AN2361 Application note ''Interfacing with STR91x s/w lib using CAPS'' says that interface file 91x_caps.c is provided with it. I can't find it anywhere on my PC, looking at the standard libs etc. Any ideas ? Found it ! Zip file next to the pdf file on the ST download page. Sorry for the inconvenience. [ This message was edited by: Arm_Wrestler on 28-07-2006 17:23 ]