Arduino for STM32

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

ST Core Just dug out an original STM F407-Discovery (Old board) -Os ########################################## Single Precision C Whetstone Benchmark Calibrate 0.14 Seconds 1 Passes (x 100) 0.71 Seconds 5 Passes (x 100) 3.57 Seconds 25 Passes (x 100) Use 70 passes (x 100) Single Precision C/C++ Whet...