I have an existing project using a ST M4 and there is much I can use for another project using another ST M4 and having external RAM. I can start a new project with the above and 'steal' routines, but would rather just add/change the project. is there a (relatively) simple way to do that?
In the (distant) past, with C51, I found that trying to change the target device in an existing project didn't work.
I don't know if that is still the case, and/or whether it applies to ARM.
The solution was simply to start a minimal fresh project with the new device, and then just bring the old code in.