Measurement on CastrLabhttps://castrlab-blowfish-244231.gitlab.io/tags/measurement/Recent content in Measurement on CastrLabHugo -- gohugo.ioenluke@castrlab.com (Luke Paulson)luke@castrlab.com (Luke Paulson)© 2026 Luke PaulsonWed, 16 Sep 2026 21:30:20 -0700A Stale Buffer Recalibrated My ADC: A DMA Modification for 30kSPS Streaminghttps://castrlab-blowfish-244231.gitlab.io/posts/streaming-ads1255-at-30ksps/Wed, 16 Sep 2026 21:30:20 -0700luke@castrlab.com (Luke Paulson)https://castrlab-blowfish-244231.gitlab.io/posts/streaming-ads1255-at-30ksps/Hitting the ADS1255’s full 30kSPS rate meant replacing blocking SPI/UART calls with a double-buffered DMA pipeline, tracking down a bug where the ADC was calibrating itself off its own stale sample data, and hand-trimming HAL’s per-call DMA overhead down to about a third of where it started.