Is there away to access the system bootloader through something like a UART port?

[JChan.0]

I'm using a STM32 Nucleo F429ZI. I'm wondering if there's a way to access the system's bootloader (not an IAP bootloader) through one of the Nucleo's communication ports (e.g. a UART port), and if this requires any hardware connections like connecting the boot0 pin to high or if everything needed can be done through software.

[TDK]

AN2606 lists the available UART ports for the bootloader. There are at least 2 and probably 3 pin pair options available.

You will need to ensure the bootloader is active by pulling up BOOT0 on reset or by jumping to the bootloader within your code.

[gregstm]

I use the UART bootloader for everything. For the Nucleo board below I added a little proto board that includes a switch to pull Boot0 to 3V when required. The 4 pin socket on the board brings out 3V, GND, UART TX and RX. I have a separate cable that has an RS232 converter chip on it that connects via the 4 pin header/socket. All my boards use the same cable/system.

(Note - the other protoboard in the picture is just a PDM microphone (flipped on its back)).