rs485 half-duplex bootloader

[FStra.9]

I have an RS585 1/2 duplex transceiver hooked to USART2 configured for hardware flow control (RS485) on an STM32L412 micro.

Is it possible to program a virgin part using the STM32CubeProgrammer, and to later do a firmware update over this comm channel?

I searched the forums but did not find a definitive answer.

[Pavel A.]

IIRC there are RS-485 adapters that automatically switch the direction. Something like, it sets the adapter to receive and lets its host receive, until the host starts sending, then it switches to the TX mode. But yes this is a problem.