Arduino for STM32

Does the VLDISCO (F100) support USB at all ?

The USB plug on the board is for the onboard ST-Link-V1 debugger

/Bingo

robca wrote: ↑

Sat Feb 29, 2020 11:08 pm

Paypal offers "free return shipping" if you enable it for free on your account,

Any quick hint , how to enable the free return on a PP account ?

/Bingo

i am using two stm32f407 and two mcp2515 and ide using is arduino and iwant to send one stm32f407 data another stm32 using can bus so help me out thank you!!! Afaik MCP2515 is a SPI driven Canbus controller. Doesn't the F407 have a built in canbus interface available ?? I'm quite sure there are Ard...

Well this day went totally cortex + FPU :) But at lest i got BLACKPILL_F411CE implemented in the ST Core @96MHz + ART Enabled BPF411CE.png I ran my first program on my "Ali Black-F407" I got my DISCO-F407 dusted off And i learned a lot about the boards.txt & variants directories I'm off ... ZZZzzzzz...

What does this flag do ?? ST Core does not specify : -fsingle-precision-constant GenF4.build.flags.fp=-mfpu=fpv4-sp-d16 -mfloat-abi=hard F411 Built as cortex-m7 No -fsingle-precision-constant -O2 Fast N1 , slow N5 , slow MWIPS ########################################## Single Precision C Whetstone B...

Mispost

fpiSTM wrote: ↑

Sun Jan 26, 2020 7:14 pm

This is provided by ARM:
https://github.com/ARM-software/CMSIS_5 ... SP/Lib/GCC

Damm ...
".a" files ==> Compiled libraries

No source ..

Well i'd prob not understand the "magic" anyway

/Bingo

I had to .... Built F411 but as a cortex-m7 boards.txt :oops: GenF4.name=Generic STM32F4 series GenF4.build.vid=0x0483 GenF4.build.core=arduino GenF4.build.board=GenF4 GenF4.build.extra_flags=-D{build.product_line} {build.enable_usb} {build.xSerial} {build.bootloader_flags} #GenF4.build.mcu=cortex-m...

fpiSTM wrote: ↑

Sun Jan 26, 2020 6:32 pm

Maybe the cmsis library helps on this...

You mean this one ??
GenF4.build.cmsis_lib_gcc=arm_cortexM4lf_math

Seems like the F7 uses this one cmsis_lib_gcc=arm_cortexM7lfsp_math
Is the source available for those math libs ??

/Bingo

But according to the ARM or arm-gcc doc it is NOT wrong to specify -march=armv7e-m+fp. -mfloat-abi=hard -mfpu=fpv4-sp-d16 -fsingle-precision-constant We might have to add -mcpu=cortex-m4 to the above , in order confuse arm-gcc (thinking it's a cortex-m7) But unless someone "speculates" in coding aga...