets-a-10-ms-deadline-on-a-simulated-flash-chip-that-takes-45-ms-to-erase/ Thu, 01 Oct 2026 00:00:00 +0000 https://precomputing.com/altsql-realtime-meets-a-10-ms-deadline-on-a-simulated-flash-chip-that-takes-45-ms-to-erase/ <p>A controller runs its loop 100 times a second. Every cycle it saves a value and logs a row, and those writes have to finish within 10 ms. The trouble is the flash chip. Before it can reuse a sector it has to erase it, and on the chip the demo models, a Winbond W25Q32FV, an erase takes 45 ms typically and up to 400 ms at the slowest its datasheet allows. A storage engine that erases inside a write will, sooner or later, make the loop miss its deadline.</p>