Search found 670 matches

by ag123
Thu Jul 27, 2017 3:02 pm
Forum: STM32F4 Boards
Topic: How to flash STM32_F4VE
Replies: 9
Views: 135

Re: How to flash STM32_F4VE

it is actually hidden in this thread
http://www.stm32duino.com/viewtopic.php ... =10#p26203
that's how i did it
by ag123
Thu Jul 27, 2017 2:45 pm
Forum: All other boards
Topic: very small STM32F405 board
Replies: 11
Views: 185

Re: very small STM32F405 board

there is actually an 'old' thread here discussing 'tiny' stm32f4 boards http://www.stm32duino.com/viewtopic.php?f=39&t=1977 one of those tiny F407VE boards i got are these http://www.stm32duino.com/viewtopic.php?f=39&t=1977&start=10#p26277 http://www.stm32duino.com/viewtopic.php?f=39&t=1977&start=40...
by ag123
Wed Jul 26, 2017 2:20 pm
Forum: General discussion
Topic: issue with sd card
Replies: 9
Views: 143

Re: issue with sd card

i don't have a real scope... only "this": https://www.hackster.io/vincenzo-g/diy-logic-analyzer-f61ee5 i could try with it using SD_SCK_MHZ(1), maybe it will work :?: I already use the 3.3V from a stand alone supply now your logic analyzer is *really* useful, but my guess is like steve suggested ch...
by ag123
Wed Jul 26, 2017 9:29 am
Forum: General discussion
Topic: issue with sd card
Replies: 9
Views: 143

Re: issue with sd card

are you using greiman's sdfat? https://github.com/greiman/SdFat https://github.com/greiman/SdFat-beta/tree/master/SdFat/src and pulled in the correct SPI.h and SPI.cpp into your build path? https://github.com/rogerclarkmelbourne/Arduino_STM32/tree/master/STM32F1/libraries/SPI and u've got the pins c...
by ag123
Mon Jul 24, 2017 8:41 am
Forum: Maple mini
Topic: Maple Mini SERIAL PORT is Disabled
Replies: 9
Views: 157

Re: Maple Mini SERIAL PORT is Disabled

please install your sketch in flash (e.g. alt=1 install to 0x8005000 for maple boot loader) you are selecting install to ram which would likely need you to meddle with boot pins etc which is *untested* note that if your maple mini has the stm32duino boot loader installed it would have alt=0 (not use...
by ag123
Mon Jul 24, 2017 7:56 am
Forum: General discussion
Topic: Combining Blink & Count to the bootloader
Replies: 36
Views: 1164

Re: Combining Blink & Count to the bootloader

i didn't actually have an avr, i started messing with mcu's in stm32 & is quite happy that way, :lol: i'd think stm32f1 is actually a good mcu to get started feature rich but an initial rather steep learning curve. the initial goofs as it seemed tend to be messing with those 'perpetual bootloader' b...
by ag123
Mon Jul 24, 2017 7:29 am
Forum: General discussion
Topic: Blue Pill that kills
Replies: 3
Views: 110

Re: Blue Pill that kills

my guess is measuring voltages before and after the LDO and the various components systemically may help to locate the problem. e.g. those 3.3v power pins should read at least around 3v and when usb is connected the 5v pin should read around 5v you may possibly compare the voltages between the good ...
by ag123
Thu Jul 20, 2017 12:14 pm
Forum: Projects
Topic: STEP GPS LOGGER, GPS CLOCK, GPS-SMS send, Bicycle computer and more
Replies: 8
Views: 313

Re: STEP GPS LOGGER and more

wow, but do post in english as more people in the world would be able to read this as well :D
normally i'd simply program this on an android phone as it needs gps + mobile (gsm/3g-wcdma/lte) etc
to do all that on stm32f103cb 20k sram with a gui is quite an achievement :D
by ag123
Tue Jul 18, 2017 7:26 pm
Forum: General discussion
Topic: pricing disparity implies higher forward prices?
Replies: 2
Views: 77

pricing disparity implies higher forward prices?

bluepills are presently selling for $2 maple mini (clones) about double that https://www.ebay.com/sch/i.html?_from=R40&_nkw=stm32f103&_sacat=0 however the list prices on ST's web site http://www.st.com/content/st_com/en/products/microcontrollers/stm32-32-bit-arm-cortex-mcus/stm32-mainstream-mcus/stm...
by ag123
Mon Jul 17, 2017 2:59 pm
Forum: Projects
Topic: stm32 car fuel injection ecu
Replies: 6
Views: 287

Re: stm32 car fuel injection ecu

oops i forget about this thread, but speeduino do look pretty interesting & possibly fun, but do agree that if things go wrong it may be possibly explosive stm32 given its speed vs atmega would likely run both the engine & show you all the graphs e.g. fuel economy on an lcd while the car is running....