Using a Nucleo-h723 and would like to, via USB DFU, load my program using the built-in bootloader.

[GRoss.5]

Connections:

D- = PA11

D+ = PA12

and Gnd to Gnd

As well, Boot0 is connected to VDD. I have nothing connected to the UARTS or CAN.

Even with this setup, upon reset, the system runs the code I have downloaded (via ST-Link) rather than the bootloader. I think it may have something to do with the crystall.

[KArum.3]

Hi,

First of all ​Nucleo-h723 build-in bootloader is dedicatedly designed for USART software peripheral. So you can't run the on board bootloader otherwise use USART.

[MM..1]

No first of all read AN2606

Pattern 10

Boot(pin) = 0 and BOOT_ADD0(optionbyte) = 0x1FF0

Boot(pin) = 1 and BOOT_ADD1(optionbyte) = 0x1FF0

Check BOOT_ADD

[Uwe Bonnes]

Connect both USB ports. Short CN1 Pin5 to Pin 7. Reset via the black button. If you did not fiddle with the option bits, DFU will appear.