Posted on June 16, 2016 at 16:45I was hoping to wire an external potentiometer to the ADC on the STM32F746G but even bypassing the input cap (C107) I still seem to get AC readings.  E.g. I bump the pot one way and I get a positive blip, I bump it th...

Posted on June 14, 2016 at 17:09Tried to post a reply to my older posting asking about this but it says ''page not found'' hence the new post.  I think I found the issue.  Down in the bowels of WM8994 setup the driver is setting registers 0x29 and 0...

Posted on June 07, 2016 at 16:54I posted on the eval forum but after further experiments trying here. I'm using the STM32F746G Discovery.  I'm using the audio_loopback.c demo slightly modified to use line inputs instead of mics.  I get lots of cross...

Posted on June 05, 2016 at 15:42I'm using the STM32F746G to play with some audio DSP stuff and it's working fine with headphones but when I connect the output to external amps I get whine and low signal level.  I'm using the OUTPUT_DEVICE_HEADPHONE ...

Posted on May 30, 2016 at 16:28The STM32F7 onboard DAC is only 12 bits.  I only need mono audio input.  Suppose I drive the left ADC input directly and the right from an op amp gain stage of say x16 and then combine the lowest 4 bits of R with left-...