Search found 1706 matches

by Pito
Mon Jan 22, 2018 10:05 pm
Forum: Problems with libraries
Topic: OLED_I2C
Replies: 4
Views: 37

Re: OLED_I2C

Show your sketch..
by Pito
Mon Jan 22, 2018 9:01 pm
Forum: STM32F4 Boards
Topic: [libmaple] Generic F407VE mini (vcc-gnd version)
Replies: 38
Views: 856

Re: [libmaple] Generic F407VE mini (vcc-gnd version)

Insert your sdcard in the socket on your 407 mini board and try an SdFat SPI demo. Set the sdcard's chipselect/cardselect in the sketch properly.
CS (or card select) is pin2 on the socket -> PC11.
by Pito
Mon Jan 22, 2018 8:35 pm
Forum: STM32F4 Boards
Topic: [libmaple] Generic F407VE mini (vcc-gnd version)
Replies: 38
Views: 856

Re: [libmaple] Generic F407VE mini (vcc-gnd version)

Does the SPI interface work with the sdcard?
by Pito
Mon Jan 22, 2018 8:09 pm
Forum: STM core: Bugs and enhancements
Topic: [Solved] Arduino Core for STM32 v2018.1.18 Problem
Replies: 21
Views: 130

Re: Arduino Core for STM32 v2018.1.18 Problem

Market share desktops/notebooks: Win 88.9%, Linux 2.3%.. :)
by Pito
Mon Jan 22, 2018 7:40 pm
Forum: STM32F4 Boards
Topic: [libmaple] Generic F407VE mini (vcc-gnd version)
Replies: 38
Views: 856

Re: [libmaple] Generic F407VE mini (vcc-gnd version)

@efftek: does the usb connector power the board actually? (sometimes the microsocket's pins are not soldered properly). Also the resistor dividers around boot switches have got values which are not the best choice.. I would replace the 10k pulldowns with something like 47k-100k.. ..version for F4 th...
by Pito
Sun Jan 21, 2018 2:26 pm
Forum: Libraries & Hardware
Topic: SdFat works with 256MB, but not with 4GB SDHC
Replies: 9
Views: 96

Re: SdFat works with 256MB, but not with 4GB SDHC

The smaller the SDcard the faster. Try to decrease the clocks.
Start at 72MHz main clock and 9-18MHz SPI for the SDcard.
by Pito
Sat Jan 20, 2018 9:21 am
Forum: Projects
Topic: Time interval counter (13ns resolution)
Replies: 8
Views: 218

Re: Time interval counter (13ns resolution)

When you say 72MHz/2, were you measuring a 36MHz PWM?
Those 30Hz were measured at 36MHz output. Thus with 72MHz it will be 60Hz. The OCXO was free running, none disciplining.
by Pito
Fri Jan 19, 2018 5:52 pm
Forum: New users MUST post here first, and let us know a bit about you and your projects
Topic: shujaat: [SOLVED] Volatile Qualifier
Replies: 34
Views: 387

Re: [SOLVED] Volatile Qualifier

OFF TOPIC: @Ray: your "corporate waterfall approach" will soon hit hard on the new "agile mindset" :P
by Pito
Fri Jan 19, 2018 3:01 pm
Forum: New users MUST post here first, and let us know a bit about you and your projects
Topic: shujaat: [SOLVED] Volatile Qualifier
Replies: 34
Views: 387

Re: [SOLVED] Volatile Qualifier

fyi - replacing 1288x __io with __IO in my older local Arduino_STM32 repo took 14secs (Notepad++, Find and Replace in Files).
by Pito
Wed Jan 17, 2018 10:03 pm
Forum: Projects
Topic: F405 & F411 versions of the BluePill
Replies: 629
Views: 12181

Re: F405 & F411 versions of the BluePill

Yea, that fmax is for a straight wire of length l, I think. Such big loop of wires is like a planar transformer :)..
Anyhow, I have to stop with seeing the :twisted: in the details ..