Search found 798 matches

by ag123
Tue Dec 12, 2017 1:40 pm
Forum: General discussion
Topic: GOing mad trying to sort out sleep mode on STM32F103 Bluepill board
Replies: 12
Views: 204

Re: GOing mad trying to sort out sleep mode on STM32F103 Bluepill board

i'm not too sure if it is possible to mask certain interrupts, arm interrupts , faults & isr is rather elaborate / complicated incidentally found an app note about the low power modes as well http://www.st.com/content/ccc/resource/technical/document/application_note/ff/0a/dc/d2/5e/f5/4b/5a/CD0017169...
by ag123
Tue Dec 12, 2017 1:26 pm
Forum: General discussion
Topic: usb host contr stm32
Replies: 8
Views: 110

Re: usb host contr stm32

and some card sellers actually bundle a reader especially for the higher capacity cards that cost a little more
by ag123
Tue Dec 12, 2017 4:03 am
Forum: General discussion
Topic: usb host contr stm32
Replies: 8
Views: 110

Re: usb host contr stm32

You can use a sd card with stm32, u'd just needs to search the forum for those threads
by ag123
Sun Dec 10, 2017 3:31 pm
Forum: General discussion
Topic: short on VBAT? another board another ailment 130mA currents
Replies: 12
Views: 514

Re: short on VBAT? another board another ailment 130mA currents

i'm actually thiinking in terms of doing a gimmick capacitor like this post from pito http://www.stm32duino.com/viewtopic.php?t=671&start=10#p27426 Basically it does not matter what kind of 32kHz resonator you use - it matters how you tune the frequency exactly. The difference 12.5pF vs. 6pF mostly ...
by ag123
Sat Dec 09, 2017 5:46 pm
Forum: Off topic
Topic: STM32 powered multimeter
Replies: 14
Views: 844

Re: STM32 powered multimeter

actually stm32f103 with 12 bits adc, my guess is that it is literally pretty accurate as 2^12 = 4096
i'm not too sure how that'd translate to counts though and i'm wondering if we use both adc on stm32f103 would there be possibility of getting higher precision?
by ag123
Sat Dec 09, 2017 5:26 pm
Forum: General discussion
Topic: short on VBAT? another board another ailment 130mA currents
Replies: 12
Views: 514

Re: short on VBAT? another board another ailment 130mA currents

well i simply soldered the 32k crystal at the pc14, pc15 pins that's intended for the crystal, but this time round i succeeded in using less solder. somehow by sheer chance it fills the hole nicely and keep the crystal contacts in place on the board there is no load capacitor, it is simply the cryst...
by ag123
Sat Dec 09, 2017 7:01 am
Forum: General discussion
Topic: Programmer's Manual?
Replies: 8
Views: 251

Re: Programmer's Manual?

for 'getting started' the original leaflabs docs is an invaluable resource http://docs.leaflabs.com/docs.leaflabs.com/index.html the rest is probably in the codes and when all else fail rm0008 is the stm32f10x bible (for the h/w io parts) http://www.st.com/resource/en/reference_manual/cd00171190.pdf...
by ag123
Sat Dec 09, 2017 6:27 am
Forum: STM32F103 Boards
Topic: Blue Pill crystal does not start
Replies: 13
Views: 467

Re: Blue Pill crystal does not start

more recently i've somewhat improved on my 32k crystal soldering, a recent attempt here http://www.stm32duino.com/viewtopic.php?f=3&t=2602&p=38423#p38423 oh yes, on another note, i keep vbat powered on a coin cell battery (cr2032), rather often i simply unplug usb, cutting off power, leaving rtc run...
by ag123
Sat Dec 09, 2017 6:22 am
Forum: General discussion
Topic: short on VBAT? another board another ailment 130mA currents
Replies: 12
Views: 514

Re: short on VBAT? another board another ailment 130mA currents

now somewhat improved on a new baite mm, no shorts this time round
but the steal? no caps they are actually needed but for now i take the short cut as it seem to work
Image
by ag123
Sat Dec 09, 2017 2:37 am
Forum: Off topic
Topic: Linux Journal
Replies: 33
Views: 464

Re: Linux Journal

i'd guess due to the various proprietary nature of laptops compatibility is commonly a problem for linux on laptops. rather often it is necessary and some trouble to find 'linux compatible' laptops prior to purchase i've got linux on a Asus ux305 it works as well as this article reads and suggests, ...