So is there a simple way of attaching and ISR to a GPIO from user code? I can see how to do it in rp2040_gpio.c in the board files but I’m hoping not to have to change the board files.
Regards, Mark _____________________________ Blog: blog.thepcsite.co.uk Twitter: @nevynuk > On 12 Aug 2023, at 20:08, Brennan Ashton <bash...@brennanashton.com> wrote: > > I would not recommend doing that. You _could_ but it will break for non > flat builds and you are explicitly violating the the OS application > interface boundary. You may also break assumptions of the OS and make it > unstable by changing important registers in interrupt controller. > > So nothing is stopping you, but you should also not expect the OS to > function correctly. > > --Brennan > > On Sat, Aug 12, 2023, 11:54 AM Mark Stevens <m...@thepcsite.co.uk> wrote: > >> Is there anyway of using the Pico SDK from within NuttX? >> >> What I am trying to do is attach a generic ISR to some GPIO pins. I’m not >> a great fan of having to modify the OS source in order to set up simple >> things like ISRs to handle button presses. I’d like to be able to do this >> from the user application rather than the board files which from what I >> have read seems to be the way to do it. >> >> My requirement is: >> >> Configure a GPIO to be input, interrupt driven and pull ups enabled >> Attach and interrupt to the GPIO (this could be one of all input GPIOs if >> I get a parameter telling me which button or one per GPIO) >> Driven from the user application >> >> From what I have read in the source (and I may be wrong) I seem to have to >> modify the board files and use a signal handler for the interrupts. >> >> I’d rather not modify the board files. >> >> Now I know you can achieve what I want in a few calls to the Pico SDK and >> I was wondering if calling the SDK is possible. >> >> Has anyone doe this? >> >> Alternatively, has anyone configured NuttX to do this from user space? >> >> Regards, >> Mark >> _____________________________ >> Blog: blog.thepcsite.co.uk >> Twitter: @nevynuk >> >> >> >> >> >>
