Arduino for STM32

All F4xx ever have got the ART. It has to be enabled, then it does not matter how many ws you have (the ART accelerate the flash access). You may overclock to 2ws @96MHz, it may or may not work. Seems like OLD F4's doesn't , hence the check https://github.com/stm32duino/Arduino_Core_STM32/blob/835a...

Seems like the PILLF401 runs 84MHz WUTTT ... I Can't upload a 98KB image Is there a limit of 100K on pics ?? That must be raised a bit ... Code https://github.com/stm32duino/Arduino_Core_STM32/blob/835a0143cc3a1fe47d858d697e080931f8242a2c/variants/PILL_F401XX/variant.cpp Clk84 PILLF4xx-84MHz.png Clk...

For DISCO F407, I think yes. https://github.com/stm32duino/Arduino_Core_STM32/blob/835a0143cc3a1fe47d858d697e080931f8242a2c/variants/DISCO_F407VG/variant.cpp#L191 For the black no. fpiSTM My disco F407 is old --- Like bought within 1yr from 1'st release ... Prob no ART in that one. Also makes the t...

I have got BlackF407 board with 407ZET (144pin) on it (plus 512kB 10ns sram soldered in). I do upload via J-Link (clone) with J-flash utility (set to SWD @4MHz). Then I have to unplug/plug the USB cable, the RST does not start the stuff after upload.. It seems USB code needs some fix. I have Jlink'...

Black Ali F407 F407VE-Black.png ########################################## Single Precision C Whetstone Benchmark Calibrate 0.10 Seconds 1 Passes (x 100) 0.51 Seconds 5 Passes (x 100) 2.57 Seconds 25 Passes (x 100) Use 97 passes (x 100) Single Precision C/C++ Whetstone Benchmark Loop content Result ...

F407ZE.png F407ZE -O2 ########################################## Single Precision C Whetstone Benchmark Calibrate 0.10 Seconds 1 Passes (x 100) 0.51 Seconds 5 Passes (x 100) 2.57 Seconds 25 Passes (x 100) Use 97 passes (x 100) Single Precision C/C++ Whetstone Benchmark Loop content Result MFLOPS MO...

407VE.png -O2 ########################################## Single Precision C Whetstone Benchmark Calibrate 0.10 Seconds 1 Passes (x 100) 0.51 Seconds 5 Passes (x 100) 2.57 Seconds 25 Passes (x 100) Use 97 passes (x 100) Single Precision C/C++ Whetstone Benchmark Loop content Result MFLOPS MOPS Secon...

I have a Black F407 https://www.aliexpress.com/item/4000103742703.html How do you upload to that one ? DFU or SWD ?? I t has some buttons : (Left) RST + K_UP - (Right) KD + ??? (bad silkscreen) I tried RST + K_UP (thought upload) .. But it doesnt go into DFU mode. Edit: Ahh K_UP = Wakeup I'm lazy - ...

I selected Disco
Hmm the forum doesn't like Colons in the upload filename
Menu_2020012608:18:35.png is flagged as invalid

/Bingo

@Pito

Your (-O2) N2 is quite different from mine
viewtopic.php?p=891#p891

You get 86 , i get 81

/Bingo