STM32L433: can't make sense of Flash Loader Demonstrator
During development I've been using ST-LInk to program the STM32L433 which of course works perfectly. I want to release the firmware and allow users to be able to update the code over UART2.
I've set BOOT0 and can see the device using the latest version of the STM Flash Loader Demonstrator program (V2.8.0). It reports PID = 435, BID = NA, Version 3.1. The flash mapping panel is completely blank. It says it is read protected although I haven't set any protection.
I can use the option to disable read protection and this seems to work - I get the message "Read protection was successfully removed" but if I try to read the chip it again says it is read protected. If I try and erase or write the chip I always get the read-protected message.
I'm missing something as usual but what?
Help gratefully appreciated