STM32

Blue Pill Board Features

Used on BLUE-PILL-HUB card

• STM32F103
  • 72 MHz
  • 64KB Flash (most have 128KB)
  • 20 KB SRAM
  • 3.3V regulator
  • 16 MHz
  • 1 of x12-bit, A/D converter
  • 7-channel DMA controller
  • SPI, I2C, UART interfaces
  • 7 timers
• MicroUSB
• Reset button
• Download jumper
  • Replaced with a slide switch
• Power LED
• PC 13 LED
• SWD connector
• RTC crystal

Black Pill Board Features

Not pin compatible with Blue Pill due to power pin locations

Can't be used on BLUE-PILL-HUB card without modifications

• STM32F401CCU6 or STM32F411CCU6 CPU
  • 84/100 MHz
  • 256/512 KB Flash (most have 128KB)
  • 64/128 KB SRAM
  • 3.3V regulator
  • 2x12-bit, A/D converter
  • 7-channel DMA controller
  • SPI, I2C, UART interfaces
  • 7 timers
• I2C EEPROM footprint
• USB-C
• Reset button
• Power LED
• PC 13 LED
• SWD connector

Warning: The +5V pins on this board are directly connected to the +5V pin of the USB connector. There is no protection in place. Do not power this board through USB and an external power supply at the same time.

• WeAct Black Pill V1.2 - Helpful page

Blue Pill vs Black Pill Pinout

Arduino IDE

• Hardware files to support STM32 boards, on Arduino IDE 1.8.x including LeafLabs Maple and other generic STM32F103 boards
  • Arduino STM32 Wiki
  • Installation
• Arduino Alternative - STM32 Blue Pill Programming Via USB

Uploading Code

• FTDI connection to Blue Pill Hub FTDI connector
  • FTDI TX (to Blue Pill RX) (PA10 pin on STM32)
  • FTDI RX (to Blue Pill Tx) (PA9 pin on STM32)
• Set Switch (or jumper) on Blue Pill module set towards center of card to upload card to board

• In Arduino IDE,
  • Tools
    • Board "Generic..."
    • Upload method: "Serial..."
    • Port: [the comm port]

• Upload code
  • Takes a while
• Set Switch (or jumper) on Blue Pill module set towards edge of card to run
• Press reset button

Annotated

Mechanicals

Blue Pill Card Schematic

Boot Jumpers