Arduino for STM32

i think that board is in 'generic stm32f4 series' -> 'blackpill f401cc'
you may like to review the variant files, that's perhaps a best place to find the mappings
when you choose a 'wrong' board, at best the cpu clock frequency is completely out, but the led still blinks. and normally usb fails to ...

With the STM32 Core, what are the pin mappings?

PC13 gives same result.

I'm also doing the finger dance with Boot 0 and Reset.

STM32CubeProgrammer (DFU)

Board: Generic STM32F4 Series
Board Part: Generic F401CC

I'm using these as part of the STM32 package.

Here is my output when uploading a program:

Sketch uses 22168 bytes (8%) of program storage space. Maximum is 262144 bytes.
Global variables use 3624 bytes (5%) of dynamic memory, leaving 61912 ...

Hi All,
I'm trying to do a DFU program upload via arduino for an STM32F401CC. I'm using CubeProgrammer to upload the compiled bin and verify the contents of the STM32's flash is being written starting at 0x8 -- it's all there. I'm using a jumper to pull B0 high and am verifying it shows as STM32 ...