It is, I've put up various bits of code on Github (mostly targeting the 32F4 vs the F2 but it might give you some ideas. And there is a Google+ group "Cortex M Developers" which has both a rep from ARM in it and a rep from ST Micro so you can get some official answers there reasonably quickly.
--Chuck On Sun, Jan 12, 2014 at 9:35 PM, skeezix <[email protected]> wrote: > On Sun, 12 Jan 2014, Chuck McManis wrote: > > # > I will revisit after coffee :) > # > # Heh, always a good idea :-). HSE is high speed external, HSI is high > # speed Internal. > > Discovered the CMSIS Periph pdf on the ST site, which clued me in > on this point ;) > > I had (for fun) popped a 1.8MHz crystal I had lieing around on the > bench in on pins 5/6 and on 3/4 and it didn't impact anything, so I fired > off the question. I'll consult the datasheet in the morning to find the > appropriate pins to hook up a crystal to, dig out an actual 8MHz crystal, > and to find out what support the crystal needs - it likely needs a couple > small caps to ground to help stabalize it, anyway. > > I imagine doing these things will settle the question. > > If not, I'll post again. > > Coming from AVR8 and PIC8 world, the documentation is vast and > spread out; those had self contained simple datasheets, where here of > course there is the heavy ARM stuff, the reams of ST stuff, etc. Needle in > haystack but I'm coming around. > > My goals are simple for this first stage .. > - GPIOs working - check! LED blinks. > - Get speed up to full 120MHz - should be easy given libopencm3 :) > - Get timers going - for controlling video signals for example, I > need fairly precise timers; not looked into them much but hopefully > libopencm3 will simplify that a lot as well > - Funcalls in response to GPIO signals (ie: bitbanging drivers for > various peripherals.) Should be easy enough. > > Fun times ahead! > > Thanks for writing, > > jeff > > -- > If everyone would put barbecue sauce on their food, there would be no war. ------------------------------------------------------------------------------ CenturyLink Cloud: The Leader in Enterprise Cloud Services. Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical Workloads, Development Environments & Everything In Between. Get a Quote or Start a Free Trial Today. http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk _______________________________________________ libopencm3-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/libopencm3-devel
