AnsweredAssumed Answered

Inverted DAC output

Question asked by bridges.daniel on May 30, 2014
Latest reply on Jun 2, 2014 by fm
Any ideas what would cause a STM32F4 Discovery board to suddenly invert the DAC output, such that 0 gives 3V and 4095 gives 0V? This does not seem to be a programming issue as the identical program worked fine prior (and on other boards). It also does not appear to be a single bad board, it has happened to me on two boards. The issue seems to unrecoverable, reloading a program, cycling power, etc do not fix it.

I had been hooking and unhooking leads, so it is possible a stray voltage went somewhere bad, but I would still like to understand the mechanism. The boards work fine otherwise (including the ADCs).