#stm32f3

[timestechnow]

STMicroelectronics helps Panasonic Cycle integrate AI for safer e-bikes

STMicroelectronics announced that Panasonic adopted STM32F3 microcontroller (MCU) and edge AI development tool, STM32Cube.AI.

[palacita13]

OV3RQUAD STM32F3 Discovery

This is my custom OV3RQUAD quadrotor frame made by G10 1.5mm plate and cut by my homemade CNC router. Source frame and forum here. Development has moved over to http://github.com/Taulabs! This is a port of the famous OpenPilot software to the STM32F3 Discovery board. Its name is (surprise) "discoveryf3". Its features are:

STM32F303 72MHz 32bit ARM cortex-m4 power with hardware fpu

L3GD20 gyro

LSM303 accelerometer (magnetometer unused yet)

FreeRTOS based OpenPilot flight control software

compatible to stock OpenPilot GCS (enumerates as coptercontrol)

10 PWM inputs, 10 PWM outputs

2 general purpose UARTs each with selectable 3V or 5V power supply (3 additional unused)

1 I2C for adding external sensors (unused)

1 SPI for adding external sensors (unused)

4.5mm drills

its fucking big

easy to build yourself

Functional differences between CC3D and discoveryf3 are:

discoveryf3 does not support I2C on FlexiPort (but has dedicated I2C)

discoveryf3 does not (yet) support USB VCP

discoveryf3 does not (yet) support telemetry on uart because of the missing USB vsense

Files for my OV3RQUAD frames: grabcad

Discovery F3 pin assignment Schematic (thank you Menno) All PWM headers are 3 pins: (1) GND, +5V, SIG PWM input SIGs:

channel 1: PB8

channel 2: PA8

channel 3: PA9

channel 4: PA1

channel 5: PB10

channel 6: PB11

channel 7: PC6

channel 8: PA4

channel 9: PB0

channel 10: PB1

PWM ouput SIGs:

channel 1: PB5

channel 2: PD12

channel 3: PD13

channel 4: PD14

channel 5: PD15

channel 6: PA15

channel 7: PC7

channel 8: PC8

channel 9: PF9

channel 10: PF10

UARTs: (VCC configurable by jumper 3V or 5V) -> 4Pin Header (1)GND,VCC,RXI,TXO FlexiPort equivalent: (no I2C)

USART2_RXI (PA3)

USART2_TXO (PA2)

Mainport equivalent:

USART3_RXI (PD9)

USART3_TXO (PD8)

SBUS_ENABLE (PD7)

currently unused:

USART1_RXI (PC5)

USART1_TXI (PC4)

USART4_RXI (PC11)

USART4_TXI (PC10)

USART5_RXI (PD2)

USART5_TXI (PC12)

I2C2_SDA (PA10)

I2C2_SCL (PF6)

SPI2_NSS (PB12)

SPI2_SCK (PB13)

SPI2_MISO (PB14)

SPI2_MOSI (PB15)

How to flash the discovery

Get the ST-Link Utility from here stm32_st-link_utility.zip

Install it

Get the latest release archive from here http://github.com/li...Pilot/downloads

Connect the discovery board to USB using the mini-usb connector

Start STM32 ST-LINK Utility

Select Target->Connect from the menu

Select Target-> Erase Chip from the menu

Select File -> Open File... from the menu

Choose the bl_discoveryf4.bin or bl_discoveryf3.bin from the release archive

Confirm the dialog box which asks to write the data to the target

Close the software

Start the groundcontrolstation from the release archive

Go to the bootloader tab

Press the Rescue button

Hit the black reset key on the discovery. It should now have the blue led constantly on.

It should now show the discovery board connected as a CC3D

Click Open... button

Choose the fw_discoveryf4.opfw or file fw_discoveryf3.opfw from the release archive

Ignore the warning

Click on Flash button

After flashing, reset button on the discovery again

Thats it, gcs should now be showing data from the board

BOM:

Frame : G10 1.5mm OV3RQUAD

Arms : DJI F450 ARMS (4 PCS)

Flight Control STM32F3 DISCOVERY

Rx Futaba R6201SB

Motor T-Motor MT2216-11 900kv

ESC Multistar 30a OPTO

BEC 7.2V 2.5A UBEC 2-5S Lipoly (6-23v)

Propeller Graupner 10x5

Battery 3s 5000mAh

GoPro Hero 3 Black Edition

VideoTx Boscam 400mw 5G8

Tx Futaba 10CHG

My setup: I use OpenPilot GCS "openpilot_discovery_20130223_121309_83cee6714b_win32" and also the firmware.

I use the default STM32F3 gain and it fly well for me. Just need more adjustment D/R EXPO on my Tx: AIL 75% ELE 75% Read more at "HOW TO BUILD THE DISCOVERY"  and at the forums OpenPilot.