Black Pill STM32 Arm Controller

Description

Black Pill STM32 Arm Controller Module with USB-C socket

⚠️ It’s not physically compatible with the Pro Micro. The PCB needs to be specifically designed for it.

Specs:

• Powerful Arm Cortex M4 core with high clock speed
• A lot more memory, flash and I/O pins than the Pro Micro
• USB-C socket
• tinyuf2 bootloader, can be programmed easily
• Runs on 3.3 V, but many pins are 5 V-tolerant
• On-board reset and boot buttons
• Comes with 2 20-pin headers and 1 4-pin programming header (not required thanks to the tinyuf2 bootloader)

Both versions are pin-compatible. (For comparison: the ATmega32u4 on the Pro Micro has 16 MHz clock, 2.5 kB SRAM, 32 KB flash and only 18 I/O pins.)

To flash the QMK firmware to the Black Pill connect it to your computer and set it to bootloader mode:

• Press and release one time the BOOT0 button.
• Press and release the NRST button 2x

First time when connected via usb-c to the computer it will show up as a mass storage driver. Just drag&drop your .uf2 compiled keymap.

More details here qmk tinyuf2 docs

Add in your keyboard firmware, in the rules.mk or .json file:
“processor”: “STM32F411”,
“bootloader”: “tinyuf2”

then just flash the controller with your keybnoard’s keymaps:
qmk flash -kb <keyboard> -km <keymap>

QMK firmware Black Pill Troubleshooting

Product on photography is illustrative and for demonstration purposes only. Received product might look different, while it is still the same.