https://www.aliexpress.com/item/Free-sh … 22721.html
tried to get a picture, 450k+ for a cropped png
some details
STM32F407VET6 development board Cortex-M4 STM32 minimum system learning board ARM core board
Important Product Features:
Onboard: SD card connector
RTC Battery: CR1220
The wireless communication: NRF2401 Interface
Data storage: W25Q16
LCD interfaces support FMSC
Multi-user keys
All CPU-IO leads
2.54mm pin spacing integer multiples
Chip Introduction
STM32F407VET6
Kernel: Cortex-M4 32-bit RISC
Features: single-cycle DSP instructions
Operating frequency: 168Mhz 210DMIPS / 1.25 DMIPS / MHZ
Operating voltage: 1.8-3.6V
Package: LQFP100
Storage resources: 512kB Flash
192 + 4kB SRAM
Resources: 3 X SPI, 3 X USART
2 x UART
2 x I2S, 3 x I2C
1 x FSMC, 1 x SDIO, 2 x CAN
1 x USB 2.0FS / HS controller (with dedicated DMA)
1 x USB HS ULPII (for external USB HS PHY)
1 x 10/100 Ethernet MAC
1 x 8 to 12-bit parallel camera interface
3 x AD (12 bit, 1us, sharing 24), 2 x DA (12-bit)
I’m not sure what price Arduino.cc will end up charging for their Otto board, but that board would probably be many times cheaper for a very similar level of functionality
I think I paid the same price, about a year ago, for the F103 version of this board
and so did i
stephen
its marked up with
STM32F407VET6(F103VET6/F103VCT6)
STM32F103VE(VC)T6 STM32F407VET6
its marked up with
STM32F407VET6(F103VET6/F103VCT6)
STM32F103VE(VC)T6 STM32F407VET6
stephen
) athttps://www.aliexpress.com/item/STM32F4 … 12486.html
) athttps://www.aliexpress.com/item/STM32F4 … 12486.html
http://www.dragonwake.com/download/down … manual.pdf
http://www.dragonwake.com/download/down … T6_sch.pdf
<edit>
found the code file (99.6M) and added it to the wiki entry
http://www.dragonwake.com/download/down … 7/code.zip
</edit>
mine is [actually are] this exact board.
site doesn’t have the 407vet from the same maker judging from the layout/silk screen etc
board size is reduced, still has jtag/nrf/sdio/flash/tft hdr etc
tft hdr pins aren’t labeled for either board
stephen
https://www.aliexpress.com/item/STM32F4 … 0.0.WiBuo9
I’ve not had time to check where the USB data pins are connected to, but I tried moving what I presume are the Boot0 and Boot1 switches and the board does not enumerate on USB.
There do appear to be tracks running to the data pins, but perhaps they go to the OTG USB not the one that provides DFU
The Vendors link to their google drive for the file is
https://docs.google.com/uc?id=0Bw-L6X55 … t=download
It seems to have code in the zip as well as the cicuit, but does not contain any dodgy copies of dev environments etc
Edit.
It still doesnt explain why the F407 USB DFU bootloader is not showing up, apart from the PNP transistor attached to USB D+ and PD6.
I suppose if PD6 was low, the USB would be reset and not enumerate, perhaps I need to pull PD6 high, so that USB D+ is definitely not being pulled high
Update.
I tried the USB DFU again, and it eventually appeared as a USB device, though not for ages.
But there don’t seem to be any official STM drivers for their DFU (well if there are, they don’t make it easy to find them)
So I modified the libwdi installer script for the stm32duino bootloader driver , but just changing the VID and PID values
“%~dp0wdi-simple” –vid 0x0483 –pid 0xDF11 –type 1 –name “STM32 DFU” –dest “%~dp0maple-dfu”
and it seems to work, and dfu-util gets valid data back from the board.
But thats as far as I’ve got!
http://www.ebay.com/itm/Mini-core-board … SwnNBXXpV5
http://www.ebay.com/itm/STM32F407VET6-D … Sw8w1X~Koq
Bizarrely ebay also recommended this when I looked for the f407vet6 
Plenty to choose from.
evidently not much
- stm32f407vet6-black.jpg (90.52 KiB) Viewed 280 times
