Hi, I recently designed a custom stm32F405RGT6 board. However, I was unable to use the DFU mode.
From what I understand, bootloader comes with DFU enabled. However, when I used stm32cubeprogrammer, it kept mentioning "DFU not detected". This is my schematic. I've tried reading various posts and couldn't troubleshoot the error.
What I have done so far:
1) Checked the voltage of the BOOT0 and BOOT1 pins. (BOOT0=Low, BOOT1=HIGH)
2) Installed the drivers for the COM PORT (was included with the installation of stm32cubeprogrammer.
3) Double checked for any shorts (Didn't find any)
Unfortunately, when laying out the connections, I forgot to route out the SWD connections. Therefore, limiting my options! Thank you so much in advance for any help I can get.
These are the schematics for my MCU.
> Checked the voltage of the BOOT0 and BOOT1 pins. (BOOT0=Low, BOOT1=HIGH)
BOOT0 should be high and BOOT1 should be low to boot into the bootloader.
Schematic looks okay. I don't see a bulk capacitor on VDD anywhere, should have a 4.7uF somewhere, and your VCAP caps should be 2.2 uF, not 10 uF. Probably not an issue here.
Getting started with STM32F4xxxx MCU hardware development - Application note
There is an internal ADC connection for VBAT, no need to make another one externally.
It's going to be very hard to be productive developing without a SWD port.
