Acci FPV Flight Controller - Betaflight STM32F405 / AT32F435

STM32F405 & AT32F435 Flight Controller for Betaflight firmware drones.

Yes, you can use any of those CPU with the same board. AT32 is more powerful, cheap and fully supported, I recommend use AT32F435.

The main idea of this project is to learn and play while designing a functional F4 Flight Controller compatible with Betaflight firmware.

The FC has been flying in racing drones for 2 years already, tested by more than 5 pilots without issues.

Specs

• STM32F405 or AT32F435 (I recommend AT32F435)
• 6 UARTS
• MPU600 Gyro (also BMI and ICM)
• Blackbox - 128MB!
• 10v pad for DJI
• BMP280 Barometer
• OSD Support
• 3-6S voltage
• Buzzer pads
• SDA/SCL for GPS reconfiguring UART3

First test flight video

How to load betaflight

AUTOMATIC

Betaflight now oficially has the target for this board available

MANUALLY

STM32F405 Chip

• Betaflight 4.5
  • Download Betaflight repo and compile the firmware for the next target file 
  • Acci FC - Target files (github.com)
• Betaflight < 4.5
  • Download Betaflight configurator 10.8 and flash the firmware version you prefer of the target STM32F405.
  • Once the firmware is loaded connect and enter cli to load the board configuration
  • Acci FC - Target files (github.com)

AT32F435 Chip

I have already succesfully build and run the design on a AT32F435 microcontroller with Betaflight 4.5. 

• Betaflight 4.5
  • Download Betaflight repo and compile the firmware for the next target file  
  • Acci FC - Target files (github.com)

All the targets can be found here: Acci FC - Target files (github.com)

Inspired in:

• https://oshwlab.com/Heinzeri/owl-f7-v1-fc (special thanks)
• https://oshwlab.com/mesh.drone/mesh-fc-v1-backup