Search found 1750 matches

by victor_pv
Sun Dec 17, 2017 3:34 pm
Forum: Off topic
Topic: Linux Journal
Replies: 37
Views: 573

Re: Linux Journal

RogerClark wrote:
Wed Dec 06, 2017 10:33 am
I got suckered into buying another magazine while on a weekend break, (I forget what its called)...
Roger those breaks are called Weekends, and you should work less and get more of them so you don't forget them! ;)
by victor_pv
Sun Dec 17, 2017 3:30 pm
Forum: General discussion
Topic: generator on a timer with an interval of 25 nanoseconds ?
Replies: 9
Views: 148

Re: generator on a timer with an interval of 25 nanoseconds ?

Yes, you can obtain Mhz output in a pin by setting the reload value to 1, prescaler to 0, and timer compare to either 0 and 1.
by victor_pv
Sun Dec 17, 2017 3:11 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 498
Views: 8356

Re: F405 & F411 versions of the BluePill

I think you are right Roger. Perhaps with a few modifications it can work though. There was an initial version without DMA, that for the purposes of measuring the adc noise should still work, and may run straight in an F4. The current one may work in F3 MCUs though, since they are so close to the F1...
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: 478

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: 498
Views: 8356

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: 216

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: 498
Views: 8356

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: 498
Views: 8356

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: 498
Views: 8356

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: 498
Views: 8356

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