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WeAct STM32F411CEU6 black pill
Posted: Mon Oct 28, 2019 4:03 pm
by mcauser
Anyone using this new $7 WeAct STM32F411CEU6 board?
https://www.aliexpress.com/item/4000084631884.html
Comes in 2 variants:
STM32F401CCU6 core board 64KB RAM 256KB ROM
STM32F411CEU6 core board 128KB RAM 512KB ROM
Looks like an upgrade of the old "blue pill" with a more powerful CPU and USB-C
https://www.st.com/en/microcontrollers- ... 411ce.html
Re: WeAct STM32F411CEU6 black pill
Posted: Mon Oct 28, 2019 8:27 pm
by OutoftheBOTS_
I haven't used it but the Arundio boys are liking it as a replacement for the blue pill due to the FPU of the F4 over the F1
I do believe u can buy it for about $3US
Re: WeAct STM32F411CEU6 black pill
Posted: Tue Oct 29, 2019 12:14 am
by mcauser
Re: WeAct STM32F411CEU6 black pill
Posted: Tue Oct 29, 2019 12:19 am
by mcauser
The unpopulated U3 pads on the bottom is for a W25Q32JVSSIQ 32M-bit SPI flash, according to the datasheet
Re: WeAct STM32F411CEU6 black pill
Posted: Tue Nov 12, 2019 2:28 pm
by lukesky333
The link seems to be offline. Can you provide the stuff here?
Re: WeAct STM32F411CEU6 black pill
Posted: Thu Dec 12, 2019 8:18 pm
by mcauser
Getting files out of Baidu without an account or installing their network disk is challenging.
If there are any specific files in there that you want, let me know and I’ll try and get them.
Re: WeAct STM32F411CEU6 black pill
Posted: Sun Jan 19, 2020 12:24 am
by tzviki
next to the flash pad labeled u3 there is a pad labeled c15. q:
1) what cap value should the c15 pad be populated with?
2) is spi flash module required for MicroPython on this board? otherwise, what are the benefits of adding spi flash
Re: WeAct STM32F411CEU6 black pill
Posted: Sun Jan 19, 2020 1:15 pm
by mcauser
According to the schematics, populate C15 with a “104” 0.1uF 0402 cap.
https://github.com/mcauser/WEACT_F411CE ... matics.pdf
SPI flash is not required, but it does provide more space.
When building the firmware, you can pick how you want to use it.
I am using an external W25Q128 module. 64 and 32 also work.
https://github.com/mcauser/WEACT_F411CEU6
The SPI flash pins are exposed on the side pins, so you have the option of experimenting with a few flash sizes, until you are happy to solder one on.
Re: WeAct STM32F411CEU6 black pill
Posted: Tue Jan 21, 2020 3:04 am
by tzviki
Great success, thank you!
Re: WeAct STM32F411CEU6 black pill
Posted: Mon Feb 03, 2020 10:59 pm
by gersch07
Dear all,
I’ve followed the steps above to compile MicroPython (including support for a Winbond W25Q128 Flash Chip) and successfully flashed it using the ST-Link Utility. However, the ST Virtual COM port has so far only appeared twice after plugging in the USB cable... most of the time the device remains undetected, showing „Error 43“ in the Windows device manager. I‘m not sure if this is related, but in the „STM32duino“ forum people have reported that running the MCU at 100 MHz causes the USB clock to be slightly off...
Has anyone of you had similar trouble? I’ve also opened an issue on GitHub.
Thanks for your help!