AnsweredAssumed Answered

@clive1 - re; Alternate Function Reply

Question asked by Knee_Ph.D..Trahn on Aug 26, 2016
Latest reply on Aug 26, 2016 by Clive One
clive1,

I have attempted repeatedly to reply to your post to me. STM server sw apparently, has a bug which prevents me from posting replies. However, I can post 'new' messages, so here is a somewhat tardie reply.

Thank you for your understandable answer and example. It works, hee hee, and its clear to me how it works...:)

I have another question which I can't find an answer for in any of the manuals I have.  Regarding setting the I2C_CCR frequency settings which the manual (RM00368) identifies as being reliant upon "fPCLK1", which as I said before, I can't find the module to which that label references in either the F401 datasheet or the ref_man.  I2C clk speed Smode freq "must be at least 2MHz while Fm must be at least 10MHz". In attempting to verify that my code meets that spec, I can't find the module or the register to which it is affiliated?  I pray that my questions are not too 'dummie'? I did see a very brief statement re; APB1 bus, but in looking at the RCC module subsystem dwg I see no reference to the fPCLK1 label. (that dwg is pretty poor for other reasons too, IMO.)

In any case thanks again and in advance for your time.

armor
ps, fyi, I was the debug eng'r for the prototype L2C control-segment digital-signal-processor (of the 32 rack-mount units deployed in DoD bunkers) that measure precision GPS constellation timing and control selected elements of the selective-availability of the constellation, for the prime.

Outcomes