Search found 1747 matches

by victor_pv
Sat Dec 16, 2017 2:38 pm
Forum: USB to Serial adaptors
Topic: STM32 and Arduino Uno like USB to UART
Replies: 6
Views: 459

Re: STM32 and Arduino Uno like USB to UART

one of those things that's needed by the stm32's built-in serial(uart) boot loader is that it needs an 8 (bits word size) E (even parity) 1 (stop bits) to communicate. http://www.st.com/resource/en/application_note/cd00264342.pdf Thanks! I have been trying to flash one thru an ESP8266, and was susp...
by victor_pv
Fri Dec 15, 2017 1:45 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 493
Views: 8286

Re: F405 & F411 versions of the BluePill

As the noise on the ADC is one of the things we want to get better than the existing bluepills, does anybody have ideas of good testcases? Pigoscope may be good code to visualize the noise. See what shows when floating, and when connected to known value with large resistors. Since at the same time ...
by victor_pv
Thu Dec 14, 2017 3:13 pm
Forum: IDE's
Topic: STM acquires Atollic
Replies: 13
Views: 182

STM acquires Atollic

Just read this now, STM acquires Atollic:
http://www.st.com/content/st_com/en/abo ... c2839.html
by victor_pv
Thu Dec 14, 2017 2:19 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 493
Views: 8286

Re: F405 & F411 versions of the BluePill

That's what I mean, that pictures may look similar in Ali, but then be again slightly different. If you are going to enlarge the front holes, may be worth enlarging the rear ones too a little bit just in case... The main difference I see is that the front to rear holes separation is almost 1mm bigge...
by victor_pv
Wed Dec 13, 2017 8:58 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 493
Views: 8286

Re: F405 & F411 versions of the BluePill

Thanks for update. I can imagine how frustrated you must be with the connectors, hopefully the footprint can be made to fit both without any problem, still I bet there are even more styles in aliexpress and someone may get a different one...
by victor_pv
Wed Dec 13, 2017 6:12 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 493
Views: 8286

Re: F405 & F411 versions of the BluePill

Squonk if the design in Eagle is all good, do you want to share the Gerbers to order some PCBs? or you expect some changes in the redesign with Kicad?
by victor_pv
Tue Dec 12, 2017 9:20 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 493
Views: 8286

Re: F405 & F411 versions of the BluePill

Not 100% certain, but I think in the F1s the page size is the same size for all pages in the same device, but look at this with the F4, 3 different page sizes! in he same device:
https://github.com/victorpv/F4Bootloade ... fu_flash.h
by victor_pv
Tue Dec 12, 2017 4:28 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 493
Views: 8286

Re: F405 & F411 versions of the BluePill

I think the register addresses for the GPIO are different (and also for the USB controls), and I know the GPIO clock settings etc will be different. But the GPIO stuff should be easy to crib from the LibMaple F4 core. I believe you are right about GPIO, just the base addresses are different, but sa...
by victor_pv
Tue Dec 12, 2017 3:17 am
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 493
Views: 8286

Re: F405 & F411 versions of the BluePill

Yesterday I saw an old video from STM on the right way to jump to the rom bootloader: https://www.youtube.com/watch?v=cvKC-4tCRgw Seems to be straightforward, have not tested it thought, but should be easy to test. I'll try when I get a second. @Roger you are giving me too much credit, I barely modi...
by victor_pv
Mon Dec 11, 2017 11:42 pm
Forum: General discussion
Topic: AC Dimmer
Replies: 40
Views: 376

Re: AC Dimmer

Victor I looked at the data sheet for the moc3043 but the Zero crossing part if the chip something to do with only turning on the triac at zero crossing and not part of the detection as far as I can see I think it’s for a different use, where you have a highly inductive load and don’t want to turn ...