How to disable DAC output buffer on STM32F072CB?

[Bozog]

Hi, not sure if I'm being stupid, but I can't find any easy way to disable the DAC output buffer on my STM32F072CB
Ideas appreciated!

[fpistm]

Hi @Bozog
It is configured here:

Arduino_Core_STM32/libraries/SrcWrapper/src/stm32/analog.cpp

Line 412 in 641f3d8

dacChannelConf.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;

So not possible to change the value except if you change it manually.
If you want you can submit a PR to be able to redefine it, something like this:

#if defined(DISABLE_DAC_OUTPUTBUFFER)
    dacChannelConf.DAC_OutputBuffer = DAC_OUTPUTBUFFER_DISABLE;
#else
    dacChannelConf.DAC_OutputBuffer = DAC_OUTPUTBUFFER_ENABLE;
#endif

Then you will be able to disable it by defining the DISABLE_DAC_OUTPUTBUFFER using build_opt.h or the hal_conf_extra.h

[Bozog]

Thanks for taking the time to reply, I did some testing in cube, turns out I don't need to disable it after all :)
There are certainly circumstances where disabling it would be beneficial although.
Regards