We had run our STM32F207 Hardware over night with a battery. Now the battery is empty and we can't flash the STM32F207 with Ulink Me (of course with proper powersupply).
Ulink says: Error: Flash Download failed - "Cortex-M3"
We can check the RDP register: the value is 0xff so we are in RDP Level 1.
We try to flash the STM32F207 with the " erase full chip"-Option but Full Chip Erase failed. If we try to flash an other STM32F207-Hardware this works fine.
So we tried to flash \Keil\ARM\Boards\Keil\MCBSTM32F200\Blinky with OPTs set to Level 0 but we can't flash it.
So we have 2 Questíons
How is it posible that the Level change form 0 to 1 without any line of code to do this? How can we disable the Read Out Protection with Ulink Me?
For this, you need a STLink, AFAIK. Maybe you can use a cheap STM32F0 discovery as a programmer.